Tests of new AIDA ASIC mezzanines - 2024 production batch

Using nnlycca4/MezzX PCB test bench T9, STFC DL - attachments 1 & 2

nnlycca4 193.62.115.228

BNC PB-4 Pulser
Amplitude ?9000
Attenuator x5 IN
Frequency 25Hz
Polarity +
t_r 50ns
tau_d 200us
Delay MIN
Ref INT

Output amplitude (DSO hi Z input) c. 500mV


MACB
Program switch = 1


Power on sequence - 1 2 3 Mezzanine - attachment 3
1 - FEE64 and ASIC mezzanine cooling fans
2 - FEE64 +6.2V/+6.8A
3 - FEE64 -6.5V/-0.69A, +8V/+0.88A
4 - Mezzanine +5V/+1.7A +7V/+0.03A

At power up ASIC mezzanine +5V/+2.1A which decreases to +5V/+1.7A following DAQ SETUP

Pulser to *all* inputs via test adaptor PCB (PJCS design)

Examples of test signals as follows:

Data Ready DRDY (blue), Address bits A0-A3 (magenta), pulser (yellow) - attachments 4-7 

MUX Out (magenta) - attachment 8

LEC fast comparator (magenta) - attachment 9

Preamp output (magenta) - attachment 10


Following power up and the boot of the embedded PowerPC processor

DAQ RESET
DAQ SETUP
DAQ GO
Start ASIC Readout
*multiple* Check ASIC Load for ASIC #2 (note this check loads all ASICs)

Use DSO scope probe at MezzX PCB test points - attachment 11



All ASICs of the following ASIC mezzanines tested OK

Batch 0216240101
-0009

Batch 0213110101 
-0002

Batch 0324390101 (*new* batch 2024/Q4)

-0010
-0011
-0019

Honeywell HSS DPS sensor information https://elog.ph.ed.ac.uk/AIDA/932

Cynergy3 FSVPLC - attachment 1


Honeywell sensor - red LED continuously lit - OK

Connecting FSVPLC to the interlock box causes green power LED of 24V adaptor to blink ~Hz frequency indicating a fault condition

> 
> At AIDA test station T9, STFC DL unable to start MIDAS DAQ with 1x FEE64 ( aida04 ) - see attachments
> 
> aida04 appears to have booted OK and I can connect using telnet
> 
> MIDAS 8015 server exits - signal 1

I’ve had this problem too. The solution is to have the single FEE twice in the list in the config file. The software is then quite happy.

Alternatively a single FEE can still be accessed directly and will operate successfully.  The only thing missing is the spectra function menu. They won’t work, so FWHM is harder to determine. 

At AIDA test station T9, STFC DL unable to start MIDAS DAQ with 1x FEE64 ( aida04 ) - see attachments

aida04 appears to have booted OK and I can connect using telnet

MIDAS 8015 server exits - signal 1

Test of 4x FEE64s at AIDA test station, T9, STFC DL

startup.tcl changed from 'aida01 aida03' to 'aida01 aida02 aida03 aida04'
MIDAS 8015 server restarted

Power ON

All system wide checks OK

Pulser BNC PB-5

Amplitude 1.0V
Attenuation x1
Polarity +
Frequency 100Hz
Tail pulse, decay time 1ms
Delay 250ns (min)

ASIC settings - attachments 1-4 
Slow comparator 0x80
N.B. new ASIC settings software in use

Adaptor PCB *without* jumpers

FEE64 temperatures OK - attachment 5

WR timestamp OK - attachment 6


aida01
Rate, 1*L and 1*W spectra OK - attachments 7-9

FEE64 temperatures OK - attachment 10

aida02
Rate, 1*L and 1*W spectra OK - attachments 11-13

aida03
Rate, 1*L and 1*W spectra OK - attachments 14-17

No ADC spectra asic #4 *but* Rate, HitRate, 4*W spectra all indicate asic #4 working OK - contact issue?

aida04
Rate, 1*L and 1*W spectra OK - attachments 18-23

Bad ADC spectra asic #2 *but* Rate, HitRate, 2*W spectra all indicate asic #2 working OK - contact issue?



Date/time          ASIC mezzanine                 Pulser peak width *.*.L      MAC                   Status
                   FEE64 PCB serial #             (channels FWHM)

28.3.24 11.28      aida01 ?                       7.1,7.0,6.8,7.0              41:f6:ee              OK
28.3.24 11.44      aida02 GOC-7226-1-39/-0040     14.0,13.7,13.3,14.0          41:cf:ad              OK
28.3.24 12.14      aida03 ?                       13.2,13.2,12.0,?             42:0d:0b              OK
28.3.24 11.44      aida04 GOC-7226-1-19/-0037     15.1,?,12.8,12.8             42:0c:89              OK


Following disassembly and re-assembly

aida03 *.*.L 15.0,15.9,15.0,15.4 ch FWHM ( ADC data all channels, similar peak widths all channels )
*.*.W spectra OK
Rate, HitRate spectra OK

aida04 no change - 2.*.L spectra still bad

Micro SD cards used by the raspberry pis are cheap but prone to failing

If the system won't boot and the SD card is read only it may have failed. Best way is to buy a new micro SD card (16 or 32GB) and restore a backup

I have uploaded an image of nnrpi2 (AIDA@GSI) to aida-3 (/home/npg/nnrpi2.img)

To backup an SD card

dd if=/dev/mmcblk0 of=nnrpi2.img status=progress

To restore a backup to a new SD card

dd if=nnrpi2.img of=/dev/mmcblk0 status=progress

(/dev/mmcblk0 name may differ on different machines, is for a laptop with built in SD card reader)

https://elog.ph.ed.ac.uk/CARME/482

Snout removed from S4

All detectors removed

BB7 taken to lab
bPlastic taken to testing hall
AIDA BB18 left in box under AIDA-3 with other DSSSDs

Snout on green table in rear of Messhütte

00.55 Observe high frequency noise in aida02 & aida04 ( n+n FEE64s ) - attachments 1-5
      and aida05 ( p+n FEE64 )
      frequency c. 5MHz

      Oscillation unchanged by

      HV cycle
      ASIC control load
      FEE64 power cycle
      BNC PB-5 pulser OFF
      BNC PB-5 pulser output disconnected from test + cable ( and remains disconnected )


      BB7 HV and preamp power OFF - oscillation disappears
      Note - BB7 HV and power have been on all day and AIDA was running OK until at least 22.18 11.12.23 - go figure!


01.42 file DEC23/R7

02.00 checks

DSSSD bias -150V leakage current -5.980uA - attachment 5

FEE64 teperatures OK - attachment 6

ADC data item stats OK - attachment 7

Merger & TapeServer screens - attcahments 8 & 9

per FGEE64 Rate spectra - attachment 10 
1.8.W spectra - 20us FSR - attachments 11 & 12


02.18 ASIC check load x2

02.20 file DEC23/R8
      Final FRS setting - fragments SE 238U, PID uncertain online

02.22 zero all spectra & stats

03.23 degrader changed to 4350mg
      file DEC23/R9

03.25 zero all spectra & stats

06.00 beam stopped
     file R9 closed

06.18 pulser walkthrough test -

      BNC PB-5
      amplitude 9.0-1.0 @ 1.0V step
      attenuation x10
      polarity -
      tail pulse
      1ms decay time

      file DEC23/R11





      

MACB config 
1x level 0
4x level 1

Problem appears to related to level 1 MACB #3 ( 3 of 4 ). Transferring FEE64 inputs to MACB #4 appears to fix the problem.

Assume this means either MACB #3 or the cable to it from level 0 is the problem?

Water flow and temperature ( gauges outside S4 entrance ) OK

BNC PB-5 pulser connected to p+n FEE64s by diasy chain of test + inputs

ASIC settings 2023Nov16-18.55.20
 p+n FEE64s slow comparator 0xa, n+n FEE64s 0xf

All system wide checkks OK

DSSSD bias -150V leakage current -5.37uA - OK - attachment 1

FEE64 temperatures OK - attachment 2

ADC data item stats - attachment 3
 rates dominated by relatively few 'hot' channels
 aida06 - no cables connected to FEE64 adaptor PCB

per FEE64 Rate spectra - attachment 4
 aida06 - no cables connected to FEE64 adaptor PCB 
 system relatively quiet but has been quieter - no grounding of bPlast cabling and PSUs?

p+n and n+n FEE64 1.8.W spectra - 20us FSR - attachments 5-8
 aida06 - no cables connected to FEE64 adaptor PCB
 aida08 - no ADC calibration 



14.43 Pulser walkthrough - p+n junction FEE64s

BNC PB-5 settings
amplitude 9.0-1.0V @ 1.0V step
x10 attenuation
tail pulse
polarity +
frequency 22Hz

file DEC23/R5

15.47 R45 ends OK - see attachments 9-10
aida01 1.8.L pulser peak width 53 ch FWHM
aida06 1.8.L pulser peak width 14 ch FWHM ( no input )

15.47 file DEC23/R6 

BNC PB-5 pulser
amplitude 9.0V
frequency 2Hz

c. 19.00
Low intensity 238U fully stripped/H+/He+ - attachments 11-14
Fully stripped close to centre of DSSSD
HEC energies observed from threshold to c. 1-2GeV

19.25 Beam off
      SC41 scaler input to level 1 MACB #3 ( of 4 ) moved to level 1 MACB #4 ( of 4 )


21.00 checks


DSSSD bias -150V leakage current -6.050uA - OK - attachment 15

FEE64 temperatures OK - attachment 16

ADC data item stats - attachment 17
 rates dominated by relatively few 'hot' channels
 aida06 - no cables connected to FEE64 adaptor PCB

BNC PB-5 config - attachment 18

Merger and TapeServer browser tabs and terminal servers - attachments 19-20
 c. 160k data items/s merged
 c. 600kb to disk and forwarded to MBS

21.05.37 *all* stats zero'd

22.18 ADC data, DISC data, PAUSE, RESUME, WR data item stats - attachments 21-28
zero rate PAUSE/RESUME - one observed in c. 75 minutes

14.05 S4 closed

Water flow and temperature ( gauges outside S4 entrance ) OK

BNC PB-5 pulser connected to p+n FEE64s by diasy chain of test + inputs

ASIC settings 2023Nov16-18.55.20
 p+n FEE64s slow comparator 0xa, n+n FEE64s 0xf

All system wide checkks OK *except* adia08 ADC calibration failed

DSSSD bias -150V leakage current -5.28uA - OK - attachment 1

FEE64 temperatures OK - attachment 2

ADC data item stats - attachment 3
 rates dominated by relatively few 'hot' channels
 aida06 - no cables connected to FEE64 adaptor PCB

per FEE64 Rate spectra - attachment 4
 aida06 - no cables connected to FEE64 adaptor PCB 
 system relatively quiet but has been quieter - no grounding of bPlast cabling and PSUs?

p+n and n+n FEE64 1.8.W spectra - 20us FSR - attachments 5-8
 aida06 - no cables connected to FEE64 adaptor PCB
 aida08 - no ADC calibration 

18.25 

SSSD bias -150V leakage current -5.100uA - OK - attachment 9

FEE64 temperatures OK - attachment 10

ADC data item stats - no significant change - attachment 11
 rates dominated by relatively few 'hot' channels
 aida06 - no cables connected to FEE64 adaptor PCB

per FEE64 Rate spectra - no significant change - attachment 12
 aida06 - no cables connected to FEE64 adaptor PCB 
 system relatively quiet but has been quieter - no grounding of bPlast cabling and PSUs?

p+n and n+n FEE64 1.8.W spectra - 20us FSR - attachments 13-14
 aida06 - no cables connected to FEE64 adaptor PCB
 aida08 - no ADC calibration 

FEE64 configuration for 1x MSL type BB18(DS)-1000 24cm x 8cm DSSSD

*Beam into page*

         
                  aida09                           BB7 FEE64

         aida05   aida01   aida06                  p+n junction FEE64s

aida02                              aida04         n+n Ohmic FEE64s
           *
         aida07   aida03   aida08                  p+n junction FEE64s

* approximate position of c. 1.5cm diamond-shaped hole in black cloth optical screen positioned between 'upstream' bPlast and BB18 DSSSD.

