Summary of the day:
Small improvements were made throughout the day but by far the biggest change to the rate in the FEEs came from disabling the waveforms
This was done by setting ADC con

Initial jumper configuration:
FEE LK
1   2 4
2   1 2 4
3   2 3 4
4   2 4
5   2 4
6   1 2 4
7   2 3 4
8   1 2 4

13:22 LK2, 3 and 4 on all p+n - attachment 1

14:20 AC mains relay connected to AC voltage stabilisers + on separate mains socket from DESPEC - attachment 2
      Same configuration but waveforms disabled (p+n improvment) - attachment 3
      Layout 1 - attachment 4

14:32 all FEE power cables moved to PSU 2 (Lower one in rack, upper one was slow to start for 1 FEE pair, likely the 5V slow to start)
      Previously all FEEs on their own pair within  a psu
      New order 1,3 2,4 5,7 6,8
      Waveforms on - all bad - attachment 5
      Waveforms off - all p+n better - attachment 6

14:54 interlock removed from AC mains relay
      Also noticed adaptor board on 2 not in fully -> Now in
      p+n generally better - attachment 7
      Without waveforms - p+n better again - attachment 8

16:04 Platform moved into position
      Interlock power cable removed from extension lead
      w/ waveform - p+n slightly worse
      w/o waveform - p+n same as beffore

16:14 LK3 removed from 1 and 5
      w/ waveform -> p+n slightly worse - attachment 9
      w/o waveform -> p+n best yet - attachment 10

16:33 LK1 wasn't on all n+n was only on 2, 6 and 8
      Removed from 6 -> only one LK1 per DSSD
      w/ waveforms - all bad - attachment 11
      w/o waveforms - no change - attachment 12

16:59 LK1 removed from 2->4 This is the FEE with the BIAS braid
      w/ waveform p+n better - attachment 13
      w/0 waveform p+n better, n+n worse? - attachment 14

17:21 Bias filters added to n+n
      w/ waveform - no change - attachment 15
      w/o wwaveofrm - P=n worse - attachment 16
      Stats 0x21 - attachment 17
      Stats 0x14 - attachment 18
      Stats 0x12 - attachment 19

17:42 Bias filter removed and bias floated (LK1 removed)
      w/ waveform all worse - attachment 20
      w/o waveform -> p+n worse, n+n similar

18:29 LK1 back on 4+8
      w/ waveform -> poor
      w/0 waveform - recovered previous - attachment 20


18:32 LK 2 and 4 removed from 2 +6
      Also noticed ground lemo on aida02 not fully inserted which has been corrected
      w/ waveform poor - attachment 21
      Threshold 0xF - attachment 22
      w/o waveform - attachment 23

All MIDAS files for S450 (/TapeData/S450) have been copied to lustre and archived 

Remove Caen HV Supply

Open up, C23 was grounded (HV grounded in NIM)
Remove C23 (HV floating at NIM) and reinstall

Rebias HV... No Change

Reboot AIDA... No change

Probe PSU output with 'scope again and 10X probe

Use a AC mains scope as was available, means referenced to ground of AC, but should be ground of platform (and hence Fee64)

Figs 1-3: Traces of PSU outputs (5V, -6V, 5V Return) with 10X probe, 1 MOhm impedance AC coupled 
          Lots of fluctuation and jitter

Figs 4-6: DC 1MOhm output from all 3 power rails 

Fig 7-8: Small "loop" using probe and observed scope spectra.

After lunch ideas:

- Try again with 1X probe attenuation, maybe record output to USB 

- Remove unconnected MACBs from master

- 

10.30 : Turn off AIDA FEE64s 

        Prepare a ground cable for snout - M10 terminal on one end for copper bar. Will affix with Cu tape for now (no free screws)

Plan for today:

Remove extraneous ground cables
Check ground of all FEE64s esp. 05 and 07 - include on FEE64 side.
 14:42 - Done all grounds seem snug, extra ground cables removed. Try power on and check

Try powering just DSSD1 FEE64s
 - No change (aida01 125k, aida02,03,04 - 400k)

Try grounding snout
 14:59 Connection to snout very bad as tape does not fix well to thick copper in braid. nO difference either way.

Probe PSU output with Battery DSO if available
 - See figure 2

Try shuffling FEE64 power allocation
 - 15:32 - Now as 1 X 3 X 2 X 4 X
                  5 X 7 X 6 X 8 X
(Also FEEs on own pair)
   No difference to rates

Multimeter voltages for last socket of PSU1 (paired with aida04):
  1 : 6.02 V
  2:  6.02 V
  3:  6.02 V
  4: -6.44 V
  5:  7.74 V

Similar on PSU2

Voltage between right (GND) pin 5 and 1 (pin 5 is COM) is -0.4 V, similar if pin 4 is COM. Pin1-3 are 0 V when paired
  

Spectra layouts for 2x DSSSDs can be found in directory ~/LayOut/2xDSSSDs

Attachment 1 - DSSSD bias & leakage current - OK

Attachment 2 - ADC data item stats

Attachment 3 - FEE64 temps - OK

Attachments 4-7 - aida01, 02, 03 & 04 2.*.W spectra

Noise observed for asics #1 & #2 of aida02 consistent with no cable attached - confirmed by visual inspection - ribbon cable disconnected from Samtec header of adaptor PCB

To Do list

1) re-connect ribbon cable to aida02 adaptor PCB
2) good quality ground to snout - use screws at inter-stage
3) install heavy duty grounds
4) ... 


