- Voltage-Current test of newly installed AIDA snout. Breakdown observed at around ~92 V. Probably caused my light leakage into the snout, will investigate further.

- Tried to cover the snout with a black cloth. This did not change the breakdown behaviour.

Snout assembly

DSSSDs

Upstream   3208-10/3208-18/3208-20
Downstream 3131-5/3131-10/3131-12

p+n junction side bias continuity checked OK for *all* wafers
 all c. 22 Ohm as expected

n+n Ohmic side bias continuity checked OK for both DSSSDs
 upstream 73 Ohm, downstream 92 Ohm

n+n Ohmic side bias wafer #2 
 positioned at top of snout assembly ( lower stage snout side marked 'T' )

p+n junction side faces downstream


Distances

Using top edge of lower stage snout as reference

ref - middle of upstream bPlas 8.0cm
ref - upstream DSSSD 11.0cm
ref - downstream DSSSD 12.0cm
ref - middle of downstream bPlas 14.0cm

Measurements consistent to +/-1mm between LHS and RHS of snout assembly as viewed from top side 


13.00 At this position the Kapton PCBs bulged in/out and there was some concern that when the upper stage
snout was installed it would the Kapton PCBs into the 'active' area. It was decided to move the 2x bPlas
and 2x DSSSDs c. 5mm downstream.

Jeroen and Phillip cut sections from 4x PEEK 6mm spacers so that they would clip onto 3mm dia support rods.

We raised the assembly fro the inter stage and inserted the modified spacers between the inter stage and 
the other spacers above. The Kapton PCBs now run fairly straight to the DSSSD connectors.

Distances re-measured as

Using top edge of lower stage snout as reference

ref - middle of upstream bPlas 8.6cm
ref - upstream DSSSD 11.5cm
ref - downstream DSSSD 12.4cm
ref - middle of downstream bPlas 14.5cm

Old ribbon cable assemblies - attachments 1  2

Length of cable from base of AIDA snout assembly to Samtec FFSD ribbon cable connectors

p+n junction side 10-11cm & 25.5cm
n+n Ohmic side 11cm & 25cm

Distance from Delron base of AIDA snout assembly to Samtec CLP connectors ( Kapton PCBs ) 51.5cm & 52.5cm



Manufacture of new ribbon cable assemblies - attachment 3

8x 2x 29" Samtec FFSD 34-way cables
8x 2x 23" Samtec FFSD 34-way cables


17.52 from Helena

"These are the detector positions within the snout:

Total snout length of 573 mm (380 mm bottom stage + 193 top stage), relative to the 'black flange' of the AIDA frame

Upstream AIDA @ 513 mm

Downstream AIDA @ 523 mm

This leaves 5cm space for the Downstream bPlast AND the BB7 layer together. I believe this should be enough space - can you all confirm for AIDA/bPlast/BB7 if this is 
agreed upon? It would be great to get a fast response so that we are ready for mounting tomorrow. If we need more space we could think of shifting everything upstream by 
10mm.

The upstream bPlast will need to go first such that the upstream AIDA is at 513mm. I don't have the measurements to hand to give the position."

12.30 FEE64 41:d7:cd ASIC mezzanine u/s, no data, ASIC temperature c. 20 deg C ( ambient ) low
      Replaced ASIC mezzanine with new ASIC mezzanine
      Installed as aida08

      Water temperature & pressure as measured outside S4 area - OK 

      Manually power FEE64s

      BNC PB-5 local control/ON
      Amplitude 1.0V
      Attenuation x10
      Polarity +
      tau_d 1ms
      Frequency 22Hz

      FEE64 temps - attachment 1
       aida02 with new ASIC mezzanine continues to ramp to c. 512 deg C - initially reads 0, next refresh c. 70 and third refresh c. 512 deg C
       aida02 Virtex and PSU temps OK, aida02 cooling plate ambient to touch

       aida08 ASIC temp c. 45 deg C as expected, Virtex and PSU temps OK

      All system wide checks OK

      WR timestamp OK - attachment 2

      aida04 ASIC settings - attachment 3

      ADC data item stats OK - attachment 4
   
      aida04 Rate spectrum - attachment 5

      aida04 *.*.L spectra - attachments 6-9
       1.8.L pulser peak width 13 ch FWHM

      aida04 1.8.W spectra - 20us FSR - attachment 10-11

17.00 FEE64 41:a0:71 ASIC #2 u/s
      Replaced ASIC mezzanine with new ASIC mezzanine
      Installed as aida04

      Unable to boot nnrpi2 - manual/local control of BNC PB-5 and FEE64 PSU - no interlock