Change n+n FEE64 aida04 d8:80:39:41:f6:b7
 asic #1 faulty

aida04 MAC from d8:80:39:41:f6:b7 to d8:80:39:41:ba:2b

restart dhcpd ( systemctl restart dhcpd )


DSSSD bias -150V -5.17uA - attachment 1

FEE64 temperatures OK - attachment 2

All system wide checks OK

ADC data item stats - attachment 3
 High rates observed in all FEE64s *except* aida01 & aida04 => aida04 asics #1-4 OK
 CC/VP have commenced cabling bPlast - will await completion of install to review noise
 

n+n 1.8.W spectra - 20 us FSR - attachments 5
 
per FEE64 rate spectra - attachment 4



18:20 AIDA noise status test

      bPlast - cabling complete, power on - all sides 
      BB7 Mesystec preamps connected, power off, no detector HV

DSSSD bias -150V -5.355uA - attachment 6

FEE64 temperatures OK - attachment 7

All system wide checks OK

ADC data item stats - attachment 8
 Rates c. 10-20k mostly dominated by a few 'hot' channels

per FEE64 rate spectra - attachments 9 & 10

p+n 1.8.W spectra - 20us FSR - attachment 11
 bPlast using 152Eu source for test - signal observed aida01 3.8.W may be recoil electron from Compton event
n+n 1.8.W spectra - 20 us FSR - attachment 12

Some photos of bPlast & BB& preamp/cabling attached

re-bPlast note that
cables screened 3M 1245 + Kpaton + drain wire -> drain wires *not* connected to ground
PSU ch 4 not ground referenced
 

Stack re-assembled - upstream to downstream

- 'upstream' bPlast
- no spacer
- black cloth optical screen on steel frame ( c. 1.5cm diamond hole lower left side in direction of beam )
- std 9mm spacer
- MSL type BB18(DS)-1000 24cm x 8cm 3208-3/3208-21/3208-22
- std 9mm spacer
- MSL type BB7(DS)-1000 3542-13 ( approx central wrt BB18 )

bPlast cables screened 3M 1245 + Kapton film + drain wire
 bPlast cables currently floating
 bPlast driver PCBs disconnected

FEE64 aida06 adaptor PCB currently disconnected

ASIC settings 2023Nov16-18.55.20

BNC PB-5 pulser - not connected

DSSSD bias -150V -5.13uA - attachment 1

FEE64 temperatures Ok - attachment 2

All system wide checks OK

ADC data item stats OK - attachment 3
 Note *very* low rate in aida02 ( n+n Ohmic side )

p+n 1.8.W spectra - 20 us FSR - attachments 4 & 5
 
per FEE64 rate spectra - attachment 6

n+n 1.8.W spectra - 20us FSR - attachments 6 & 7


AIDA To Do

replace aida04
pulser walkthrough

Honeywell HSS-DPS sensor is faulty - attachments 1 & 2

Replace with Sontay Condensation Prevention Switch - attachments 3 & 4

Wiring

      Honeywell             Sontay
      V+(*) red             V+(*) red
      GND   blue            0V    blue
      COM   green           COM   black
      DRY   yellow          N/O   yellow

Honeywell V+ 24V ac/dc +/- 20%
Sontay V+ 24V dc +/-5%, 24V ac +/-10%

V+ measured as +16.5V dc with DMM

Interlock still not working

- V value too low ?
- Honeywell DRY not equivalent to Normally Open ?

This is a short list of things todo or check before the test beam time on 11.12.23 
Updated after 15:00 CET meeting

1. Replace water interlock
- Also allows testing of AIDA for 24h+ 

2. Decide on snout configuration: 1 or 2 BB18s (plus BB7 plus bPlastic)
  It is U so if we put 2 we could damage 2 instead of just 1 (of course we try to be careful)
  To decide which bPlas is installed (only 1 will be bothered): Upstream is preferred by HA
  Install Peter's light blocking frame between bPlastic and AIDA

3. Replace aida04 with a working FEE64
  Important as aida04 is in deadtime and not very useful

4. Investigate/replace aida06 
  Less urgent because 2 strips and runs with 0 dead time

5. If 2 BB18s, add another 8 working FEE64s to the system
  Note: Cannot do 2BB18s and 1BB7 (cannot power/cool 17 FEEs)

6. Test AIDA firmware fix for individual ASIC controls (especially if BB7<->AIDA will be tested)
  BB7<->AIDA will not be tested probably, as PCB will not arrive.
  Still good to check if possible

7. Decide on FEE to take pulser (assuming no distribution/inverter available)
  Test implant response with pulser and SC41 trigger?

Pulser LEMOs removed from p+n fees
Pulser connected to n+n fees: aida02 and aida04 
BNC PB-5 Polarity --> NEGATIVE

HV and FEE power up

Rates look similar to usual (Attachments 1 and 2)

Turn on pulser, see them in n+n spectra as expected  (attachment 3) 

Pulser run R6

See peaks in ADC spectra (attachment 4)

Remove pulser from aida02, left on aida04 with 50Ohm terminator 

AIDA powered off, HV off

> On ASIC settings page trynig to change the settings for one ASIC (e.g. ASIC1 of aida09) seems to cause all 4 ASIC settings to change
> 
> 1. Ensure act on all FEEs and act on all ASICs unticked
> 2. Change aida09 asic1 low_ref to 0x1 
> 3: Change to aida09 asic4
> 4: aida09 asic4 low_ref also changed to 0x1 

Variable dumps for ASIC and ASIC4

Connect pulser to all p+n FEEs

Turn on pulser, 100 Hz (attachment 3 for settings), rates OK (attachment 1)

1 minute at 10V.. 9V.. 1V (5X atten) 

Most FEEs OK (attachment 2), aida07 and aida08 weird?

FILE: PULSER21NOV23/R4

Check in S4, one pulser LEMO not in fully, reseat and try again

File R5... much better! (attachment 4)

On ASIC settings page trynig to change the settings for one ASIC (e.g. ASIC1 of aida09) seems to cause all 4 ASIC settings to change

1. Ensure act on all FEEs and act on all ASICs unticked
2. Change aida09 asic1 low_ref to 0x1 
3: Change to aida09 asic4
4: aida09 asic4 low_ref also changed to 0x1 

Connect the BB7 on top of the snout to the former aida05 (FEE above aida01)
Also remove copper busbar that is unused

Power on AIDA... rates terrible (attachment 1)

Reground AIDA stand to platform base ... small improvement but nothng major

Decide to power OFF, recheck all connections, aida02 ERNI maybe a bit loose, otherwise all good.
Remove BB7 to try to restore status quo ante

Power on again and rates much improved (attachments 2 & 3)
Looks similar to attachment 44 on Aida test 17/11/23
-> Back to status quo?


15:05 : BB7 put back on the snout and connected (ground + HV)
No significant change has been noticed (attachments 4 & 5)

Attach cables 14 to FEE that BB7 is connected - then will configure DHCP for aida09

Start up aida, configure as before. AIDA09 appears but is not configured (ASIC settings just copied from aida08 for now)

Rates on aida look OK still (attachment 6)

HV (attachment 7)

Temps (attachment 8)

03.20 c. 3k per spill 13N beam to S4
      Observe scatter of events at all energies for LEC

      Switch LE -> MEC
      aida02 & aida04 slow comparator 0xf -> 0x3 ( c.1.5MeV )
      All other ( p+n ) FEE64s slow comparator 0xa ( c. 5MeV )
      For c. 700MeV/u 14N + 6cm s.steel -> c. 350MeV/u 14N -> c. 30MeV energy loss in 1mm Silicon, c. 45MeV energy loss in 3mm plastic

      per n+n FEE64 1.8L spectra - attachment 1
      observe 3x peaks above threshold - different Z fragments?
      per FEE64 Stat spectra


04.10 DSSSD bias -150V leakage current -5.380uA - attachment 3
      FEE64 temps OK - attachment 4
      ADC data item stats - attachment 5
      per FEE64 Stat spectra - attachment 6
      per FEE64 1.8.L spectra - attachments 7-8
      per FEE64 1.8.W spectra - 20us FSR - attachments 9-10



05.03 aida02 & aida04 slow comparators 0x3 -> 0xa
      All spectra zero'd


c. 06.30 Beam tests end
         DAQ stopped. DSSSD HV OFF. AIDA power OFF.
      

AIDA ASIC settuings 2023Nov16-18.55.20
     low comparator p+n FEE64s 0xa, n+n 0xf

     BNC PB-5 settings
     amplitide 10.0V
     attenuation x10
     decay time 1ms
     polarity + ( connected to FEE64 aida01 only )
     frequency 22Hz
     tail pulse
     remote control

16.46 per p+n FEE64 1.8.W spectra - 20us, 200us, 2ms & 20ms FSR - attachments 1-4
      per n+n FEE64 1.8.W spectra - 20us, 200us, 2ms & 20ms FSR - attachments 5-8

      DSSSD bias -150V leakage -5.690uA - attachment 9
      RH 32.7% ambient 2+3.2 deg C d.p. +5.9 deg C
      FEE64 temps OK - attachment 10


     bPlast configuration
     1x long and 1x short side connected to 3x bPlast booster PCBs
     Rohde & Schawrtz HMP4040 PSU ch 4 +4V ( ref'd to PSU chassis ground ) 
     Mesytec SiPM bias
     Screens of flat cables from bPlast to booster cards electrically connected together and to bPlast NIM bin c( below AIDA stand ) chassis
     bPlast NIM bin and TAMEX electrically isolated from AIDA stand/DESPEC platform

     Photos - attachments 11-16

17.00 Connect SC21 L disc o/p fan-out -> ESN LA8000 TTl output -> BNC PB-5 pulser ext trig
      Should enable triggering ( and delay ) of pulser from heavy-ions in scintillator SC21


17.17 LEC/MEC selection 0x -> 0x1
      ADC data item stats - attachment 20
      per FEE64 1.8.W spectra - 20us FSR - attachments 18-19
      per FEE64 Rate spectra - attachment 17
      BNC PB-5 pulser to aida01 - some channels missing asic # 2, 3 & 4
      aida04 asic# 1 rates still high but aida06 ( was aida10 ) high rates  in only two channels of asic #4
      Otherwise system very quiet as expected for MEC ( 1GeV FSR ).

17.56 LEC/MEC selection 0x1 -> 0x0

22.10 NH starts data transfer to Merger and TapeServer ( no storage mode ). Date Relay to MBS also started - see attachments  21-25

22.18 aida04 asic #1 slow comparator 0xf -> 0xff
      aida06 asic #4 slow comparator 0xa -> 0xff
      Merger data transfer c. 500k data items/s



     

We restarted AIDA (a10277ttachment 6) this morning and checked rates (attachments 3/4) and waveforms (attachments 1/2). Temperatures are shown in attachment 5.
It seems consistent with what was observed yesterday.