Attachment 8 - adc data item stats - slow comparator 0x64

Attachment 9 - per FEE64 rate spectra - slow comparator 0x64

Attachment 10 - per FEE64 rate spectra - slow comparator 0xa

-

13:30 - Attach heavy duty ground to AIDA 

Attachment 11 - per FEE64 rate spectra - slow comparator 0xa

Try power cycle as system ground changed significantly now

Try to reattach aida04 TTY connector - still wrong

Archive old tty logs (ttyUSB*) to zip and delete them, makes easier to track startup 

Attachment 12 - per FEE64 rate spectra - slow comparator 0xa

No major difference, aida01 quieter than before

aida05 has some missing channels - loose ERNI?

Attachements 13 & 14 - Waveforms

Temporarily raise to 0x64 and test merger for DTAS synchro test later... all works good to MBS 
Change NETVAR MERGE.LinksAvailable to 8

Notice one copper screw touching aluminium, add some kapton tape behind it to isolate it. No difference

Voltage diff between aida02,aida06 < 1 mV
Voltage diff between copper bars < 0.5 mV (but not 0)

A comment from DTAS people that they observed a large increase in noise recently - perhaps from accelerator
May indicate current power/gronud oddities?

Attachment 15 - Rates at 0x1f (= 310 keV)

DSSSD#1 reasonable (aida04 a bit bad), but mostly just pulser (25 Hz)

DSSSD#2 much worse esp. p+n sides (aida05, aida07)

ERNI connectors pushed in and feel fully in

2x MSL type BB18(DS)-1000 installed


Adaptor PCB LK config

all FEE64s LK2, LK4 fitted
n+n FEE64s LK1 fitted
bottom p+n FEE64s LK3 fitted


AIDA PSU config

top 1-3 2-4
bottom 5-7 6-8


DSSSD bias -> p+n FEE64 core, n+n FEE64 braid


Heavy duty grounds not connected to FEE64 adaptor PCBs


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

BNC PB-5 settings
 amplitude 1.000V
 attenuation x1
 tau_d 1ms
 frequency 25Hz
 polarity +


Attachment 1 - DSSSD bias & Leakage current - OK

Attachment 2 - FEE64 temps OK

Attachment 3 - adc data item stats

Attachments 4-9 - system wide checks OK *except* aida07 fails ADC calibration

Attachments 10 & 11 - 1.8.W spectra 20us FSR

Attachments 12 & 13 - 1.8.L spectra - aida03 pulser peak width 155 ch FWHM

Attachment 14 - per FEE64 rate spectra



19.15 Attachments 15-18 - 2*W spectra for aida01, 02, 03 &04

Attachment 19 - per FEE64 rate spectra

Attachment 20 - adc data item stats

DSSD stack will be as follows

1      3208-7  1019       125              upstream
2      3208-13 1020       120              downstream

First start checking bias pins on both detectors
These are pins on the *bottom right* of each 68 pin connector (C-2299)
Expect finite resistance

3208-7: 
  Top and bottom: 22 Ohm
  Left and right: 22 Ohm

3208-13:
  Top and bottom: 22 Ohm
  Left and right: 22 Ohm

Conclusion: All bias bond wires are intact on both DSSDs

Visual inspection is both DSSDs look good with no damage or bond wire issues

Installed in snout: full stack

3 mm bPlas 1
17 mm Air
1 mm AIDA 1  (645 mm from base of snout)
9 mm Air
1 mm AIDA 2 (655 mm from base of snout)
12 mm Air
3 mm bPlas 2

The n+n FEEs were all removed to adjust the platform back to the single configuration

After some confusion we found the orientation of the frame to position the single detectors and moved back

Faulty AIDA cards aida05 and aida14 were removed to be returned backi (ASIC damage)

The cables for aida10 and aida12 were moved back to the left-right side and the n+n cards were installed and reocnnected

p+n cards moved to bring aida11 and aida09 above aida03/aida07 and aida01/aida05. Also move a different card to replace old aida05

While doing this it was noticed the HDMI for aida13 was very loose and actually fell off (I guess the cable was pulled incorrectly)
It has been removed and will eb sent back to be resoldered 

The copper grounding bars and ITEM frame were removed due to conflicting with the single snout layout
The bolts are slightly too short to hold the frame where it won't conflict so we loko for longer bolts to reattach the system
Some new ground cables will be made to reach the extra n+n FEEs