      Water temperature & pressure as measured outside S4 area - OK 

      Manually power FEE64s

      BNC PB-5 local control/ON
      Amplitude 1.0V
      Attenuation x10
      Polarity -
      tau_d 1ms
      Frequency 22Hz

      FEE64 temps OK - attachment 1

      All system wide checks OK

      WR timestamp OK - attachment 2

      aida04 ASIC settings - attachment 3

      ADC data item stats OK - attachment 4
   
      aida04 Rate spectrum - attachment 5

      aida04 *.*.L spectra - attachments 6-9
       1.8.L pulser peak width 15 ch FWHM

      aida04 1.8.W spectra - 20us FSR - attachment 10-11

      MIDAS configuration - attachment 12

      DHCP config - attachment 13



18.30 FEE64 41:f6:b7 ASIC #1 u/s
      Replaced ASIC mezzanine with new ASIC mezzanine
      Installed as aida02

      All system wide checks OK

      FEE64 temps - attachment 14
       aida02 ASIC temperature c. 512 deg C !
       PSU/Virtex temps OK
       Mezzanine ambient to touch - assume faulty sensor/poor connection?

      aida02 ASIC settings - attachment 15

      WR timestamp OK - attachment 16

      ADC data item stats OK - attachment 4

      aida04 Rate spectrum - attachment 18

      aida02 1.8.W spectra - 20us FSR - attachment 19-20

      aida02 *.*.L spectra - attachments 21-24
       1.8.L pulser peak width 16 ch FWHM


19.30 Power OFF



     

First pass analysis of data file /TapeData/DEC23/R9_6

 *** TDR format 3.3.0 analyser - TD - May 2021
 *** ERROR: READ I/O error:       5002
                   blocks:      32000
          ADC data format:  234532726 (   99567.1 Hz)
        Other data format:   27387282 (   11626.8 Hz)
 Sample trace data format:          0 (       0.0 Hz)
         Undefined format:          0 (       0.0 Hz)
   Other data format type:      PAUSE:         53 (       0.0 Hz)
                               RESUME:         53 (       0.0 Hz)
                              SYNC100:      40775 (      17.3 Hz)
                              WR48-63:      40775 (      17.3 Hz)
                           FEE64 disc:    2928025 (    1243.0 Hz)
                             MBS info:   24377601 (   10349.1 Hz)
                           Other info:          0 (       0.0 Hz)

   ADC data range bit set:     287073 (     121.9 Hz)

                Timewarps:        ADC:          0 (       0.0 Hz)
                                PAUSE:          0 (       0.0 Hz)
                               RESUME:          0 (       0.0 Hz)
                              SYNC100:          0 (       0.0 Hz)
                              WR48-63:          0 (       0.0 Hz)
                           FEE64 disc:          0 (       0.0 Hz)
                             MBS info:          0 (       0.0 Hz)
                            Undefined:          0 (       0.0 Hz)
                         Sample trace:          0 (       0.0 Hz)

 *** Timestamp elapsed time:     2355.524 s

 *** Statistics
 FEE  ADC Data Other Data     Sample  Undefined      Pause     Resume    SYNC100    WR48-63       Disc        MBS      Other   HEC Data
  0   59013868     372005          0          0         20         20       9888       9888     281563      70626          0      55467
  1   31445079    1098714          0          0          2          2       5017       5017     243009     845667          0      38876
  2   22895499   11841669          0          0          1          1       5294       5294     482655   11348424          0      42748
  3   18228498   11705354          0          0          0          0       3913       3913     416619   11280909          0      78526
  4   25500772    1237178          0          0          3          3       4320       4320     396557     831975          0      28918
  5          4          0          0          0          0          0          0          0          0          0          0          0
  6   15933921     394210          0          0          0          0       2560       2560     389090          0          0      11489
  7   61515085     738152          0          0         27         27       9783       9783     718532          0          0      31049

