 Thu Oct 21 16:18:51 2021, OH, FEE and Adaptor board groundings
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During investigations into the noise today by NH and OH a couple of findings were made on the grounding of the FEEs and Adaptor boards.
- The adaptor boards have no connection to the FEE ground over the ERNI connector
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Fri Oct 29 10:49:01 2021, OH, Noise tests - 28th October -29th October 24x
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Plan for the day was to connect a mechanical ground to the FEEs connected to DSSD0 1, 2, 3, 4, 9, 10, 11 and 12
This was done by connecting thick copper cable to the mechanical ground wires on the AIDA frame (These ground wires are connected to the platform ground |
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Wed Mar 2 09:08:44 2022, OH, DAQ Status 2nd March 2022
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DAQ was found yesterday with none of the FEEs reporting any good events on any FEE - attachment 1
Temperature menu is still responsive and all FEEs report a temperature
Looking at the white rabbit timestamps aida09 has a gibberish timestamp - attachment 2
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 Wed Mar 2 10:05:13 2022, OH, DAQ Status 2nd March 2022
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> DAQ was found yesterday with none of the FEEs reporting any good events on any FEE - attachment 1
> Temperature menu is still responsive and all FEEs report a temperature
> Looking at the white rabbit timestamps aida09 has a gibberish timestamp - attachment 2
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Mon May 2 09:52:20 2022, OH, Shifter checklist 2022
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Every 30 minutes:
- Reload statistics (Web browser tab screen 1, workspace 3)
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Sun May 15 07:40:52 2022, OH, Sunday 15th May 08:00-16:00 10x
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08:40 FEE Temperatures ok - attachment 1
FEE statistics - Attachment 2
Bias and leakage currents ok - attachment 3
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Tue May 17 06:58:51 2022, OH, Tuesday 17th May 6x
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08:00 Still have beam for the time being.
Currently on file R4_2049
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Sun Jun 19 12:36:10 2022, OH, Sunday 19th June
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Yesterday the sum/inverter was found to be a considerable source of noise in the system.
Plugging it into an oscilloscope this morning it was clear there was a Vpp 17mv 60kHz sin wave in its signal - attachment 1 yellow trace
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Thu Jun 23 06:56:02 2022, OH, Thursday 23 June 08:00-16:00 11x
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07:56 Taken over from AM
Current White Rabbit Error status:
Base Current Difference
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Fri Jun 24 06:56:06 2022, OH, Friday 24 June 008:00-16:00 16x
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07:56 Took over from AM. No issues reported overnight
Stats ok - attachment 1
Temperature ok - attachment 2
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Mon Jun 27 06:45:22 2022, OH, Monday 27th June 08:00-16:00
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07:45 Spoke to David and the beam has been gone since about 05:30
Reason for the loss of beam is a vacuum issue before the FRS
They are waiting for the experts
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Fri Jun 14 15:00:47 2024, Norah , Muneerah, 16:00-20:00 Friday 14 June 13x
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Everything appears to be running smoothly. Attachments 1-4 were taken around 16:00
DSSSD Bias & Leakage Current - Check: OK (see attachment 1)
FEE64 Temperature - Check: OK (see attachment 2) |
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Fri Apr 26 07:01:26 2024, Norah, 08:00 - 16:00 Friday 26 April
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10:00 Checks:
All seems smooth.
DSSD bias and leakage current ( Attachment 1) |
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Sat Apr 27 15:13:06 2024, Norah, 16:00 - 00:00 Saturday 27 April 15x
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14:50 Checks
Leakage current is 20.021 and HV status is Max Voltages ! Is it normal ? - attachments 1
It is quite warm at GSI today and this may be a temperature effect. Hopefully will go down latter in the day (Marc). Any way let's kep an |
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Fri Nov 1 14:17:15 2019, Nic, Patrick, Reply: WR Timestamps
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> > All 12 FEEs have valid WR Timestamps
> > Had to powercycle aida09 once as before raw readout was displaying upper 12 bits of WR timestamp as 0. Unsure of other method.
> >
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Thu Nov 7 10:22:26 2019, Nic, Patrick, Reply: WR Timestamps
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> > > All 12 FEEs have valid WR Timestamps
> > > Had to powercycle aida09 once as before raw readout was displaying upper 12 bits of WR timestamp as 0. Unsure of other method.
> > >
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Tue Mar 26 14:58:09 2019, NH, VP, How to reset merger
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If the merger doesn't show "xfer Links => Merger" at the top, it is probably the merger setting has been corrupted somehow. This is
how to reset it
If you go to the web page from which you started the Merge and TapeServer |
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Tue Mar 12 16:16:49 2024, NH, TD, JB, HA, Summary of DSSSD Biasing 12.03
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DSSD#1 undergoes a breakdown at 90V, two of the three wafers show this
- The adapter PCBs themselves have no breakdown at 100V, indicating the issue is internal to the snout
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Fri Dec 20 12:04:03 2019, NH, TD, Friday 20 December 2019 7x
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Fig 1: DSSD Leakage currents ok
Fig 2: FEE Temps ok
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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 |