AIDA stopped and platform moved.

The power cable from USB main power relay was connected to the wall and not the DESPEC 19" racks as expected. It has been corrected : it is now connected to the DESPEC 19" rack, has it should be.
AIDA was restarted after that. bPlast was disconnected from 2 booster cards.
We checked the rates (attachments 7,10 and 11 [linear scale]). They are quite similar, although aida01 rate has increased (maybe a cable issue), and rate from aida07 significantly decreased (it was really low yesterday as well).
The waveforms (attachments 8 & 9) are similar as the ones obtained earlier.

bPlast has been reconnected to all booster cards. Rate increased a little (attachment 12) but broadly similar to that observed first thing this morning.
Then 2 booster cards were grounded, and the rates went up (attachments 13-16)

Afterwards, one power cable was connected to the booster card on the short side, increasing the noise, as observed yesterday (attachments 17-20)
 
The Rohde Schwarz PSU output was referenced to PSU ground ( 3mm cable to ground socket front panel ). It did not reduced much the noise (attachment 21)
Finally, the power supply was switched on, increasing the noise in AIDA (attachment 22).


After the meeting, we have chosen to reconnect bPlast to the booster : now all LIMOs are connected to the booster cards, the cards are powered and the SiPM are biased. The alarm for the short side has triggered (not full bias)
The Rohde & Scwarz PSU outputs is till referenced to its chassis ground.
See attachments 23-26 for the rates and waveforms in AIDA


14.57 JG/JB added additional black cloth to reduce nPlast SiPM dark current : now it is around 16uA. Updated noise observations

per FEE64 1.8.W spectra 20us FSR - attachments 27-28
per FEE64 1Rate spectra - attachment 29
ADC data item stats - attachment 30

aida02 asics #2-4 remain noisy c. kHz/channel 
Most other p+n FEE64s are OK - the usual 'hot' channels but most other channel rates low 

15.07 JG removed ground reference for Rohde & Schwarz PSU +4V output to bPlast booster cards
      ADC data items atst - attachment 31
      Most FEE64s have significantly higher rates so the ground reference is doing 'something'

15.12 JG re-ground ref'd Rohde & Schwarz PSU +4V output to bPlast booster cards
      ADC data item stats - attachment 32 
      Rates for most FEE64s are reduced - some significantly - PSU ground ref is doing something reproducible 

15.25 Christoph Scheidenberger reports FRS magnets ON

16.01 JG/JB TAMEX & NIM bin electrically isolated from AIDA stand/DESPEC platform. Screens of flat cables from  bPlast to booster cards grounded to snout.
      ADC data item stats - attachment 33
      per FEE64 1.8.W spectra 20us FSR - attachments 36-37
      per FEE64 Rate spectra - attachments 34-35


16.20 TAMEX & NIM bin electrically isolated from AIDA stand/DESPEC platform. Screens of flat cables from  bPlast to booster cards now connected together but electrically floating

     ADC data item stats - attachment 40
      per FEE64 1.8.W spectra 20us FSR - attachments 38-39
      per FEE64 Rate spectra - attachment 41
      Noted improvement in most FEE64 rates - aida04 improved significantly


16.31 TAMEX & NIM bin electrically isolated from AIDA stand/DESPEC platform. Screens of flat cables from  bPlast to booster cards now connected together and grounded to NIM bin chassis.
      ADC data item stats - attachment 42
      per FEE64 Rate spectra - attachment 43-44
      per FEE64 1.8.W spectra 20us FSR - attachments 44-46
      Continued, imcremental improvement in FEE64 rates 

Screenshot uploads as I hit the 50 image upload limit.

Viewing AIDA status on Thursday morning 16/11/2023. 

Rates and histograms are observed with bPlast HV connected but not powered. The LIMO cables to the booster cards of bPlast are connected and the TAMEX crate is powered.

The following details the various tests of bPlast configurations and AIDA response:

1. The rates and status are the same as yesterday evening (15/11/2023) where we had the same configuration (bPlast connected to HV but not powered). (Attachment 1-3)

2. The rates and status are the same as in 1. when trying a different power supply but it is not turned on (Attachment 4-5). The R&S HMP4040 HV supply is a linearly regulated supply while the new supply is suspected to be switching regulated (?).

3. The rates and status are the same as in 1.,2. if the HV supply is connected. In fact they seem to increase when disconnecting the HV supply. (Attachment 6).

4. The rates and status are brought back to acceptable levels when disconnecting all the LIMOs of the bPlast booster board to TAMEX. (Attachment 7-8).

5. The rates and status are fairly worse when connecting a single LIMO (attachment 9) and when connecting the Mesytec module that powers the booster board (attachment 10).

6. The rates and status increase a little favourably when connecting a single LIMO to an odd numbered channel. (Attachment 11).

7. The rates and status are dramatically worse when connecting two LIMOs and a Mesytec module to the bPlast booster card. (Attachment 12).


The next tests will be dismounting the snout and trying to shield the bPlast ribbon cables with copper tape.

Tests resumed after lunch 14:00:00:

- The bPlast ribbon cables running to the booster boards were insulated with copper tape and kapton tape, and for the moment grounded freely with a tinned copper braid. A multimeter check of the ribbon cable showed that it is isolated from the snout as desired.

- Remounting the snout we found the following result on the AIDA rates and hit patterns (Attachment 15 & 16). The rates and hit patterns appear to be the same as it was before bPlast was mounted in the snout. The connector cable of AIDA01 was found to be broken for ASICs 1&2 (3&4 are still connected), and the noise on AIDA04 has increased slightly relative to previous tests.


8. The wave forms of the AIDA modules show regular structure. There are some high frequency 'beats' present in some of the AIDA modules (Attachment 13-14). The waveform of AIDA01 has the pulser signal (25 Hz), but has no noise as ASIC 1&2 is missing.

9. The next test carried out was that all the ribbon cables ground were connected to the separate grounds on the item frame and on the frame carrying the booster cards. The bPlast ribbon cables were also plugged into the booster board. (attachment 17-20).

10. The next test we connect all the ribbon cables to the same ground on the item frame and the ribbon cables were disconnected from the booster cards. (attachment 21 -24).

11. The test thereafter we connect all the grounds together but not grounded to anything, just floating in air. The ribbons were still disconnected from the booster cards. Rates were observed to decreased back to normal levels from the previous grounding configuration. (Attachment 25-28)

12. The final test carried out from the grounding tests was connecting the bPlast ribbon cables with floating air ground to the booster cards mounted around the snout. The rates and wave forms observed are back to normal and transience in some of the wave forms from (Attachment 20-28) have gone away after adjusting the LED and wave form capture threshold from 8900 -> 8000/8200. The rates and wave forms are back to the same point when we started the tests after lunch (Attachment 29-32).  

The next series of tests involved connecting and/or powering the bPlast HV and LIMOs individually to see their input to AIDA. Each of the tests were carried out individually, resetting back to the configuration from (Attachment 29-32, test 12.): 

13. The first test carried out was connecting a LIMO from the TAMEX card to the long side booster card of the bPlast. (Attachment 33-36). The rates, wave form and hit patterns seem to be dramatically affected by simply connecting 1 LIMO to the long side booster card.

14. The second test was connecting the HV supply of the booster card on the short side (right relative to the beam axis) and powering it with the R&S HMP4040 supply. Results are given by (Attachments 37-40). Rates, hit pattern and wave forms change and increase drastically.

15. The third test was simply connecting the booster card HV supply (R&S HMP4040) but not powering it at all. Results are given by (attachment 41-44). Simply connecting the HV supply is introducing a considerable amount of noise into AIDA. (Maybe grounding the supply, or changing its position relative to the DESPEC setup is a next possible test).

16. The fourth test was biasing the SiPMs on the short side booster card ie. right side of the bPlast with the Mesytec module 29.00 V @ 4 uA. The results are given by (attachment 45-48). The rates, hit patterns and wave forms return to more reasonable levels, however, it is clear that biasing the SiPMs is still introducing a great deal of noise into some of the ASICs based on the proximity. eg. aida03 ASIC1. 

17. The fifth and final test of the day was under-biasing the SiPMs of the long side of the bPlast with the Mesytec module 26.80 V @ 19 uA. The results are given by (attachment 1-4 in AIDA tests 16/11/2023 cont.). The rates, hit patterns and wave forms are the same as that which was carried out in test 16.


The tests wrap up with suspicion to the HV supply of the booster cards, whether it is grounded or not and its position in the setup. The grounding of the booster cards is also seen to affect AIDA substantially. Isolating and grounding the ribbon cables has proved to be helpful when biasing the SiPMs as the noise in AIDA is reduced in comparison to previous tests. The wave forms when connecting the HV supply seems to show a 100 kHz signal (HV supply cross-talk?).

11.36 Water flow, pressure & temperature ( 19 deg C ) OK

      Power ON


      Detector configuration - installed yesterday pm

      Extant ( May 2022 campaign ) snout
      1x MSL type BB18(DS)-1000 24cm x 8cm 'triple' DSSSD
      1x ( downstream ) bPlast

      2x additional Al foil sheets over end cap to ensure light tight ( zero dark current ) for bPlast
      Dark current c 0.4uA measured for extant 2x Al foil sheets only


      FEE64 configuration - aida01 - aida08
      aida02 & aida04 n+n Ohmic strips, other FEE64s p+n junction strips
      NH re-named FEE64s using dhcpd.conf - *no* changes to AIDA PSU cabling to FEE64s 


      All system wide checks OK

      DSSSD bias -150V leakage current -5.140uA - attachment 1
      FEE64 temps OK - attachment 2


      ASIC settings 2021Apr29-13-16-00
      Manually change ASIC settings aida06 & aida08 from - to + input

      BNC PB-5 pulser to aida08
      settings?

      Slow comparator 0x64 all FEE64s
      ADC data item stats - attachment 3

      Increased rates and noise cf yesterday's test https://elog.ph.ed.ac.uk/AIDA/916
      See attachments 4-9
      Per FEE64 Rate spectra
      Per FEE64 1.8.L spectra
      Per FEE64 1.8.W spectra - 20us FSR

12.10 Disconnected power cables(?) from 3x bPlast cards around AIDA snout 
      1x card hanging to side of snout - aida04 side, 2x resting on top of AIDA snout ( inserted 2 sheets folded A4 paper between AIDA snout and PCBs )

      Per FEE64 1.8.W spectra - 20us FSR - attachments 10 & 11
      Per FEE64 Rate spectra - attachment 12
      Significant improvement observed


      Slow comparators 0xa p+n FEE64s, 0xf n+n FEE64s
      pwer FEE64 1.8.W spectra - 20us FSR - attachments 13-15
      ADC data item stats  - attachment 16
      per FEE64 Rate spectra - attachments 17 & 18


14.16 Removed bPlast cards from around snout - small improvment ADC stats
      Attachments 19-22


15.10 aida01 FEE64 adaptor PCB re-seated ( c. 1 pin row out of position )

      ASIC data item stats - attachment 23
      Significant improvement which approaches previous noise performance


      CC now assembling bPlast adaptor cards on a standoff Minitek frame
      HA/IK have confirmed that bPlast cables are screened on one side only - CC demonstrated that surfaces of both sides of the bPlast cabling are non-conductive


      Once assembled ( cards + power cables + input cables to bPlast detector ), observed increased noise similar to that observed this am


      Attempt to return to status quo ante did not reduce noise but observed problems with aida01 ( asics #3 & #4 did not load ) - attachment 24
      An unusual error message - power cycled and rebooted FEE64s

      Slow comparator 0x64
      ADC data item stats - attachment 27

     Slow comparators 0xa p+n FEE64s, 0xf n+n FEE64s
     ADC data item stats  - attachments 26
     per FEE64 Rate spectra - attachment 25


     This appears to have ( largely ) restored status quo ante. Large number of hot channels but other typically close to previously observed rates.







