 Fri Apr 9 16:45:29 2021, NH, HA. GA, GZ, OH, TD, AIDA Noise 6x
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AIDA snout was reconnected and we saw originally a very good reduction in noise from S452 (fig 1)
Occasional bursts of increased rates were noticed, perhaps related to works in S4.
Tape rate at optimal conditions was around 6 MB/s
We still saw some extrinsic noise in waves, two frequencies observed : 1.5 MHz and 100 kHz or so
Figs 2, 3 are at 50 MS/s
Figs 4, 5 are at 5 MS/s
Today the situation has become a lot worse for reasons still unknown.
aida01 shows very strong noise, frequency 125 kHz or so it seems (still at 5 MS/s)
Amplitude 100 mV or so I think
Investigation still underway |
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Tue Aug 17 12:39:25 2021, NH, TD, AIDA Noise 16x
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Investigate noise situation of AIDA (no DSSSDs connected)
Figs 1-6: Waves, Pulser Peaks + Widths *before* any changes
- aida16 very noisy ASICS 1&2, normal ASICS 3&4
- back-side aidas (02,04,06,08) worse resolution than front-side
- high-frequency noise still noticeable in waveforms
Figs 7-8: Remove pulser in (from NIM rack) only
- no noticable change
Figs 9-10: Remove all pulser cables from adapter boards
- looks improved
Figs 11-12: HV Braid->GND Jumpers removed
Fig 13-14: All HV cables removed
- aida06, aida14 isn't updating
- very noticable improvement
Fig 15-16: Intermediate HV cables re-added
- signal worse in FEE64s with HV cables
- aida09, aida01, aida10, aida13, aida05, aida14 don't have HV interconnect cables, look good
Conclusion: We see noticeable improvements removing the interconnect cables between FEE64s.
Pulser widths now:
- aida14 (-ve amplitude) = 13.5 channels
- aida08 (+ve amplitude) = 40 channels (?) |
 Thu Aug 19 10:37:50 2021, TD, AIDA Noise
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11:30 BNC PB-5 pulser polarity chnaged from positive to negative (using LOCAL control)
Swap BNC cables (top + bottom & left + right) from BNC PB-5 and Cooknell SA1 Sum Amp outputs
Switch Cooknell SA1 Sum Amp output from negative to positive
Observe pulser peak of c. 15 ch FWHM for aida08 and c. 35 ch FWHM for aida14
This probably indicates
- noisy Cooknell SA1
- problem with T and/or Lemo-00 cable between BNC PB-5 and Cooknell SA1
> Investigate noise situation of AIDA (no DSSSDs connected)
>
> Figs 1-6: Waves, Pulser Peaks + Widths *before* any changes
> - aida16 very noisy ASICS 1&2, normal ASICS 3&4
> - back-side aidas (02,04,06,08) worse resolution than front-side
> - high-frequency noise still noticeable in waveforms
>
> Figs 7-8: Remove pulser in (from NIM rack) only
> - no noticable change
>
> Figs 9-10: Remove all pulser cables from adapter boards
> - looks improved
>
> Figs 11-12: HV Braid->GND Jumpers removed
>
> Fig 13-14: All HV cables removed
> - aida06, aida14 isn't updating
> - very noticable improvement
>
> Fig 15-16: Intermediate HV cables re-added
> - signal worse in FEE64s with HV cables
> - aida09, aida01, aida10, aida13, aida05, aida14 don't have HV interconnect cables, look good
>
> Conclusion: We see noticeable improvements removing the interconnect cables between FEE64s.
