 Wed Feb 16 12:43:05 2022, TP, RSS, Alpha background run40 11x
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13:30
Check Leakage current: (see attachment 1)
Check NewMerger tab: (see attachment 2) |
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Wed Feb 16 08:27:27 2022, TP, RSS, Alpha background run40 11x
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09:15
Check Leakage current: (see attachment 1)
Check NewMerger tab: (see attachment 2) |
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Tue Feb 15 21:28:14 2022, JM, Noisy Channels
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All fees and asics checked to find noisy channels. Channels are listed along with the noise peak height for the low energy plot at 22:00. Run started
~17:45.
Attachment 1 shows 3*L for aida01 with x axis zoomed in on noise peak. Attachment 2 shows stat for aida01-04 in log scale. |
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Tue Feb 15 14:59:37 2022, JM, CB, RJC, Pulser walkthrough 11x
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16:00
Check Fee temperatures: all green (see attachment 1)
Check statistics tab: ADC data items (see attachment 2) |
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Tue Feb 15 10:46:37 2022, RSS, LV, CB, Alpha background run37 10x
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11:30
Check Fee temperatures: all green (see attachment 1)
Check statistics tab: ADC data items (see attachment 2) |
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Mon Feb 14 09:56:39 2022, CB, Shifters instructions 2022 10x
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EMERGENCY SHUTDOWNS
1. CARME motors: Q key on keyboard while on workspace 1 of appc218 (right of this double-monitor setup)
2. Internal target: Q on keyboard while on workspace 3 of appc218, go to server room, press "CLOSE" button on DUMP. |
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Sun Feb 13 21:28:35 2022, JM, CB, Alpha background Run 32, 35 6x
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Alpha background gathered from 17:35 12/2/22 to 13:44 13/2/22 is run32. Run time ~20 hours. Some alphas visible in aida1 1*L histograms attached.
Noticed grounding of crimps that attched to cryring ground has come loose. Those crimps not ideal for our grounding cable so were loose. Grounding
cable from each fee now meet at a single grounding cable joined by an m3 nut and bolt. This grounding cable then goes to the cryring ground and |
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Sat Feb 12 19:48:38 2022, JM, CB, Grounding and movement tests 11x
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> Initial grounding see final grounding from elog 187. ASIC settings for all - LEC slow comparator 0x64. Note on 11/02/22 1.8*L widths with same settings
were aida1-4: 300,240,250,260
ADC data items <10k |
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Thu Feb 10 09:12:41 2022, OH, CB, US, Hourly motor movement
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To test effect of the motors on the leakage current, they were cycled once per hour overnight at approximately 50 minutes past the hour. - attachment 1
Leakgage current was seen to decrease slowly overnight before flattening out.
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Wed Feb 9 08:01:41 2022, OH, CB, G-HC, Results from no beam overnight
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08:52 Overnight the DAQ was left running to check if there was any individual radioactivity in the Si.
This is stored in R7_75
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Tue Feb 8 08:13:53 2022, OH, CB, DF, Hopefully effect of beam tuning on detectors 9x
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09:00 Detector still biased to 60V and leakage current has been mostly stable overnight.
Only minor fluctuations observed - attachment 1
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Mon Feb 7 08:09:50 2022, OH, CB and PH, CARME Server setup and initial tests
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09:09 Arrived at GSI for comissioning beamtime.
CARME currently in a stopped state, with all FEEs powered off.
Upper detector is biased with 80V and has a leakage current of 9.92uA.
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Fri Feb 4 12:49:54 2022, TD, JM, Grounding Tests and current status 10x
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JM plans to install new crimped, 3mm dia copper drain wires (a la AIDA@DESPEC) this afternoon.
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Fri Feb 4 09:53:48 2022, JM, TD, OH (remotely), Alpha spectra overnight 8x
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DAQ was left running last night from 19:30. Detector bias 80V with a leakage current ~3.4 uA. Pulser OFF.
Observed alphas in spectra overnightin the 20,000 to 28,000 channel range for the pn side and 36,000 to 44,000 range on the nn side of the detector.
Zero energy noise peak is at channel 32000. |
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Thu Feb 3 22:05:33 2022, JM, TD, OH(remotely), Bias update and grounding
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9:30 Bias remained stable overnight - 60V 2.95 uA.
10:00 No grounding attached initailly. Pulser ON, lots of noise across all ~250-300 kHz across biased detector. Waveforms and histograms saved
to /tmp. Pulser width for aida 6 ~300 channels. Aida 7,8 similar, aida 5 producing no ADC data. |
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Wed Feb 2 21:53:32 2022, JM, TD, Detector Bias
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FEE mounts for 5,6,7,8 disassembled to access adaptor boards. No sign of debris which could cause short on adaptor boards.
Adaptor boards removed and checked against spares with multimeter. Both show same characteristics. Pins on feedthrough checked using multimeter.
No longer see -18.5 KOhm between bias pins, no see 140 kOhm which is similar to bias pin to non bias pin from prevous tests. |
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Tue Feb 1 14:43:20 2022, JM, TD, Detector Bias, FEEs
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Detector is not biasing as it has in previous tests. Last bias 15/1/22 see previous elogs, max leakage current ~10 uA at 150V
Detector bias increases well above 10uA for voltages as low as 30-40V. Optical windows covered, Y09 valves closed, large ion pump OFF and both
ion gauges OFF produces similar results but with a slightly lower leakage current. |
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Mon Jan 31 08:58:38 2022, OH, TD, JM, centos server configuration 8x
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Steps taken:
- MIDAS_Releases, Embedded and Exports files brought across from the previously working SL6 aida-gsi install. Brought as tar balls to preserve ownership
- dhcpd.conf set up with same IP addresses as used on the SL6 install from aida-gsi
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Sat Jan 29 11:04:07 2022, JM, OH, Grounding and Pulser
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Grounding
Ground cables have been daisy chained together from FEE to FEE. Ground cables are screwed into a feee bolt hole on the FEE body using an M3 bolt.
LEMO cables have been connected in a similar way between the grounds on the adaptor boards for each FEE. Short LEMO cables go between J6 on pairs |
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Thu Jan 27 21:33:40 2022, JM, OH, AIDA config files, remote access, motor test
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Power, Ethernet and HDMI cables connected to FEEs. To prevent cables coming out of connectors, power and HDMI cables are zip tied to FEE cooling pipe
(see attached image).
Correct FEE MAC addresses have been updated in /etc/dhcp/dhcpd.conf |