      
      

Attempting to change the text string specifying the ASIC settings directory ( 2023Nov14-15.25.24 ) in Options produces an error - see attachments 1 & 2

System aida-gsi, anydesk 246 067 683

15.06 Quick test of AIDA 24cm x 8cm 'triple' DSSSD before dismounting to install 1x bPlast detector downstream of the DSSSD

      Water flow, pressure and temperature OK

      Power Up OK

      All system wide checks OK

      DSSSD bias -150V leakage current -5.29uA 

      ASIC settings 2021Apr29-13-16-00
      FEE64s re-configured to aida01 - aida08 by NH
      aida02, aida04 negative input, all other FEE64s positive input
      Currently unable to specify settings directory for Options so aida06 & auida08 are still defined as negative input FEE64s - need to change ASIC settings manually

      slow comparator p+n FEE64s 0x64->0xa, n+n FEE64s 0x64->0xf

      per FEE64 Rate spectra - attachment 1
      ADC data item stats OK - attachment 2
      p+n FEE64 rates dominated by 'hot' channels, other channels < 1Hz
      n+n FEE64 rates ~ 10Hz 
      Known issues with aida04 asic #1 and aida10 ( now aida06 asic # 4 ) remain to addressed/investigated

      No chnages in performance cf. https://elog.ph.ed.ac.uk/AIDA/906 & https://elog.ph.ed.ac.uk/AIDA/907


     

Analysis of tape folder /TapeData/BG18OCT23

Using Go4 https://github.com/cej25/DESPEC_NOV23

Figure 1: Hit pattern (XY)
Figure 2: Energy 1D Spectra, alpha peaks visible
Figure 3: Energy X vs Energy Y
Figure 4: 1D Strip (0-386 = X 0-386, 386-512 = Y 0-128) and Energy

Some gaps at 112-114, 121-128 = aida05 
Hot channels at 368, 381, 382 = aida06 (high rate seen)
Gap at 435-450 = aida04 (ASIC#4 which is faulty)

Generally 1-10 counts per strip, 1 ch wide gaps may be statistics or issues

Started AIDA at 1:41 pm, writing to disk: file BG18OCT2/R6, stopped at  17:26
pict1: HV supply
pict2: temperature
pict3: spectrum in stat, layout2
pict4: statistics

Started AIDA at 11:54am, writing to disk: file BG18OCT2/R5, stopped at 19:14

pict1: HV supply
pict2: temperature
pict3: spectrum in stat, layout2
pict4: statistics

pict5: sum spectra at 18:20 (3.4 hours)

system power off and unbiased

Started AIDA at 3:05pm, writing to disk: file BG18OCT2/R4, stopped 18.30

pict1: HV supply
pict2: temperature
pict3: spectrum in stat, layout2
pict4: statistics

pict5: sum spectra at 18:20 (3.4 hours)

system power off and unbiased

Started AIDA at 11:50, writing to disk: file BG18OCT2/R3, stopped around 3 pm

pict1: HV supply
pict2: temperature
pict3: spectrum in stat, layout2
pict4: statistics

Water Temp: 20 C - Flow felt on pipe
AIDA interlock OVERRIDE 

One USB Hub for the FEE64 TTYs was unplugged on cable tray, replugged in
 (may fix Pi_Monitor)

Bias DSSD (Ch 3) 
Leakage current stays at 17 uA during ramp up. At 150 V it quickly drops back to 6 uA
 Fig 1

Current FEE mapping
p+n aida09 aida01 aida10
    aida11 aida03 aida12

n+n aida02 aida04

Unused aida06 aida08

Due to merger need 8 FEEs 1-8 to merge properly will temporarily renumber for 1 DSSSD test
 - Will revert to this numbering for experiment!

Power up with unchanged configuration to test

Fee Temps OK Figure 2

Start DAQ at 0x64 threshold (1 MeV)
 Most channels 0 rate (expected)
 ASIC01 of AIDA4 very hot 
 2 channels in aida10 very hot
 Figure 3

Pulser OFF and only connected to aida11 aida03 aida12
 LOCAL operation at present 10V/10X level, positive tail, 25 Hz

STOP and Power off to renumber 

New mapping for now:

p+n aida05 aida01 aida06
    aida07 aida03 aida08

n+n aida02 aida04

aida09 ---> aida05
aida10 ---> aida06
aida11 ---> aida07
aida12 ---> aida08

-

Backup dhcpd.conf -> dhcpd.conf231019
Update to only first 8 fees
only turn on Relay 1

Update MIDAS Tcl
/MIDAS/config/TclHttpd/aidas-gsi@8015/startup.Tcl
list aida01... aida08

new folder
/home/npg/LayOut/GSI_triple_test_renumber

copy to /tmp

-

Reboot MIDAS and Power on Relay 1
Power OFF
Reboot dhcp!

Anydesk Connection Lost??

Make new DB key 2023Oct19-13.46.30
Copy aida01/CONTENTS (p+n) to aida06 and aida08 
Cannot update Options http://localhost:8015/AIDA/Options/Options.tml ? Error 500
Figure 4
Load settings manually and check-load ASIC
TODO: Manually change files, or?

GO

ADC items + rates figures 5, 6

Restart Merger
xfer Links (bad)
Netvar -> Inquire Registers
NetVar.MERGE.RunOptions WRITE 1

Merger now shows xfer Links => Merger
Merger GO

Open file BG18OCT23  R1

STOP DAQ
Data Xfer #1 Enable
GO DAQ

See merger links all GSI_triple_test_renumber
Enable output to data storage
xfer Links => Merger => storage

See tape rate: 3 MB/s (!)

Also start MBS on x86l-119 (new AIDA FDR) and try MBS relay
rate seen in MBS

Figure 8 - Accumulated statistics for ca 3 hours
 Figs 9, 10 - ADC spectra

System turned off and DSSSD biased down for end of work day, due to water issue

start 14.55

      ASIC settings 2021Apr29-13-16-00
      slow comparator 0xa ( all p+n junction FEE64s ) and 0xf ( all n+n Ohmic FEE64s )

      BNC PB-5
      amplitude 10.0V
      attenuation x10
      tail pulse
      decay time 1ms
      frequency 25Hz
      polarity -

      PB-5 output direct to aida02 *only*

      CAEN N1419ET non-floating outputs ( internal LK fitted )
      ch2 - polarity

      HV cable - standard coaxial cable to aida12 chained to aida03 & aida11
      chain ( Lemo-00 cables ) adaptor PCB gnd from aida09 to aida01 & aida10
      ground cable from aida04 adaptor PCB gnd to aida12, aida02 & aida09
      aida04 LK1 ( local gnd ) fitted
      aida03 LK3 fitted ( DSSSD PCB gnd )

      DSSSD bias -150V -6.510uA - attachment 1
      ADC data item stats - attachment 2
       p+n rates dominated by hot channels - most p+n channels < 1Hz/channel
       n+n rates c. 10Hz/channel 
       
      per FEE64 Rate spectra - attachment 3-5

      aida02 1.8.L pulser peak width 102 ch FWHM ( 70 keV FWHM )

      aida02 *.*.L spectra - attachments 6-9
       common x & y scales for all spectra - peak height proxy for peak width
       all channels have similar pulser peak widths 

      aida02 3.*.W spectra - 20us, 200us, 2ms & 20ms FSR - attachments 10-17


      per p+n FEE64 1.8.W spectra - 20us, 200us, 2ms & 20ms FSR - attachments 18-25

      per n+n FEE64 1.8.W spectra - 20us, 200us, 2ms & 20ms FSR - attachments 26-33


      DSSSD bias -150V -6.510uA - attachment 34
      ADC data item stats - attachment 35
       p+n rates dominated by hot channels - most p+n channels < 1Hz/channel
       n+n rates c. 10Hz/channel 
       
      per FEE64 Rate spectra - attachment 36-38

      aida12 1.8.L pulser peak width 56 ch FWHM ( 39keV FWHM )

      aida12 *.*.L spectra - attachments 39-42
       common x & y scales for all spectra - peak height proxy for peak width
       60 channels have similar pulser peak widths
       4 channels show peak widths c. 2x larger ( 'hot' channels )

      aida12 3.*.W spectra - 20us, 200us, 2ms & 20ms FSR - attachments 43-50

10.10 Water flow & temp OK
      Power ON

      All system wide checks OK


      ASIC settings 2021Apr29-13-16-00
      slow comparator 0x64

      BNC PB-5
      amplitude 10.0V
      attenuation x10
      tail pulse
      decay time 1ms
      frequency 25Hz
      polarity -

      PB-5 output direct to aida01 *only*

      CAEN N1419ET non-floating outputs ( internal LK fitted )
      ch2 - polarity

      HV cable - standard coaxial cable to aida12 chained to aida03, aida11, aida09, aida01 & aida10
      aida04 LK1 ( local gnd ) fitted
      ground cable from aida04 adaptor PCB gnd to aida12 & aida02
      aida03 LK3 fitted ( DSSSD PCB gnd )

      DSSSD bias -150V -6.300uA - attachment 1
      FEE64 temps OK - attachment 2
      ADC data item stats - attachment 3
       
      per FEE64 Rate spectra - attachment 4
       ignore aida06 & adida08 - not connected to anything
       ignore known issue of high rates aida04 asic #1 and aida10 asic #4 - remediable

      aida01 1.8.L pulser peak width 75 ch FWHM ( 53keV FWHM )

      1.8.W spectra - 20us FSR - attachments 5 & 6


10.35 slow comparator 0x64 -> 0xa ( all p+n junction FEE64s ) and 0xf ( all n+n Ohmic FEE64s )

      ADC data item stats - attachment 7
       
      per FEE64 Rate spectra - attachment 8-10

      p+n rates dominated by hot channels - most p+n channels < 1Hz/channel
      n+n rates c. 50Hz/channel 



      per p+n FEE64 1.8.W spectra - 20us, 200us & 2ms FSR - attachments 11-13
      per n+n FEE64 1.8.W spectra - 20us, 200us & 2ms FSR - attachments 14-16



12.10 HV cable - standard coaxial cable to aida12 chained to aida03 & aida11
      chain ( Lemo-00 cables ) adaptor PCB gnd from aida09 to aida01 & aida10 

      DSSSD bias -150V -6.535uA - attachment 17
      ADC data item stats - attachment 18
       
      per FEE64 Rate spectra - attachment 19-21

      aida01 1.8.L pulser peak width 78 ch FWHM ( 55keV FWHM )

      1.8.W spectra - 20us FSR - attachments 22 & 23



12.40 HV cable - standard coaxial cable to aida12 chained to aida03 & aida11
      chain ( Lemo-00 cables ) adaptor PCB gnd from aida09 to aida01 & aida10
      ground cable from aida04 adaptor PCB gnd to aida12, aida02 & aida09