>
> Pulser widths now:
> - aida14 (-ve amplitude) = 13.5 channels
> - aida08 (+ve amplitude) = 40 channels (?) |
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Fri Aug 20 14:33:24 2021, TD, AIDA Noise 6x
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>
> 11:30 BNC PB-5 pulser polarity chnaged from positive to negative (using LOCAL control)
> Swap BNC cables (top + bottom & left + right) from BNC PB-5 and Cooknell SA1 Sum Amp outputs
> Switch Cooknell SA1 Sum Amp output from negative to positive
>
> Observe pulser peak of c. 15 ch FWHM for aida08 and c. 35 ch FWHM for aida14
>
> This probably indicates
> - noisy Cooknell SA1
> - problem with T and/or Lemo-00 cable between BNC PB-5 and Cooknell SA1
>
> > Investigate noise situation of AIDA (no DSSSDs connected)
> >
> > Figs 1-6: Waves, Pulser Peaks + Widths *before* any changes
> > - aida16 very noisy ASICS 1&2, normal ASICS 3&4
> > - back-side aidas (02,04,06,08) worse resolution than front-side
> > - high-frequency noise still noticeable in waveforms
> >
> > Figs 7-8: Remove pulser in (from NIM rack) only
> > - no noticable change
> >
> > Figs 9-10: Remove all pulser cables from adapter boards
> > - looks improved
> >
> > Figs 11-12: HV Braid->GND Jumpers removed
> >
> > Fig 13-14: All HV cables removed
> > - aida06, aida14 isn't updating
> > - very noticable improvement
> >
> > Fig 15-16: Intermediate HV cables re-added
> > - signal worse in FEE64s with HV cables
> > - aida09, aida01, aida10, aida13, aida05, aida14 don't have HV interconnect cables, look good
> >
> > Conclusion: We see noticeable improvements removing the interconnect cables between FEE64s.
> >
> > Pulser widths now:
> > - aida14 (-ve amplitude) = 13.5 channels
> > - aida08 (+ve amplitude) = 40 channels (?)
Removed the T-piece between pulser and summing amplifier
pulser FWHM still ~30 channels - not the T-piece, probably summing amp
Checked the noise of HV and LV on battery DSO
- LV - no noticeable noise on any channel (< 5 mV rms)
- HV - noticable periodic signal (~100 kHz, 100 mV Vpp) on both core and braid channels, common to both
independent of bias voltage
See figs 1-6 : 0V, 10V, 20V, 50V, 100V, 0V (high photo resolution) of bias voltage
AC coupled 1MOhm Ch1 = HV Core, Ch2= HV Braid, Math=Ch1-Ch2
Filtering on AIDA front end ~ 10 nF (gnd), 3 kOhm (series) - low pass ~ 33kHz rolloff
100 kHz would be attenuated factor of 5 maybe - 20 mV signal - still quite high for ASICs
Try introducing additional inline filtering of maybe 3 kHz (1 nF gnd, 3 kOhm series)
Check on one DSSSD, if see improvement can migrate to adapter boards in new revision
Things to do:
TD:
Inline filters
NH:
Check same behaviour other N1419ET HV supplies
Check line voltages from CAEN NIM bin |
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Sun Aug 22 18:40:08 2021, TD, AIDA Noise
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> >
> > 11:30 BNC PB-5 pulser polarity chnaged from positive to negative (using LOCAL control)
> > Swap BNC cables (top + bottom & left + right) from BNC PB-5 and Cooknell SA1 Sum Amp outputs
> > Switch Cooknell SA1 Sum Amp output from negative to positive
> >
> > Observe pulser peak of c. 15 ch FWHM for aida08 and c. 35 ch FWHM for aida14
> >
> > This probably indicates
> > - noisy Cooknell SA1
> > - problem with T and/or Lemo-00 cable between BNC PB-5 and Cooknell SA1
> >
> > > Investigate noise situation of AIDA (no DSSSDs connected)
> > >
> > > Figs 1-6: Waves, Pulser Peaks + Widths *before* any changes
> > > - aida16 very noisy ASICS 1&2, normal ASICS 3&4
> > > - back-side aidas (02,04,06,08) worse resolution than front-side
> > > - high-frequency noise still noticeable in waveforms
> > >
> > > Figs 7-8: Remove pulser in (from NIM rack) only
> > > - no noticable change
> > >
> > > Figs 9-10: Remove all pulser cables from adapter boards
> > > - looks improved
> > >
> > > Figs 11-12: HV Braid->GND Jumpers removed
> > >
> > > Fig 13-14: All HV cables removed
> > > - aida06, aida14 isn't updating
> > > - very noticable improvement
> > >
> > > Fig 15-16: Intermediate HV cables re-added
> > > - signal worse in FEE64s with HV cables
> > > - aida09, aida01, aida10, aida13, aida05, aida14 don't have HV interconnect cables, look good
> > >
> > > Conclusion: We see noticeable improvements removing the interconnect cables between FEE64s.