FEE64 configuration https://elog.ph.ed.ac.uk/AIDA/935


Note

- aida06 not connected to DSSSD ( cabling broken  - will be replaced later this week )

- LEC ( 20MeV FSR ) data ADC offset corrected 
   ADC offsets available for 489 of 512 channels and are included in the analysis - 23 strips for which no ADC offsets could be calculated ( usually because there was 
no 
pulser data ) are not included in analysis 
- LEC ( 20MeV FSR ) front-back strip energy difference cut +/- 50 channels ( c. +/- 280keV )
- HEC ( 2GeV FSR ) front-back strip energy difference cut +/-200 channels ( c. +/- 1120MeV )

- LEC ADC data: 13 < channel < 188 ( c. 73-1053keV )
- HEC ADC data: > 13 channels ( c. 73MeV )
- FEE64 hardware thresholds: LEC c. 100keV, HEC c. 200MeV 




Attachments 1 & 2 - per pixel HEC-LEC event time difference spectra - 4.096us/channel

Attachments 3 & 4 - per pixel HEC-LEC event time difference spectra - 65.536us/channel

Attachment 5 - DSSSD x-y hit pattern: HEC-LEC event time difference < 4.3s
 Majority of events associated with 'hot' p+n junction strips - few plausible decay candidate events - as expected.
 z-scale - semi-logarithmic - scattered events are single counts ( blue )
 1 count => rate ~ 1/2355s ~ 0.0004Hz, the great majority of pixels have zero counts

Attachment 6 - LEC ( decay ) and HEC ( implant ) events - 262.144us/channel ( 65536 channels = 17.2s ) 

HEC implants channels 12000-25000 = 216 counts => HEC rate ( in spill ) 63.4Hz
LEC decays channels 12000-25000 = 3865 counts => LEC rate ( in spill ) 1134.1Hz
LEC decays channels 25000-38000 = 2790 counts => LEC rate ( inter spill ) 818.7Hz

Attachment 7 - per pixel HEC-HEC event time difference spectra - 4.096us/channel

Attachment 8 - per pixel LEC-LEC event time difference spectra - 4.096us/channel

Attachment 9 - variables.dat
This is a ( Fortran ) Namelist I/O data file containing of the ADC offsets, FEE64 configuration, LEC and HEC energy difference windows 

The ADC offset channel number is calculated as

channel = channel_ident + ( module * 64 ) where module = 0-7 corresponding to AIDA FEE64s aida01-aida08

and is used as follows

ADC data = INT ( RSHIFT( ABS( 32768 - data( i ) ), 3 ) - offset( i ) + 0.5 )

where data(i) is the ADC data item for channel i, offset(i) is the ADC offset for channel i

An ADC offset of -9999 means there was no pulser data for this channel in data files R5 and R11.

               

Attachment 1 - 4 socket input connectors ( from sensor to interlock box )

Attachment 2 & 2 - 24V dc relays and internal wiring

Attachment 4 - 3 socket input connector ( from interlock box to USB-controlled ac mains relay )

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

FEE64 configuration see https://elog.ph.ed.ac.uk/AIDA/872 attachment 2

Bias -150V -6.590uA ambient temperature +24.7 deg C d.p. +13.7 deg C RH 50.3%

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

PB-5 output direct to p+n junction side FEE64 aida01 or aida12, or n+n Ohmic side FEE64 aida02


aida01 1.8.L pulser peak width  61 ch FWHM ~  46keV FWHM => 5s threshold 98keV 
aida12 1.8.L pulser peak width  56 ch FWHM ~  42keV FWHM => 5s threshold 89keV
aida02 1.8.L pulser peak width 102 ch FWHM ~  77keV FWHM => 5s threshold 163keV


slow comparator  0xa 100keV ( all p+n junction FEE64s ) 
                 0xf 150keV ( all n+n Ohmic FEE64s )

per FEE64 Rate spectra - attachment 1
 p+n FEE64s ( aida010, aida01, aida09, aida12, aida03, aida11 ) rates dominated by hot channels, other channels typically <1Hz ( 25Hz pulser to aida12 )
 n+n FEE64s ( aida02, aida04 ) rates ~ 10-20Hz/channel
 Note aida06 and aida08 are not connected to anything and should be ignored