      DSSSD bias -150V -6.535uA - attachment 24
      ADC data item stats - attachment 25
       
      per FEE64 Rate spectra - attachment 26-28

      aida01 1.8.L pulser peak width 61 ch FWHM ( 42keV FWHM )

      1.8.W spectra - 20us FSR - attachments 29-32


      aida01 *.*.L spectra - attachments 33-36
       common x & y scales - pulser peak height proxy for peak width
      aida01 3.*.W spectra - 20us FSR - attachments 37-39


     per p+n FEE64 1.8.W spectra - 20us, 200us, 2ms & 20ms - attachments 40-47

      CAEN N1419ET ch 2 - all outputs non-floating ( internal LK fitted )
      Standard coaxial HV cable chained to aida12, aida03, aida11, aida09, aida01 & aida10
      aida04 LK1 ( local gnd ) fitted

      ground cable from aida04 adaptor PCB ground to aida12 to aida02

      aida03 LK3 ( PCB gnd ) fitted

      BNC PB-5 
      amplitude 10.0V
      attenuation x10
      decay time 1ms
      polarity +
      frequency 25Hz


      test + direct from PB-5 to aida12 *only*

      slow comparator 0xf

      DSSSD bias -150V -7.280uA

      aida12 1.8.L pulser peak width 55 ch FWHM

      aida12 *.*.L spectra - attachments 1-4
      All channels have similar pulser peak widths to 1.8.L *except* 1.1.L, 1.4.L, 4.7.L & 4.13.L ( hot channels ) and 2.2.L, 2.9.L & 2.12.L no pulser peak



      test + direct from PB-5 to aida01 *only*

      aida01 1.8.L pulser peak width 70 ch FWHM

      aida01 *.*.L spectra - attachments 5-8
      All channels have similar pulser peak widths to 1.8.L *except* 1.1.L, 1.4.L, 4.7.L & 4.13.L ( hot channels )


      per FEE64 1.8.W spectra - 20us FSR - attachments 9-12
      per FEE64 1.8.W spectra - 200us FSR - attachments 13 & 14

10.00 Water flow & temp OK
      Power ON

      All system wide checks OK

      CAEN N1419ET ch 2 - all outputs non-floating ( internal LK fitted )
      Standard coaxial HV cable chained to aida12, aida03 & aida11
      aida04 LK1 ( local gnd ) fitted

      ground cable from aida04 adaptor PCB ground to aida12 to aida02

      aida03 LK3 ( PCB gnd ) fitted

      BNC PB-5 
      amplitude 10.0V
      attenuation x10
      decay time 1ms
      polarity -
      frequency 25Hz

      test + cable and test + chain removed
      test - direct from PB-5 to aida02 *only*

      DSSSD bias -120V -6.105uA - attachment 1

      FEE64 tempweratures OK - attachment 2

      slow comparator 0x64

      ADC data item stats - attachment 3
      Note 
       aida04 asic #1 u/s
        ASIC mezzanine to be replaced
       aida10 asic #4 v. high rates observed
        see https://elog.ph.ed.ac.uk/AIDA/901 attachment 45
        ASIC/cable/wafer issue ?

      rate ~ 1600Hz observed for aida02 - pulser
      All other rates 0Hz

      per FEE64 Rate spectra - attachment 4

      aida02 1.8.L pulser peak width 137 ch FWHM


      1.8.W spetcra 20us, 200us & 2ms FSR - attachments 5-10


      slow comparator 0x64 -> 0xf 

      ADC data item stats - attachment 11
      per FEE64 Rate spectra - attachments 12 & 13
       p+n rates entirely dominated by hot channels, otherwise rates ~0Hz
       n+n rates ~ 200-300Hz/channel

      slow comparator 0xf -> 0xa

      ADC data item stats - attachment 14
      per FEE64 Rate spectra - attachments 15-17
       p+n rates aida12, aida03 & aida11 entirely dominated by hot channels, otherwise rates ~0Hz
       p+n rates aida10, aida01 & aida09 ~500-1000Hz/channel
       n+n rates ~ 2000-3000Hz/channel

11.25 Extend HV chain from aida11 to aida09

      ADC data item stats - attachment 18
       significant decrease in aida09 rate

      1.8.W spectra 2ms FSR - attachments 19 & 20
       significant improvement in aida09 1.8.W noise

      aida02 1.8.L pulser peak width 165 ch FWHM ( slow comparator 0xa ), 127 ch FWHM ( 0xf )


12.00 Extend HV chain from aida09 to aida01 & aida10

      slow comparator 0xf

      ADC data item stats - attachment 21

      per FEE64 Rate spectra - attachment 22

      1.8.W spectra 2ms FSR - attachments 23-26
       significant improvement in aida01 & aida10 1.8.W noise

      aida02 1.8.L pulser peak width 127 ch FWHM ( 0xf )


12.35 slow comparator 0xf
      
      ADC data item stats - attachment 27
      per FEE64 Rate spectra - attachment 28




      slow comparator 0xa
      
      ADC data item stats - attachment 29
      per FEE64 Rate spectra - attachment 30



      slow comparator 0x9
      
      ADC data item stats - attachment 31
      per FEE64 Rate spectra - attachment 32 & 33



      slow comparator 0x8
      
      ADC data item stats - attachment 34
      per FEE64 Rate spectra - attachment 35



      slow comparator 0x7
      
      ADC data item stats - attachment 36
      per FEE64 Rate spectra - attachment 37



      slow comparator 0x6
      
      ADC data item stats - attachment 38
      per FEE64 Rate spectra - attachment 39



      slow comparator 0x5
      
      ADC data item stats - attachment 40
      per FEE64 Rate spectra - attachment 41



16.55 Background alpha 3*L & 3*W ( 20us FSR ) spectra - attachments 42 & 43
      Slow comparator 0xf
      Waveform threshold 7000 ( - polarity ), 9000 ( + polarity )

17.00 DSSSD bias -120V -7.125uA - attachment 44

      aida02 1.8.L ( n+n Ohmic side strip ) pulser peak width as function of DSSSD bias 

      Bias I_l    FWHM  Centroid
      (V)  (uA)   (ch)  (ch)
      -120 -7.125 124.8 43090
      -140 -7.230 124.5 43092
      -160 -7.370 120.2 43093
      -180 -7.570 120.0 43095
      -100 -7.020 143.8 43089
       -80 -6.820 continuum/no peak
      -150 -7.300 122.6 43093


      DSSSD bias -150V -7.280uA

      aida02 *.*.L spectra - attachments 45-48
      All channels have similar pulser peak widths to 1.8.L
 








      

09.38 Water flow & temp OK
      Power ON

      All system wide checks OK

      DSSSD HV +120V +5.585uA - attachment 1

      CAEN N1419ET grounded output ( internal LK fitted ) plus ThorLabs inline filter
      standard coaxial cable to aida04, no HV daisy chain aida12, aida03 & aida11
      aida03 LK3 fitted
      aida11, aida03, aida12 LK1 fitted

      test + & test - daisy chains removed

      FEE64 temps OK - attachment 2
      
      slow comparator 0x64
      ADC data item stats - attachment 3

      per FEE64 Rate spectra - attachments 4

      1.8.W spectra - 200us FSR - attachments 5-8



      test + to aida01 *only*

      ADC data item stats - attachment 9
      per FEE64 Rate spectra - attachment 10
      aida01 1*L spectra - attachment 11
       pulser peak width 1.8.L 141 ch FWHM


      ThorLabs inline filter removed
      ADC data item stats - attachment 12
      per FEE64 Rate spectra - attachment 13
       pulser peak width 1.8.L 136 ch FWHM



14.15 DSSSD HV +120V +6.610uA
      Disconnect aida01 ribbon cable drain wire from adaptor PCB gnd
       aida01 1.8.L pulser peak width 188 ch FWHM - amplitude/structure of noise does not change significantly but observe higher frequency components in addition
      1.8.W p+n spectra - 20us FSR - attachment 14


15.20 Switch from HV + to HV - N1419ET ch 3 to ch 2
      HV coaxial cable chain aida12, aida03, aida11, aida04 LK1 fitted 
      aida12, aida03 & aida11 LK1 removed
      Connect aida01 ribbon cable drain wire to adaptor PCB gnd
       
      DSSSD HV-120V -6.720uA - attachment 15
   
      ADC data item stats - attachment 16

       aida01 1.8.L pulser peak width 138 ch FWHM
 
      1.8.W spectra - 20us FSR - attachments 17 & 18

      Little observable difference between HV - and +, as expected

16.20 Jumper aida04 adaptor PCB gnd to aida12 adaptor PCB gnd

      slow comparator 0x64 -> 0xf

      ADC data item stats - attachment 20

      per FEE64 Rate spectra - attachment 21 & 24

      1.8.W spectra - 20us FSR - attachments 22 & 23
    
             aida01 1.8.L pulser peak width 99 ch FWHM


17.00 Ground cable from aida04 gnd to aida12 gnd

      ADC data item stats - attachment 25

      per FEE64 Rate spectra - attachment 26 & 27

      1.8.W spectra - 20us FSR - attachments 28 & 29
    
             aida01 1.8.L pulser peak width 97 ch FWHM


17.20 Ground cable from aida04 gnd to aida12 gnd to aida02 gnd

      slow comparator 0xf ~ 150keV

      ADC data item stats - attachment 30

      per FEE64 Rate spectra - attachment 31

      1.8.W spectra - 20us FSR - attachments 32 & 33
      1.8.W spectra - 200us FSR - attachments 32 & 33
    
             aida01 1.8.L pulser peak width  85 ch FWHM ~  65keV FWHM => 5s threshold 138keV 
             aida12 1.8.L pulser peak width  58 ch FWHM ~  44keV FWHM => 5s threshold  93keV
             aida02 1.8.L pulser peak width 133 ch FWHM ~ 100keV FWHM => 5s threshold 212keV

             Rate spectra are consistent with these estimates, i.e. observe ~zero rate for p+n channels ( except hot channels ) and low ( ~100-200Hz rate per channel ) for n+n channels

     p+n noise aida12, aida03, aida11 excellent
     for aida10, aida01 & aida09 good - can probably be improved to match aida12 etc
     significant improvement observed for n+n side

     aida12 *.*.W spectra - attachments 34-37

     per p+n FEE64 1.8.W spectra - 200us FSR - expanded scale - attachment 38

15.20 aida10 LK4 ( front f/p -> gnd ) fitted - investigate impact aida10 asic #4 edge channels
      DSSSSD HV bias +100V >+50uA
       breakdown MGR & Front F/P?
       wafer?
       cabling?