> > >
> > > Pulser widths now:
> > > - aida14 (-ve amplitude) = 13.5 channels
> > > - aida08 (+ve amplitude) = 40 channels (?)
>
> Removed the T-piece between pulser and summing amplifier
> pulser FWHM still ~30 channels - not the T-piece, probably summing amp
>
> Checked the noise of HV and LV on battery DSO
> - LV - no noticeable noise on any channel (< 5 mV rms)
> - HV - noticable periodic signal (~100 kHz, 100 mV Vpp) on both core and braid channels, common to both
> independent of bias voltage
> See figs 1-6 : 0V, 10V, 20V, 50V, 100V, 0V (high photo resolution) of bias voltage
> AC coupled 1MOhm Ch1 = HV Core, Ch2= HV Braid, Math=Ch1-Ch2
>
> Filtering on AIDA front end ~ 10 nF (gnd), 3 kOhm (series) - low pass ~ 33kHz rolloff
> 100 kHz would be attenuated factor of 5 maybe - 20 mV signal - still quite high for ASICs
> Try introducing additional inline filtering of maybe 3 kHz (1 nF gnd, 3 kOhm series)
1nF/3k => 333kHz low pass rolloff
10nF/1M => 100Hz low pass rolloff
> Check on one DSSSD, if see improvement can migrate to adapter boards in new revision
>
> Things to do:
> TD:
> Inline filters
> NH:
> Check same behaviour other N1419ET HV supplies
> Check line voltages from CAEN NIM bin |
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Mon Sep 16 12:24:46 2019, NH, AIDA Monitoring
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https://docs.google.com/spreadsheets/d/1fZBybHodSvacUdKpDM_VKznqTrh49CKnqKVQVMEDWGs/edit?usp=sharing
A spreadsheet of ambient conditions and water temperature in S4 for AIDA.
Will show the distance to danger points (interlock shutdown and condensation on the pipes) |
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Tue Jun 4 09:19:10 2019, NH, AIDA Interlock
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Currently AIDA's interlock is off (no lights) and hence AIDA cannot be powered on. Under investigation - power supply has been replugged but seems ok.
Update: It seems the interlock is correctly stopping AIDA from being powered on due to high humidity on the cooling lines. Am currently trying to verify the temperature with GSI technical staff |
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Tue Mar 10 10:16:56 2020, OH, AIDA Implant Range Scan
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A range scan was performed using AIDA.
See the GSI elog: https://elog.gsi.de/despec/S480/19 |
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Thu Mar 7 15:15:29 2024, JB, NH, CC, AIDA HV Bias Test IV Curve
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AIDA I-V Test
| Voltage (V) |
Current (uA) |
| 10 |
1.43 |
| 20 |
2.065 |
| 30 |
2.415 |
| 40 |
2.64 |
| 50 |
2.825 |
| 60 |
2.99 |
| 70 |
3.185 |
| 80 |
3.58 |
| 90 |
5.01 |
| 100 |
9.4 |
- 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. |
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Mon Mar 7 12:20:26 2022, NH, TD, AIDA Grounding Checks Mon 7 Mar 14x
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Remove all DSSD ribbon cable braid ground from FEE64s to check n+n ground loops
Removing all on n+n side only and test resistance to ground: 4, 6 and 8 show continuity to ground, 2 shows no connection (braid ring terminal to copper bar)
Remove all p+n braids as wll and check:
- See no continuity to ground (good)
- Snout has no continuity to ground (good)
- n+n side fees 4 and 8 to seem to have continuity to snout though (bad)
- p+n checked and don't seem to have continuity to gnd (except when braid was touching a LEMO barrel)
- n+n aida06 maybe has high resistance connection to ground (bad) or (about 0.7 V drop according to RS multimeter)
Bias+Power up and check noise
aida09 Peak width = 86.03+/- 1.721
aida02 Peak width = 509.48+/- 11.1812
Low frequency noise on wavesforms corresponds to ca 100 kHz - switching power supply?