ADC data item stats - attachment 2


For further information see https://elog.ph.ed.ac.uk/AIDA/906 and https://elog.ph.ed.ac.uk/AIDA/907


To Do

- repair/replace Honeywell HSS-DPS dew point sensor
   USB-controlled ac mains relay interlock currently overrriden
   do NOT operate AIDA unattended

- aida04 asic #1 u/s - replace ASIC mezzanine

- electrically isolated test signal distribution box req'd

- aida10 asic #4
   v. high rates observed and large signal transients 
   cause unclear ... ASIC/adaptor PCB/cabling/Si wafer ?

- extended background alpha run to check all DSSSD bond wires
   pulser OFF
   slow comparator 0x64

- bPlas + 2x triple DSSSD + bPlas stack assembly and test

- all up, in beam test

The photographs show the cooling water controls and temperature/pressure gauges outside S4 and the connections used by AIDA within S4.

The AIDA MBS FDR will be x86l-119 from now on, not x86l-94

the MBS relay and startup scripts will be changed for this

There was a power failure in the morning of 24.08.2023 in the Rhein-Main area affecting GSI

The Aida workstation (aida-3) has been restarted, it is unknown if the Pis in S4 rebooted as well (there is a UPS)

29.8.23 TD Both RPi systems rebooted four days ago.

Firefox browser proxy setting changed to 'Auto-detect proxy settings for this network' ( Firefox -> Edit -> Settings -> Network Settings -> Settings )

When using the VETAR connected to the HDMI port of the root MACB the settings for all the MACB in the system 0x3.

This setting takes the Clock and Data line from the input HDMI and outputs it via teh HDMI output ports.

When using the Emulator connected via the SMA connectors on the back of the root MACB then the setting for the root MACB should be 0xD and all others should be 0x3.

Attached is the .jed file for programming the MACB and the .vhd source file to help with understanding of the settings.

The AIDA NIM crate, pis and workstation have been powered off for the Christmas break and will not be accessible

Investigating AIDA noise with a TA041 differential probe and oscilloscope 

AC Mains (DESPEC platform AC, L-N)
Probe attentuation = 1:100

Fig 1: Main AC waveform [X: 5ms/div, Y: 100 V/div]
Fig 2: Zoomed in at peak (20 V FSR, any less and the waveform clipped) [X: 10us/div, Y: 20V/div]
Fig 3: Longer time base and FFT of 0-5 MHz. No significant frequency harmonics noticed [X: 5ms/div, Y:20 V, FFT X: 500 kHz/div, Y: 10 dBm/div]

No significant noise or distortion present, fully within any AC specification. 
Note that at the moment there is almost no load on AC
Equipment on on DESPEC rack: AIDA NIM, AIDA Raspberry Pis, bPlas PC (+ WR) + 2x DESPEC NIM crates
 No autofill, VME crate or detectors
All big machines at GSI (SIS, FRS) off (suspect pumps are on)

Ion catcher not on (I think under repair)

-

FEE PSU studies
Probe connected to 5V exposed power pin on FEE64 (+v) and to grounding crimp on FEE64 (-v)
No adapter board connected
Attentuation = 1:10


Fig 4: FFT when FEEs are *off* - essentially probe+scope noise [X: 5ms/div, Y: 100 mV/div, FFT: X: 500 kHz/div, Y: 10 dBm/div]
Fig 5: FFT when FEEs are *on* - notice 1.4 MHz peak in FFT, also seen on ADC waveform readout before (fig 6) [X: 5ms/div, Y: 100 mV/div, FFT: X: 500 kHz/div, Y: 10 dBm/div]

Fig 7: 500 ns/div 5V output on FEE, single FEE on the PSU [X: 500 ns/div, Y: 100 mV/div]

Note average max voltage is 5.31 V (power on) and ~ 70 mV "peak to peak" -might be from probe/scope?