      aida10 LK4 removed
      DSSSD HV +120V +6.760uA stable - attachment 1

09.55 Water pressure and temp OK
      Power on

      All system wide checks OK

      DSSSD HV +120V +5.600uA - attachment 1

      CAEN N1419ET floating output
      standard coaxial cable to aida04, HV daisy chain aida12, aida03 & aida11
      aida03 LK1 & LK3 fitted

      test + & - daisy chains removed

      FEE64 temps OK - attachment 2
      
      slow comparator 0x64
      ADC data item stats - attachment 3

      per FEE64 Rate spectra - attachments 4-6

      1.8.W spectra - 20us & 200us FSR - attachments 7-10


11.00 CAEN N1419ET floating -> gnd output ( via internal LK )
      standard coaxial cable to aida04
      aida03 LK1 & LK3 fitted

      test + daisy chain removed, test - daisy chain aida02 - aida04

      DSSSD HV +120V +5.955uA - attachment 11

      slow comparator 0x64
      ADC data item stats - attachment 12

      per FEE64 Rate spectra - attachments 13 & 14

      1.8.W spectra - 200us FSR - attachments 15 & 16

      Overall, significant improvement in extrinsic noise for both p+n and n+n sides


      slow comparator 0xf
      ADC data item stats - attachment 17

      per FEE64 Rate spectra - attachment 18




11.50 LK1 fitted to aida12, aida03 & aida11

      DSSSD HV +120V +6.030uA - attachment 19

      slow comparator 0xf
      ADC data item stats - attachment 20

      1.8.W spectra - 200us FSR - attachments 21 & 22

      Incremental improvement in extrinsic noise for both p+n and n+n sides


12.20 LK1 fitted to aida12, aida03 & aida11, HV daisy chain aida12, aida03 & aida11 removed

      DSSSD HV +120V +6.125uA - attachment 23

      slow comparator 0xf
      ADC data item stats - attachment 24

      1.8.W spectra - 200us FSR - attachments 25 & 26

      Little observable difference

12.40 test - daisy chain removed

      slow comparator 0xf
      ADC data item stats - attachment 29

      per FEE64 Rate spectra - attachments 30 & 31

      1.8.W spectra - 200us FSR - attachments 32 & 33

      Further improvement in extrinsic noise observed for both p+n and n+n sides

14.00 additional ThorLab inline filter added to HV coaxial to aida04

      DSSSD HV +120V +6.505uA - attachment 34

      slow comparator 0xf
      ADC data item stats - attachment 35

      per FEE64 Rate spectra - attachments 36

      1.8.W spectra - 200us FSR - attachments 37 & 38

      Little observable difference

14.15 DSSSD HV +140V +6.685uA - attachment 39
      1.8.W spectra - 200us FSR - attachment 40

      DSSSD HV +160V +6.765uA - attachment 41
      1.8.W spectra - 200us FSR - attachment 42

      additional detector HV to dep+30V ( 160V ) mkaes little difference to n+n noise



14.45 per FEE64 4.*.W spectra - 200us FSR
      n+n aida02 aida04 - attachments 43 & 44
      p+n aida10, aida01, aida09 - attachments 45-47
      p+n aida12, aida03, aida11 - attachments 48-50

      aida09 missing strips? cable?
      aida10 large transients for edge strips

Slow comparator 0xf

DSSSD HV +120V +6.400uA - attachment 3

per FEE64 Rate spectra - attachment 1
ADC data item stats - attachment 2

test + disconnected at start of chain aida10, aida1 ... aida12

ADC data item stats - attachment 4
per FEE64 Rate spectra - attachment 5

No difference observed

DSSSD HV +130V +6.455uA - attachment 7
DSSSD HV +160V +6.605uA - attachment 6

per FEE64 1.8.W spectra - 2ms FSR - attachments 8 & 9
per FEE64 Rate spectra - attachments 10 & 11
ADC data item stats - attachment 12

Depletion+30V bias = 160V - no change to n+n noise, increased noise more generally


17.30 power off, HV off
      test + daisy chain removed from aida10, aida01 ... aida12
      power on
      slow comparator 0x64

      DSSSD bias +120V +6.455uA - attachment 13

      ADC data item stats - attachment 14

      per FEE64 Rate spectra - attachments 15 & 16
  
      1.8.W spectra - 20us & 200us FSR - attachments 17 & 18

      extrinsic noise worse but restricyted to a few hot channels
      
      slow comparator 0xf
      per FEE64 Rate spectra - attachment 19


18.40 DSSD HV to aida04 ( standard coaxial cable ), N1419ET floating output
      HV chain aida12, auda03, aida11 
      aida03 LK1 and LK3 fitted
      slow comparator 0x64

      DSSSD bias +120V +6.435uA - attachment 20
      ADC data item stats - attachment 21

      per FEE64 Rate spectra - attachments 22-24

      1.8.W spectra - 200us FSR - attcahments 25 & 26

       extrinsic noise worse esp. n+n Ohmic side
       p+n rates dominated by hot channels

12.22 USB-controlled ac mains relay - interlock overidden
      Water flow OK. Water temp 19 deg C OK.
      Power on.

      aida03 LK3 fitted

      test + chaine to all p+n FEE64s
      test - disconnected at EG&G Ortec 534 output and aida04 n+n FEE64 adaptor card

      CAEN N1419ET floating output
      Bias chain braid - aida11, aida03 & aida12, core aida04
      Bias +60V +5.28uA stable - attachment 1

      FEE64 temps OK - attachment 2

      1.8.W spectra - 200us FSR - attachments 3 & 4
      per FEE64 p+n 1.8.L spectra - attachment 5
       aida01 pulser peak width 240 ch FWHM

      Slow comparator 0x64

      per FEE64 Rate spectra - attachment 6
       p+n rates dominated by hot channels
      ADC data item stats - attachment 7

12.58 Bias +100V +6.075uA stable - attachment 8

     1.8.W spectra - 200us FSR - attachments 9 & 10
      per FEE64 p+n 1.8.L spectra - attachment 11
       aida01 pulser peak width 116 ch FWHM

      Slow comparator 0x64

      per FEE64 Rate spectra - attachment 12
       n+n rates dominated by hot channels, no p+n hot channels
      ADC data item stats - attachment 13

     1.8.W spectra - 20us FSR - attachments 14 & 15

     1.8.W spectra - 2ms FSR - attachments 16-19

     Observe 100kHz extrinsic noise with 5kHz modulation

13.22 Bias +100V +5.995uA stable - attachment 20

13.36 Bias +100V +6.040uA stable - attachment 25

     per FEE64 Rate spectra - attachment 21
       n+n rates dominated by hot channels, no p+n hot channels
      ADC data item stats - attachment 22

     slow comparator 0x64 -> 0xf

     per FEE64 Rate spectra - attachment 23
     ADC data item stats - attachment 24

13.36 Bias +110V +6.175uA stable - attachment 30

     slow comparator 0xf -> 0x64

     1.8.W spectra - 2ms FSR - attachments 26 & 27

     per FEE64 Rate spectra - attachment 29
      aida02, aida04 & aida10 rates dominated by hot channels
     ADC data item stats - attachment 28

13.36 Bias +120V +6.295uA stable - attachment 36

     slow comparator 0x64

     1.8.W spectra - 2ms FSR - attachments 33 & 34

     per FEE64 p+n 1.8.L spectra - attachment 31
      aida01 pulser peak width 120 ch FWHM

     per FEE64 Rate spectra - attachment 32
      aida02, aida04 & aida10 rates dominated by hot channels

     ADC data item stats - attachment 35


15.07 aida03 LK1 fitted
      Bias +60V +5.600uA stable
      Bias +100V +6.260uA stabl

      slow comparator 0x64

      1.8.W spectra - 2ms FSR - attachments 37 & 38

      per FEE64 p+n 1.8.L spectra - attachment 40
       aida01 pulser peak width 115 ch FWHM

      per FEE64 Rate spectra - attachment 39
       aida02, aida04 & aida10 rates dominated by hot channels

      ADC data item stats - attachment 41

      DSSSD HV - attachment 42




    per FEE64 Rate spectra - attachment 39
       aida02, aida04 & aida10 rates dominated by hot channels

      ADC data item stats - attachment 41



      


      
      

pi@raspberrypi:~ $ cat ./caen_screen.sh
if ! screen -list | grep -q "caenhv"; then
	screen -f -S caenhv /dev/ttyACM0 9600
else
	screen -x caenhv
fi


pi@raspberrypi:~ $ cat ./check_usbs.sh
#!/bin/bash

declare -A NAMEMAP


NAMEMAP[FTDI_Chipi-X_FT2LC9OO]="BNC PB-5 Pulser"
NAMEMAP[CAEN_SPA_NIM_Desktop_HV_Power_Supply]="CAEN HV Supply"
NAMEMAP[FTDI_USB__-__Serial]="CAEN NIM Crate"
NAMEMAP[FTDI_FT232R_USB_UART_A502KOX3]="AIDA PSU Relay"

#for sysdevpath in $(find /sys/bus/usb/devices/usb*/ -name dev); do     (         syspath="${sysdevpath%/dev}";         devname="$(udevadm info -q name -p $syspath)";         [[ "$devname" == "bus/"* ]] && exit;         eval "$(udevadm info -q property --export -p $syspath)";         [[ -z "$ID_SERIAL" ]] && exit;         echo "/dev/$devname - $ID_SERIAL";     ); done


for sysdevpath in $(find /sys/bus/usb/devices/usb*/ -name dev); do (
	syspath="${sysdevpath%/dev}"
	devname="$(udevadm info -q name -p $syspath)"
	[[ "$devname" == "bus/"* ]] && exit
	[[ "$devname" != *"tty"* ]] && exit
	eval "$(udevadm info -q property --export -p $syspath)"
	[[ -z "$ID_SERIAL" ]] && exit
	echo "/dev/$devname - $ID_SERIAL - ${NAMEMAP[$ID_SERIAL]}" )
done

09.45 Power up

10.15 Bias +60V +5.95uA

10.22 Bias +60V +5.60uA

10.21 Bias +100V +21.1uA unstable

10.27 Bias +80V +10.1uA unstable

10.37 Bias + 60V +5.70uA stable

11.02 Bias +60V +5.78uA stable

11.22 CAEN N1419ET floating output ( internal LK removed )
      Bias +100V +6.35uA

11.26 Bias +100V +10.59uA slowly increasing

11.39 Bias +100V +10.39uA unstable

      Slow comparator 0x64 observe high ADC data item stats for aida10 & aida12 - attachment 1 - expected rate 25Hz x 64 = 1600 - problem with this wafer and/or adaptor PCBs?  
      N.B. aida04 asic #1 is u/s and running at very high rates 
      N.B. rates in aida10 & aida12 dominated by a few hot channels ( not the usual suspects ) - attachment 2

12.00 Bias +100V +13.0uA unstable

12.20 Bias +100V 12.535uA unstable

15.00 DSSSD bias +60V +6.44uA - breakdown above c. 60V, bias +100V leakage current +20-30uA

      Slow comparator 0xa 

      aida03 LK3 fitted

      CAEN N1419ET grounded outputs
      HV#1 core aida04. braid aida10, aida1 & aida 9 

      BNC PB-5 
      Amplitide 10.0V
      Attenuation x10
      Decay time 1ms
      Polarity +
      Tail
      Frequency 25Hz

      test +/ test - daisy chains connected
      test - disconnected at EG&G Ortec 534 output

12.50 Power up

      All system wide checks OK

      per FEE64 p+n 1.8.W spectra 20us FSR - attachments 3-4
      per FEE64 p+n 1,8.L spectra - attachment 6
       aida01 pulser peak width 15 ch FWHM
      per FEE64 Rate spectra - attachment 5


      BNC PB-5 pulser
      Amplitude 10.0V
      Attenuation x10
      Decay 1ms
      Frequency 25Hz
      Polarity + ( n+n Ohmic test input from EG&G Ortec 534 Sum & Invert Amplifier not connected )
      Clamp ON

      ASIC settings 2021Apr29-13-16-00
      slow comparator 0x64


      FEE64 temperatures OK - see attachment 1
      ADC data item stats OK - see attachment 2

The Honeywell HSS-DPS dew point sensor indicator ( red LED ) is flashing c. 0.5Hz indicating humiidity > 90+/-3 %

Hanna HI9565 report d.p. 8.3 deg C, RH 36%, temperature 25 deg C

S4 area coolant water cntrols indicate water temperature 19 deg C. No evidence of condensation on AIDA coolant manifold.