Attachment 6 - ADC data item stats
all p+n/n+n cable braids disconnected
all FEE64 adaptor PCBS grounded to Copper busbar OK
Remove guard ring jumper on upper-middle p+n FEE (rear guard ring of middle DSSSD)
Attachment 7 - ADC data item states
No real change to rates
Remove field plate jumpers on all p+n FEEs
Attachment 8 - ADC data item states
No real change to rates
Remove bias LK1 jumpers on n+n FEES:
Generally worse across the p+n side, no real change to n+n side
Attachment 9 - Stats with LK1 removed:
aida09 Peak Width = 181.77. p+n see Attachment 10
aida02 Peak width = 505.23. n+n see Attachment 11
Attachment 12 - p+n waveforms
Attachment 13 - n+n waveforms
High frequency component reduced but 100 kHz low frequency component stronger
Remove LK3 from aida03,aida07 (no jumpers at all on any FEE) - DSSSDs floating
No significant change, see attachment 14 stats |
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Wed Apr 10 12:33:58 2019, NH VP, AIDA Firmware Update
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All AIDA modules have been updated to a new firmware 0xd330701 which should fix the merger issues.
A new GSI WR timestamp page has been added to MIDAS - the SYNC rollover is suggested to be 0xe for now.
(VP is working on lowering the rate of WR SYNC infowords)
Tested yesterday and Merger no longer reported major timestamp issues
n.b. aida11 and aida12 didn't update properly until today, this may have caused a few.
MBS relay is currently not functioning (data is confusing) but this is under investigation by VP ASAP.
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Sat Apr 24 13:25:23 2021, NH, TD, AIDA FEE64 crash log for S460
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https://docs.google.com/spreadsheets/d/1CyL5L-WLsh9fsS7CN989GC3ktqiPQOkG8YIDJrrGxYA/edit#gid=0 |
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Wed Oct 29 13:39:13 2025, TD, AIDA FEE64 adaptor PCB to AIDA DSSSD cabling
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The cables form the AIDA FEE64 adaptor PCB to the MSL type BB18 DSSSDs are constructed as follows
Per FEE64
2x Samtec FFSD-17-D-xx-01-N-SR where xx is the cable length in inches
along length if ribbon cable Al-plated copper braid drain wire with crimped eyelets to be connected to AIDA FEE64 adaptor PCB
ribbon cables completely wrapped by inner layer of 3M 1245 copper tape (https://docs.rs-online.com/55e0/0900766b814784d5.pdf) and outer layer of 3M 5413 polyimide tape
(https://docs.rs-online.com/2bce/A700000007254120.pdf)
1x Kapton PCB 15cm length, no screen
transitions from FFSD cables to DSSSD Samtec connectors, minimal additional material in volume around DSSSDs |
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Sun May 8 17:43:57 2022, NH, AIDA FEE64 Layout
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AIDA FEE64 layout with respect to the beam. |
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Sun Mar 10 17:08:12 2024, NH, AIDA FEE Layout + Cabling Plan for S100
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Proposed FEE numbering and wiring plan for upcoming experiment S100 (2x Wide DSSSDs)
Image designed in draw.io, source attached
FEE numbering is as S450, minimises cable movement from S505/Narrow AIDA
But means merger is not working with 1 DSSD (until all FEEs installed)
Wiring of adapter boards as from noise tests and what should work for DSSD bias
LK3 on middle bottom adapter to ground DSSD
LK1 on one n+n adapter to ground n+n side bias
