 Mon Nov 28 18:07:14 2016, CG, TD, AE, DK, Tuesday 29 November 42x
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01:39 : Attachment 26 (R30_70to72) shows a gradual change in the hit pattern for DSSD2 (at the lower left
corner) which may indicate the noise level was increasing.
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 Mon May 30 08:18:48 2016, CG, TD - PJCS reply, MACB settings
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Quote:
14.00 MACB settings (from left -> right) |
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Mon May 30 08:43:10 2016, CG, TD - PJCS reply, MACB settings
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Quote:
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Tue Feb 24 03:04:59 2015, CG, TD, Tues 24th Feb progress 9x
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24/02/15
1200: Update the FEE firmware on nnaida1-16 without problem.
Gone from file FEE_Oct12_27Nov13.bin ----> FEE_Riken_Apr14_24.bin |
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Mon Apr 20 06:53:24 2015, CG, TD, Progress 20th April + RPi procedure 7x
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20/04/15
1200: Complete all points on first part of check list, except checking the PSU voltages.
System now in powered and has all network/HDMI cables attached. |
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Mon Apr 20 07:39:49 2015, CG, TD, Rasberry Pi : USB ac mains switch + USB serial link to FEE64 console
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It would appear that you cannot reliably startup the Raspberry Pi (nnrpi1)
connected to both the USB ac mains switch *and* the USB-serial link to FEE64
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Tue Apr 21 06:01:50 2015, CG, TD, Tuesday 21 April 2015 8x
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21/04/15
1325: Recabled the MACB distribution tree as per PC-S instruction yesterday.
Now have nnaida5+6, 13+14 in MACB3 (nnaida5 in output 1) and nnaida3+4, 11+12 in MACB10 |
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Thu Nov 5 16:28:05 2015, CG, TD, 5 Nov 2015 - New kapton cable tests @ DL 11x
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New Kapton PCB design (2x 0.45m + inter-connecting PCB, no ground plane layers) under test with small system in T9.
3 cables modified to remove ground connection.
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Wed Nov 11 17:36:19 2015, CG, TD, 11 Nov 2015 - new Kapton cable tests at DL 18x
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Upon starting system with nothing connected beyond adapter PCBs, observed pulser peak FWHM of ~12-15ch in nnaida13+14 and ~15-18ch in nnaida11+12
All newly shielded new kapton cables passed continuity tests between drain wire and Cu tape.
Throughout all tests, grounded cable has been connected to nnaida13. All other nnaida have ground isolated cables. |
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Thu Nov 12 18:28:41 2015, CG, TD, 12 Nov 2015 - new Kapton cable tests at DL 23x
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This morning PC-S changed firmware and DAQ software to that of the RIKEN setup
Firmware version /MIDAS/AIDA/FEE_Riken_Apr14_26.bin
DAQ software has been changed from AidaExecV8 to AidaExecV7 |
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Fri Nov 13 16:17:14 2015, CG, TD, 13 Nov 2015 - new Kapton cable tests at DL 6x
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Powered system up with 4 bare 45cm kaptons connected and nothing seems to have changed from where we left last night
Waveforms in nnaida11 look good and peak widths in nnaida11 1.8.L and 1.10.L are ~70ch.
Turned off flash ADCs for all FEEs by setting Q8_transfer.vhd: 0xa00, offset 0x00, to 0 to assess any affect they may play in the observed noise |
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Wed Nov 18 18:18:26 2015, CG, TD, New Kapton cable tests at DL
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Note: kapton #7 may have broken pins next to (deliberately) broken ground pin. Unclear, but should not be used for bias until certain.
Detector BB18 2998-22 connected via 4 45cm kaptons and biased to +200V via nnaida12+14, with leakage current 4.310uA @ room temp 25.4oC.
Turned off FADCs as per PCS instructions in previous entry - no change. Turned back on. |
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Thu Nov 19 12:19:15 2015, CG, TD, Report: Low - nnaida12 ASIC4 not functioning
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Current nnaida12 (MAC address 2b:09:e8) has several noisy channels in ASICs 1-3, whilst ASIC4 does not work at all.
Frequently, but not always, ASIC4 fails to load/check.
Additionally, fast discriminators are turned off in settings but show activity in the Hit spectrum. |
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Thu Nov 19 12:23:03 2015, CG, TD, Report: Low - Error message when selecting Act on all FEE64s for FADC calibrate
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When trying to calibrate FADCs in FADC Align and Control page, ticked 'Act on ALL FEE64 modules'.
Error message displayed (attachment 1) and, despite 'Act on ALL' box being ticked, was only able to act on one FEE64 at a time. |
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Thu Nov 19 17:31:24 2015, CG, TD, New Kapton cable tests at DL
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Powered system on from the state it was in last night. Biased to +200V with leakage current 3.9uA at room temp 22.8oC.
Performance of nnaida14 at shaping time of 8us slightly worse than last night - peak now non-Gaussian and double peaked. New source of noise?
Trying different permutations of grounding options initially led to no improvements. |
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Thu Nov 26 16:32:52 2015, CG, TD, New Kapton cable tests at DL 9x
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Powered on system without issue. biased detector to -200V. Leakage current not stable, bouncing around between ~3.66 - 3.74uA. Room temp 22.0oC
-> Peak widths similar to yesterday.
Changed through various permutations of jumper connections (field planes, detector grounds, bias ground reference). |
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Thu Dec 3 10:12:08 2015, CG, TD, Report: Low - RPi power cable can't be fully inserted due to case conflict
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The RPi power cable cannot sit fully in the connector, and the lock pins can't engage, because the case gets in the way of the plastic around the end.
As a result we have knocked it out a couple of times and lost power to the system.
Can this be modified or can we get a new case/cable that resolves this issue? |
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Thu Dec 3 16:28:46 2015, CG, TD, New Kapton cable tests at DL 18x
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Spent whole day trying to isolate mezzanines from cooling crate.
Finally managed to increase resistance between crate and mezzanines from ~5 Ohms to ~380 kOhms with some masking tape and parcel tape over the
slots in the FEE modules in which rest the guide pins on the bottom of cooling crate. |
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Fri Jan 15 16:50:09 2016, CG, TD, Ribbon cable + couple tests at DL 20x
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12/01/16 (Attachments 1-8)
FEEs set up as per ELOG entry 136 (15/12/15)
Connected cables as follows: |
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Tue Jan 19 18:09:53 2016, CG, TD, Tuesday 19 january 2016
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18.00 Swapped input cables to nnaida11 and nnaida14
both cables LH coupler + 2x 34-way Samtec ribbon cables + 3M 1245 1.4mil Copper screen w/ground wire
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