Sensor fault?

12.54 Power up

      All system wide checks OK

      per FEE64 p+n 1.8.W spectra - attachments 5-10
       20us, 200us and 2000us FSR
      per FEE64 p+n 1,8.L spectra - attachment 3
       aida01 pulser peak width 15 ch FWHM
      per FEE64 Rate spectra - attachment 4


      BNC PB-5 pulser
      Amplitude 10.0V
      Attenuation x10
      Decay 1ms
      Frequency 25Hz
      Polarity + ( n+n Ohmic test input from EG&G Ortec 534 Sum & Invert Amplifier not connected )
      Clamp ON

      ASIC settings 2021Apr29-13-16-00
      slow comparator 0x64


      FEE64 temperatures OK - see attachment 2
      ADC data item stats OK - see attachment 1


      MSL type BB18 24cm c 8cm DSSSD 3208-3/-21/-22

      p+n junction side - 21 Ohm resistnace between bias pins
      n+n Ohmic side - 152 Ohm resistance between bias pins
 
      => all bias bond wires OK

17.00 USB-controlled ac mains relay - no water interlock ( yellow ) LED
      Water temperature ( station outside S4 entrance ) c. 19 deg C and pressure OK
      Flow can be felt on rubber outflow pipe from water manifold

      Failure of sensor or interlock box?

      *** Bypass interlock

16.58 Power ON

17.05 FEE64 temperatures OK - see attachment 


      All system wide checks OK

      per FEE64 p+n 1.8.W spectra - attachments 2-42021Apr29-13-16-00
      per FEE64 p+n 1,8.L spectra - attachment 5
       aida01 pulser peak width 15 ch FWHM
      per FEE64 Rate spectra - attachment 6 


      BNC PB-5 pulser
      Amplitude 10.0V
      Attenuation x10
      Decay 1ms
      Frequency 25Hz
      Polarity + ( n+n Ohmic test input from EG&G Ortec 534 Sum & Invert Amplifier not connected )
      Clamp ON

      ASIC settings 2021Apr29-13-16-00
      slow comparator 0x64

17.28 FEE64 temperatures - attachment 7
       all < 1 deg C difference cf. 17.05
      ADC data item stats OK - attachment 8

19.06 FEE64 temperatures OK - attachment 9

Noise test of CAEN N1419B in T9, STFC DL.

CAEN N1419B configured for floating output ( internal jumper removed ), +50V

DSO y: AC/1M x: 10us, 4us & 1us/div single shot/run 

Some HF noise transients observed but amplitude c. 5mV p to p.Noise otherwise appears to be white << 5mV rms.

Test of ( previously bench-tested OK ) AIDA ASIC mezzanines using FEE64 nnlycca5 ( MAC d8:80:39:41:d7:c3 )

AIDA test station STFC DL, T9 - see attachments 12-13

Pulser BNC PB-5

Amplitude 1.0V
Attenuation x1
Polarity +
Frequency 100Hz
Tail pulse, decay time 1ms
Delay 250ns (min)

ASIC settings 2021Jul12-14.50.48
Slow comparator 0x2f

Adaptor PCB - PJCS


FEE64 temperatures OK


Rate/HitRate spectra OK

LEC spectra OK
Data observed for all channels of all ASIC #1-4
Pulser peak widths *.8.L

Wave spectra OK
Data observed for all channels of all ASIC #1-4


Date/time          ASIC mezzanine          Pulser peak width   Status
                   serial #                (channels FWHM)
30.8.23 14:00      GOC-7226-1-11           13, 7, 11, 11       OK
30.8.23 15:15      GOC-7226-1-19           9, 7, 8, 8          OK      Rate, HitRate, *.*.L, *.*.W spectra ( 20us FSR ) - see attachments 1-11
30.8.23 16:00      GOC-7226-1-37           8, 7, 8, 7          OK
30.8.23 16:30      GOC-7226-1-39           6, 8, 9, 8          OK
30.8.23 17:00      0213110101-0029         9, 7, 8, 7          OK 
30.8.23 17:30      0216240101-0008         9, 7, 8, 7          OK

31.8.23 10:50      0216240101-0040         11, 8, 9, 8         OK
31.8.23 11:30      GOC-7226-1-31           9, 9, 9, 8          OK
31.8.23 11:50      GOC-7226-1-23           9, 8, 7, 7          OK
31.8.23 12:10      GOC-7226-1-34           8, 7, 8, 7          OK

31.8.23 13:55      0261690101-0040         8, 7, 8, 7          OK


0261690101-0002, 0261690101-0012 by AIDA test bench, T9   Mezzanine book 2 indicates that these FEE64s have been tested OK ( 03/08 ) with a FEE64

6x untested FEE64 mezzanines in AIDA cupboard, T9

Silena 7710 - see attachment 1

Bias -60V


Without ac mains filter - attachments 2-6 

DSO ch#1 AC/1M - y: 10mV/div x: 100ns, 200ns, 1us, 2us & 10us/div



With ac mains filter - attachments 7-11
( see https://elog.ph.ed.ac.uk/nToF/67 attachments 2 & 3 )

DSO ch#1 AC/1M - y: 10mV/div x: 100ns, 200ns, 1us, 2us & 10us/div


Conclusion - Claud Lyons Ltd STF Series Surge & Transient Power Filter makes little observable difference to HF noise transients observed

Silena 7710 - see attachment 1

Bias -60V

DSO ch#1 AC/1M - y: 20mV/div x: 100ns, 200ns, 1us, 2us & 10us/div  - attachments 2-6

BNC PB-4 - see attachment 1

Amplitude 35,000
Attenuators all OUT
Risetime 50ns
Decay time 1ms
Tail pulse
Polarity +
Frequency 2Hz (min)
Delay min

DSO ch#1 DC/1M - y: 5mV/div x: 100ns, 200ns, 1us, 2us & 10us/div  - attachments 2-6



BNC PB-5 - see attachment 7-9

Amplitude 1.0V
Attenuation x1
Decay time 1ms
Tail pulse
Polarity +
Frequency 2Hz (min)
Delay 250ns (min)

DSO ch#1 DC/1M - y: 5mV/div x: 100ns, 200ns, 1us, 2us & 10us/div  - attachments 10-14



BNC PB-5 - see attachment 15-16

Amplitude 10.0V
Attenuation x10
Decay time 1ms
Tail pulse
Polarity +
Frequency 2Hz (min)
Delay 250ns (min)

DSO ch#1 DC/1M - y: 5mV/div x: 100ns, 200ns, 1us, 2us & 10us/div  - attachments 17-21



Conclusion 

BNC PB-5 significantly noisier than BNC PB-4. Results consistent with GSI tests https://elog.ph.ed.ac.uk/AIDA/886 , i.e. AIDA BNC PB-5 pulser at GSI *not* faulty.
BNC PB-5 operation with 10.0V/10x ( cf. 1.0V/x1 ) shows lower level of noise but still worse than BNC PB-4.

5mV transient at test input ( C_t = 0.7pF ) = 3.5fC = 80keV Si equivalent ( check 1V x 0.7pF = 0.7pC = 16MeV OK ). 

Tests with the HV supply (CAEN N1419ET) and Pulse Generator ( BNC PB-5 ) in the detector lab on the crate behind the DEGAS detectors, carried out the 9th August 2023

Both modules were plugged

Test 1: pulse generetor on 2 Hz

- DC, 50 ohm - HV OFF - attachment 1

- DC, 50 ohm - HV OFF, Zoom on the noise - attachment 2

- DC, 50 ohm - HV 50 V, Zoom on the noise - attachment 3

Test 2: HV supply Channel 1 - CORE and 2 - BRAID, pulse generator still on

- AC 1 Mohm - HV OFF - attachment 4

- AC 1 Mohm - HV 50 V - attachment 5

No differences were observed between crate OFF, HV OFF and HV 50 V. An important periodic noise (green on the pictures) was observed and was significantly smaller when unpluging the HV module from the crate. The thickness of the baseline noise seems to be comparable to entry 882, attachment 33-35.

10.45 Power cycle and reboot

     DSSSD bias +100V leakage current +8.365uA

     All system wide checks OK

     Slow comparator 0x64

     per FEE64 rate spectra - attachment 1
     per FEE764 1.8.W spectra - attachments 16 & 17 ( ignore attachments 2 & 3 - bias off/low )
     adc data item stats - attachment 4


     slow comparator 0xf

     per FEE64 rate spectra - attachment 5
     adc data item stats - attachment 6


     slow comparator 0xe

     per FEE64 rate spectra
     adc data item stats - attachment 7


     slow comparator 0xd

     per FEE64 rate spectra - attachment 8
     adc data item stats - attachment 9


     slow comparator 0xc

     per FEE64 rate spectra - attachment 10
     adc data item stats - attachment 11

     slow comparator 0xb

     per FEE64 rate spectra - attachment 12
     adc data item stats - attachment 13


     slow comparator 0xa

     per FEE64 rate spectra - attachment 14
     adc data item stats - attachment 15

07.00 DAQ stopped
      Overnight run for background alphas

10.07 FEE64 temperatures OK - attachment 1
      DSSSD bias +100V leakage current +8.210uA - attachment 2

      Stats - attachments 3-12


     per FEE64 1.8.W spectra 200us FSR - attachments 21-22
     per FEE64 rate spectra - attachment 23

15.16 DSSSD bias +100V leakage current +8.415uA

      ThorLabs filters removed
      Test + & test - signals disconnected at outputs of BNC PB-5 and EG&G Ortec 534

      aida02 & aida04 LK1 installed, aida01 LK3 not installed
      aida03 LK3 installed

      test + & test- daisy chains installed

      HV daisy chain - core -  aida12, aida03, aida11
      HV daisy chain - braid - aida04


      slow comparator 0xa     p+n FEE64 rates high ( 50-125k ) 

      per FEE64 rates - attachment 1
      per FEE64 1.8.W spectra 200us FSR - attachments 2-3
      adc data item stats - attachment 4


      slow comparator 0xc    p+n FEE64 rates OK ( 15-40k ) dominated by 'hot' channels, low per channel rates in aida11, aida03, aida12

      per FEE64 rates - attachment 5-6
      adc data item stats - attachment 7


      slow comparator 0xf    p+n FEE64 rates low ( 7-17k ) entirely dominated by 'hot' channels

      per FEE64 rates - attachment 8
      adc data item stats - attachment 9


      slow comparator 0x14    

      per FEE64 rates - attachment 10-11
      adc data item stats - attachment 12


      slow comparator 0x19    

      per FEE64 rates - attachment 13
      adc data item stats - attachment 14


      slow comparator 0x1e    

      per FEE64 rates - attachment 15
      adc data item stats - attachment 16

      slow comparator 0x23    

      per FEE64 rates - attachment 17
      adc data item stats - attachment 18


     slow comparator 0x28    

      per FEE64 rates - attachment 19-20
      adc data item stats - aattachment 21


      Ignoring 'hot' channels, reduce rates to < 50Hz/channel for p+n slow comparator threshold 120-150keV and n+n slow comparator threshold 350-400keV 
      If we assume that this estimates the 5x sigma threshold => p+n sigma c. 27keV rms, 64keV FWHM and n+n sigma c. 75keV rms, 176keV FWHM

      Given FEE64-DSSSD cable lengths, optimal p+n performance is c. 40-50keV FWHM so current tests begin to approach this - little extrinsic noise observed for preamp signals
      We continue to observe significant ( though very much improved ) extrinsic noise for n+n strips so current noise performance could be improved by x2-3.