Aida13-Aida16 removed from the PSU 

fig1: layout of snout frame in "single" mode (alu block configuration)


MAC Addresses

aida01 - ba-8a
aida05 - 0d:15
aida09 - ee-01

aida04 - f6-b7
aida08 - ba-2b
aida12 - ba:89 

aida03 - d8-21
aida07 - 41:b4:0c
aida11 - f6-5a

aida02 - ba:22
aida06 - ee:72
aida10 - cf-ac [mistakenly swapped with aida12]

Second switch will stay in S4 and has now been screwed in properly below the switch 1 and the hdmi cables entrance

DHCP *not* updated

Relay is powered *off* so FEEs cannot be turned on, alL HV channels disabled

Tomorrow is a holiday so no work will be happening @ GSI

09:00 - Remove bias of DSSDs  and pwoer of FEEs

Remove snout from S4 so DEGAS frame can be mechnically removed

Snout now in FRS Messhuette 

17.40 DAQ stopped

Attachment 1 - DSSSD bias & leakage current

Attachment 2 - grafana DSSSD bias, leakage current - OK, temp data has ceased

Attachment 3 - FEE64 temps - OK

15.11 DAQ stopped

Attachment 1 - DSSSD bias & leakage current

Attachment 2 - grafana DSSSD bias, leakage current - OK, temp data has ceased

Attachment 3 - FEE64 temps - OK

16.31 DAQ stopped

Attachment 1 - DSSSD bias & leakage current

Attachment 2 - grafana DSSSD bias, leakage current - OK, temp data has ceased

Attachment 3 - FEE64 temps - OK

17.20 DAQ stopped

Attachment 1 - DSSSD bias & leakage current

Attachment 2 - grafana DSSSD bias, leakage current & temp - OK

Attachment 3 - FEE64 temps - OK

18.01 DAQ stopped

Attachment 1 - grafana DSSSD bias, leakage current & temp - OK

Attachment 2 - DSSSD bias & leakage current

Attachment 3 - FEE64 temps - OK

Attachment 4 - ADC data item stats

      file no storage mode, no MBS data transfer

      ADC control register 0x0 

      std disc outputs disabled

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

      BNC PB-5 settings
      amplitude 1.000V
      attenuation x1
      tau_d 1ms
      frequency 2Hz
      polarity +

Attachment 1 - DSSSD bias & leakage current

Attachment 2 - grafana DSSSD bias, leakage current & temp - OK

Attachment 3 - ADC data item stats

Attachment 4 - FEE64 temps - OK

16.35 zero all histograms
      zero statistics
      zero NewMerger statistics

      ASIC check control - all FEE64s, all ASICs

      baseline counters
      system wide checks - all OK *except* aida07 WR error 0x10

Attachment 5 - per FEE64 rate spectra

Attachmnents 6 & 7 - per FEE64 1.8.W spectra 20us FSR

17.35 zero all histograms
      zero statistics
      zero NewMerger statistics

      ASIC check control - all FEE64s, all ASICs

      file no storage mode, no MBS data transfer

      ADC control register 0xff

      all disc outputs disabled

      ASIC settings 2021Apr29-13-16-00
       slow comparator 0x80

      BNC PB-5 settings
      amplitude 1.000V
      attenuation x1
      tau_d 1ms
      frequency 2Hz
      polarity +

Attachment 1 - grafana DSSSD bias, leakage current & temp - OK

Attachments 2-10 - NewMerger stats

Attachments 11-13 - iptraf, TapeServer, NewMerger

Attachment 14 - per Fee64 rate spectra

Attachment 15 - lost activity  monitor

Attachment 16 - ASIC settings aida01

Attachments 17-22 - adc, pause, resume & correlation scaler data items, push, flush, aida01 & aida06 stats

Attachment 23 - FEE64 temperatures OK

Attachment 24 - DSSSD bias & leakage current

08:00 Still have beam for the time being.
      Currently on file R4_2049

      FEE Stats - attachment 1
      FEE Temps ok - attachment 2
      Bias and leakage currents - attachment 3
      System wide checks all ok *except aida09 fails clock check with value 6 which is ok*

      Plan for the morning is once beam is lost is Ge group will enter and place source on the snout to perform efficiency measurement.
      Once they have left the area and are taking data a pulser walkthrough will be performed.
      Patrick can then have access to the system

08:16 Beam taken away
      Data taken stopped on file R4_2055
      Will perform a pulser walkthrough now

      Pulser walkthrough started on R5
      1V->0.1V in 0.1V steps
      Pulser setting - attachment 4
      p+n pulser peaks - attachment 5
      n+n pulser "peaks" - attachment 6

01:00:     Attachments 1-3, System checks good

03:00:     Attachments 4-6, System checks good

05:00:     Attachments 7-9, System checks good

07:00:     Attachments 10-12, System checks good