Also see voltage changes with FEE power draw:

Power on  : 5.45 V (different scale to above)
SETUP ran : 5.51 V 
FADCs off : 5.86 V
ACQ Go:   : Unchanged; ASIC threshold 0xa: Unchanged

Also check situation on a fully loaded PSU (8 fees connected and powered on)

Power on:   5.29 V (fig 8)
SETUP ran:  5.36 V (fig 9)
FADCs off:  5.64 V (fig 10)

All X: 500 ns/div, Y: 100 mV/div

Both cases observe voltage rises as current draw drops (as expected for voltage drop along a cable)

Noise on 'scope seems to get slightly worse with reduced current (and higher voltage)

No sign of strong 100 kHz noise as seen in ADC traces beforehand

Todo:

- Check -6V and 7V rails
- Check 5V and noise when front-end card is added and pulser/HV connected
- Check between two FEE64 grounds 
- Check direct out of PSU vs ground to see if 1.4 MHz appears on PSU side or FEE64 side

-
11.10.22 Updates

Attachement 11 - 5V PSU on upper PSU with no FEEs attached whatsoever. No 1.4 MHz (on FFT) but clear low frequency beats from switching - presumably low/no load behaviour

Attachement 12 - 5V PSU on aida12 with 8 FEEs on PSU. Longer time base to allow lower frequencies in FFT. 1.4 MHz switching spikes visible but nothing around 100 kHz region

Attachments 13-16: 5V PSU on aida12 at 20 mV/div vertical and 1, 0.5, 2, 5 us/div horizontal respectively

12.10.22 Updates

Attachment 17: -6V PSU on aida12 with 8 FEEs on PSU. 2 us/div timebase. 20 mV/div amplitude
Attachment 18: 10 ms timebase and FFT
Average voltage: -6.21 V

Attachment 19: 7V PSU on aida12 with 8 FEEs on PSU. 2 us/div timebase. 20 mV/div amplitude
Attachment 18: 10 ms timebase and FFT
Average voltage: 7.46V

Measurement between AIDA12 ground and Reference ground/copper bar
+ve (red probe) attached to copper bar at ground point (not strong connection at present)
-ve (black probe) attached to ground crimp on aida12 (connected to cooling plate)
aida12 no adapter board connected: connections are PSU, Ethernet, HDMI and TTY only

Attachment 21: 5 us/div 100 mv/div waveform, big oscillations present. Not seen before FEEs turned on (8 FEES, 1-7+12)
Attachment 22: 10 ms/div for FFT, sharp peak at exactly 100 kHz observed...


Attachment 23: Between 5V PSU (+ve) and 19" rack (-ve) with  no FEEs connected to PSU
 See strong 100 kHz oscillations too, note that voltage isn't 5V as PSU is floating w.r.t. ground
 Looks to be common mode noise (on both 5V and Return of PSU)

Attachment 24: Same as 21 but using thick crocodile clips on probe to ground and aida12. Noise is attenuated but still present

There are three Merger statistics that can be used to better understand how the data flow through the Merger system is proceeding.

Two are from the Link task and one is from the Merger.They are all "No data buffers avaliable" with #1, #2, #3 at the end.

#1: This is incremented when the Link task has a data item to put in the queue for the Merge process but there is no room.

#2: This is incremented when the Link task has found no room in the queue for the Merge process ( #1 ) , waited , tried again and failed. 

#3: This the other end of the queue. When the Merge task requests a data item from a Link task queue and there is nothing available.

The proxy in Firefox, Yum and AnyDesk has been changed as the old wasn't working

proxy.gsi.de port 3128 is now in use

Startup AIDA with ribbon cable connected to aida03 and aida07 for noise

Setup and run with waveforms enabled. Discriminators ADC power etc as default

Try to push above 200k as this is where we saw issues before... lowering threshold to 0x3 pushes rates to

aida03 - 320k
aida07 - 254k

Startup merger and observe rates

aida03 - 224k
aida07 - 213k

Rate drop observed as before.

Now update aidacommon to point to AidaExecV10 and powercycle FEEs

Rates again with 0x3 

aida03 - 315k
aida07 - 252k

Restart with data transfer ON

aida03 - 317k
aida07 - 262k

No errors in merger terminal or "Merge time errors" statistic

Will keep running 

The second switch was moved back to CARME so AIDA has been configured back to using a single switch

aida02/aida04/aida06/aida08 updated back to first switch as per https://elog.ph.ed.ac.uk/DESPEC/433

Additionally a ribbon cable is attached to aida01 and aida05 to introduce some noise into the system