p+n has -ve voltage (w.r.t. ground) bias applied via lower adapter boards
ground loop grounds all adapter boards, except 2 p+n adapter boards which are grounded by the bias lemo shield instead
MACB layout also included, with expected NIM logic signals for the aida scalers:
1: Pulser/Sync clock (send to all subsystems, "trigger 3")0
3/4: Time Machine
5/6: SC41L/R
All other FEEs have their scaler available
(Scaler should be in left LEMO on MACB, right is output (AIDA->NIM/unused), bottom 4 are triggers from AIDA (unused)
Test circuit will not be used in experiment due to noise, but can be temporarily set up for pulser walkthrough
Revision 2 correct as of 27 March 2023 |
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Wed Jun 29 10:48:26 2022, NH, OH, AIDA Dismounted
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All detectors removed from single and triple AIDA snouts
Empty snouts *and* DSSDs (in boxes) stored in NH office |
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Wed May 19 20:02:27 2021, NH, AIDA Dead Time Analysis 6x
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Some plots of AIDA dead time (From PAUSE/RESUME data items) against time.
The histograms are binned in intervals of 100 ms, with the blue bars corresponding to dead time in the FEE - the y-value is the percent of the 100ms interval the card was dead.
Beam spills are indicated by the red bars (1 = on spill)
Dead time is mostly dominant in the n+n FEES: fee2, fee4, fee6, fee8 and a 30 second snapshot is shown
Can see deadtime largely seems to occur at the end of a spill - this suggests buffers/queues filling up from the high on-spill rates .
The much quieter p+n strips show a similar pattern but much less frequently.
Deadtime does not always sync up between FEE64s it seems.
IN all case the pause/resume interval seems to only last for less than 100 ms. |
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Tue Jun 22 13:01:19 2021, NH, AIDA Data on lustre
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The following runs are now copied to lustre
If necessary they can be removed from AIDA HDDs for space.
There are also spare HDDs that can (and should) be swapped for the current ones
/lustre/gamma/DESPEC_S452_FILES/AIDA
S452
R1
R2
R3
R4
R5
R6
R7
R9
R11
R13
R14
R15
R16
R17
R20
R21
R22
R23
R25
R27
R28
R29
R30
R33
R34
R35
R36
R38
R39
R40
R42
R43
R46
R50
R56
R57
R58
/lustre/gamma/DESPEC_S460_FILES/AIDA
S460
R1
R2
R4
R5
R7
R9
R11
R13
R14
R16
R20
R21
R23
R24
R25
R26
R27
R30
R31
R32
R33
R34
R35
R36
R38
R40
R45
R46
R48
R50
R51
R52
/lustre/gamma/DESPEC_S496_FILES/AIDA
S496
R1
R2
R3
R4
R5
R6
R7
R9
R11
R13
R14
R15
R16
R17
R20
R21
R22
R23
R25
R27
R28
R29
R30
R33
R34
R35
R36
R38
R39
R40
R42
R43
R46
R50
R56
R57
R58 |
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Fri Apr 16 00:47:36 2021, OH-ML, AIDA DAQ Reset
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1:18 (CET) No rate in AIDA 07.
Oscar did a AIDA DAQ reset and a quick wide check.
(Power cycle
All back to normal. |
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Sat Apr 24 03:13:05 2021, ML, AIDA DAQ Reset
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AIDA PC crashe completely at ~3:30am CET.
Tom was called and he Restarted the AIDA system at ~4am with Run 52.
Not sure what cause the crash but AnyDesk remote connection was suddenly lost and once reconnected all Terminal sessions were gone.
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