18.42 slow comparator 0x64
      stats & histograms zero'd

      DSSSD bias +100V leakage current +9.040uA

10.20 DSSSD bias +100V leakage current +6.565uA - attachment 1

      All system wide checks OK - attachments 2-7
       why is SYNC rollover target 0xe?

      FEE64 temps OK - attachment 8

      per FEE64 1.8.W spectra 20us FSR - attachments 9-10
      slow comparator 0x64
      per FEE64 rate spectra - attachment 11
      ADC data item stats - attachment 12

      slow compararator 0x14
      ADC data item stats - attachment 13



11.10 Test + & test - cables disconnected at the outputs of the BNC PB-5 and EG&G Ortec 534


      slow comparator 0xf                      p+n rates dominated by 'hot' channels *except* aida03 & aida09
      per FEE64 rate spectra - attachment 14
      ADC data item stats - attachment 15

      slow comparator 0xa                      p+n rates high ( 100-200k )
      per FEE64 rate spectra - attachment 16
      ADC data item stats - attachment 17


      slow comparator 0x14                      p+n rates entirely due to 'hot' channels
      per FEE64 rate spectra - attachment 18
      per FEE64 1.8.W spectra 20us FSR - attachments 19-20
      ADC data item stats - attachment 21


11.27 Remove ground cable from Al base plate to aida02 FEE64 adaptor PCB

      slow comparator 0xf                      p+n rates entirely due to 'hot' channels
      per FEE64 1.8.W spectra 20us FSR - attachments 22-23
      per FEE64 rate spectra - attachment 25
      ADC data item stats - attachment 24


      slow comparator 0xa                      p+n rates high ( 30-130k ) but lower than previously
      per FEE64 rate spectra - attachment 26
      ADC data item stats - attachment 27

11.48 DSSSD bias +100V leakage current +7.845uA

      Remove LK3 ( local HV ground middle Si wafer )

      slow comparator 0xa                      p+n rates high ( 55-135k ) but increase in rates appears to be due to 'hot' channels
      per FEE64 1.8.W spectra 20us FSR - attachments 28-30
      per FEE64 rate spectra - attachment 31
      ADC data item stats - attachment 32



      CAEN N1419ET ch #2 output connected to Tek TDS 210 DSO - powered from relay #6

      ch 1 - ac - HV braid
      ch 2 - ac - HV core

      ch # 2 OFF - attachment 33
      ch # 2 + 50V 0.000uA - attachments 34-35

      with additional ThorLabs filter
      ch # 2 + 50V 0.000uA - attachment 39


      ch 2 - dc, hi Z

      test -    attachments 36-37
      test +    attachment 38

12.45 Install ThorLabs filter HV core ( *no* filter for HV braid )

      slow comparator 0xa             p+n rates high ( 40-130k ) but p+n rates dominated by 'hot' channels *except* aida03, aida11, aida12 where rates are generally higher per strip
      per FEE64 rate spectra - attachment 40
      per FEE64 1.8.W spectra 20us FSR - attachments 41-42
      ADC data item stats - attachment 43
      


14.55 Install ThorLabs filter HV braid ( filters for both HV core & braid )

      slow comparator 0xa            p+n rates high ( 50-150k ) two filters probably somewhat worse than one filter
      per FEE64 rate spectra - attachment 46
      per FEE64 1.8.W spectra 20us FSR - attachments 44-45
      ADC data item stats - attachment 47


      Overall, effect of ThorLabs filters appears to belimited. Perhaps not unexpected as FEE64 adaptor PCBs also have a HV RC filter. 


      

16.22 Add LK1 to aida01
      DSSSD bias -100V leakage current -7.950uA

     Slow comparator 0x14
      per FEE64 1.8.W spectra 200us FSR - attachments 2-3
      ADC data item stats - attachment 4
      per FEE64 rate spectra - attachment 1

      Noise worse for n+n FEE64s esp. aida04

17.28 Ground Al base plate to aida02 FEE64 adaptor PCB - appears to be marginally worse than without ground

      per p+n FEE64 1.8.L spectra - attachments 8-9
       aida01 pulser peak width 116 ch FWHM
      per FEE64 1.8.W spectra 200us FSR - attachments 10-11
      per FEE64 rate spectra - attachment 6-7
      ADC data item stats - attachment 5

09.40 Al snout electrically connected ( < 1 Ohm ) to Al gasket and Al base plate
      Al snout electrically isolated ( > 20 MOhm ) from aida02 FEE64 adaptor PCB and AIDA support frame

      FEE64 temperatures OK - attachment 1
      DSSSD bias +100V leakage current +7.565uA - attachment 2

      All system wide checks OK

      Slow comparator 0x64
      per FEE64 rate spectra - attachment 3
      per p+n FEE64 1.8.L spectra - attachments 4-5
       aida01 pulser peak width 134 ch FWHM
      per FEE64 1.8.W spectra 200us FSR - attachments 6-7
      ADC data item stats - attachment 8

      Slow comparator 0x14
      ADC data item stats - attachment 9
      per FEE64 rate spectra - attachment 10




      Ground Al base plate to aida02 FEE64 adaptor PCB - appears to be marginally worse than without ground

      per p+n FEE64 1.8.L spectra - attachments 11-12
       aida01 pulser peak width 120 ch FWHM
      per FEE64 1.8.W spectra 200us FSR - attachments 13-14
      per FEE64 rate spectra - attachment 15
      ADC data item stats - attachment 16


11.48 DSSSD bias +100V leakage current +11.055uA

      Ground Al base plate to AIDA support frame - appears to be significantly worse than without ground

      per FEE64 1.8.W spectra 200us FSR - attachments 17-18
      per p+n FEE64 1.8.L spectra - attachments 19-20
       aida01 pulser peak width 150 ch FWHM
      per FEE64 rate spectra - attachment 21
      ADC data item stats - attachment 22


11.48 DSSSD bias +130V leakage current +35.05uA

      Ground Al base plate to aida02 FEE64 adaptor PCB - additional bias makes no significant difference

      per FEE64 rate spectra - attachment 23
      per p+n FEE64 1.8.L spectra - attachments 24-25
       aida01 pulser peak width 118 ch FWHM
      per FEE64 1.8.W spectra 200us FSR - attachments 26-27
      ADC data item stats - attachment 28



14.03 DSSSD bias +100V leakage current +10.7uA
      Ground Al base plate to aida02 FEE64 adaptor PCB - re-check
      per FEE64 1.8.W spectra 200us FSR - attachments 28-29
      ADC data item stats - attachment 30




15.10 Add DSSSD HV cable from aida04 to aida02 - significantly worse
      Ground Al base plate to aida02 FEE64 adaptor PCB - re-check
      per FEE64 1.8.W spectra 200us FSR - attachments 31-32
      ADC data item stats - attachment 33




15.37 Switch from - to + polarity detector HV
      N1419ET from ch #3 to ch #2, all outputs non-floating
      LK1 ( local HV ground )removed from aida12, aida03, aida11 - installed aida04 
      LK3 ( DSSSD PCB ground ) installed aida03 ( no change )
      HV #1 core aida12, aida03, aida11 - braid aida04
      test + chain aida9, aida01, aida10, aida12, aida03, aida11 - connected to BNC PB-5 pulser
      test - chain aida04, aida02 - not connected to pulser

      AIDA PSU cabling per https://elog.ph.ed.ac.uk/AIDA/879
      HV cable aida04 to aida02 - removed
      Ground Al base plate to aida02 FEE64 adaptor PCB - removed

      FEE64 temperatures OK - attachment 35
      DSSSD bias -100V leakage current -7.155uA - attachment 36

      Slow comparator 0x14
      per FEE64 rate spectra - attachment 37
      per p+n FEE64 1.8.L spectra - attachments 38-39
       aida01 pulser peak width 123 ch FWHM but note double peaking
      per FEE64 1.8.W spectra 200us FSR - attachments 40-41
      ADC data item stats - attachment 42
      Slow comparator 0x64
      ADC data item stats - attachment 43

      Very similar performance to + polarity DSSSD HV tests

      
16.05 Add LK1 to aida02
      DSSSD bias -100V leakage current -7.770uA

      Slow comparator 0x14
      per FEE64 1.8.W spectra 200us FSR - attachments 44-46
      ADC data item stats - attachment 47
      per FEE64 rate spectra - attachment 48

      Improved noise for n+n FEE64s esp. aida04

09.50 DSSSD bias +100V leakage current +9.255uA - attachment 2

      FEE64 temperatures OK - attachment 1

      All system wide checks OK

      per FEE64 1.8.W spectra 20 & 200us FSR - attachments 3-6

      per p+n FEE64 1.8.L spectra - attachments 7-8
       aida01 pulser peak width 87 ch FWHM

      adc data item stats - slow comparator 0x64, 0x14, 0xa - attachments 15, 14, 11
      per FEE64 rate spectra - attachments 9-10, 12-13


from https://elog.ph.ed.ac.uk/AIDA/872

13x FEE64s installed - see attachment 2 ( courtesy NH )

FEE64 #    Cable set #
1          1
2          2
3          3
4          4
5
6          6
7
8          8
9          9
10         5
11         11
12         7
15          

Change AIDA PSU cabling from

#1 1-3 2-4 5-6 7-8
#2 9-10 11-12 13-14 15-16

to

#1 1-3 2-4 5-7 9-11
#2 6-8 10-12 13-14 15-16

     DSSSD bias +100V leakage current +11.765uA

     per FEE64 1.8.W spectra 200us FSR - attachments 16-17

      per p+n FEE64 1.8.L spectra - attachments 18-19
       aida01 pulser peak width 158 ch FWHM ( note double peaking )

      adc data item stats - slow comparator 0x64, 0x14 - attachments 23, 21
      per FEE64 rate spectra - attachments 20, 22


     DSSSD bias +30V leakage current +35.8uA





13.35 DSSSD bias +100V leakage current +11.785uA

      aida04 34-way cable #1 connected to ASIC #1 & 2 disconnected from adaptor PCB

      per FEE64 1.8.W spectra 2000us FSR - attachments 26-27

      adc data item stats - slow comparator 0x64, 0x14 - attachments 29-30
      per FEE64 rate spectra - attachment 28


16.20 Install LK2 & LK4 aida12, aida03, aida11 ( front & rear field plate ground )

      DSSSD over current ( 200uA @ c. 30V ) - high resistance short?

      LK2 & LK4 installed aida12 *only* - OvC
      LK2 & LK4 installed aida11 *only* - OvC
      LK2 & LK4 installed aida3 *only* - OvC

      LK2 installed aida3 *only* - OvC ( LK2 = rear field plate )

      All front & rear field plate connections appear to provide a high resistance short to ground for detector bias. This may be related to issues observed biasing DSSSD via aida01 & aida09 - https://elog.ph.ed.ac.uk/AIDA/874
      But why does it affect aida12 too?