 Sat May 13 11:34:25 2023, TD, RSS, Saturday 13 May
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12.34 DSSSD#3 bias -149.95V leakage current -6.763uA temperature +21.2 deg C ( https://web-docs.gsi.de/~lestinsk/tempplot.php )
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Fri May 12 16:24:20 2023, RSS, TD, V-I test 8x
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Since yesterday evening, the bottom right detector was at -150 V. In the morning, the current was quite stable ~ 6.77 uA. The bias was switched off,
the foils opened, both of the detector arms were moved in and out three times, and the chamber was tightly covered again. A negative bias voltage was applied
from 0 to 150 V in steps of 10 V one by one to all four detectors, and the V-I results can be seen in Attachments 1-4. All detectors seem to be |
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Thu May 11 21:22:54 2023, RSS, TD, V-I test 7x
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Today, the foil was opened, the pins on the bottom right detector were checked and looked fine, the right-hand arm was moved a bit in and then out, and
the foil was tightly closed again. The negative bias voltage was applied from 0 to 50 V in steps of 10 V. During the measurement, the lights in the cave
were switched off to ensure no leakage current from the light*. The results are shown in Attachment 1. To condition the detector, it was left at a negative |
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Wed May 10 19:06:18 2023, RSS, TD, V-I test
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To test the detectors, adaptors were installed on the feed through flanges. A negative bias voltage was applied in steps of 10 V from 0 to 150 V. The
V-I plots are attached for the four detectors. Three detectors - top right, top left, and bottom left (in the direction of the beam) - are fine. For the
bottom right detector (in the direction of the beam), the current was fluctuating and was considerably high (1st test). The adaptors connecting to this |
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Tue May 2 15:02:09 2023, CB, JM, All detectors and harnesses mounted
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Completed mounting harnesses and detectors.
The strain relief support for the bottom most two detectors on the feedthrough side was not mounted because we could not find enough MACOR parts
and mounting flanges. We cannot find them in GSI, possibly they are somewhere not obvious in Edinburgh. |
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Mon May 1 18:21:18 2023, CB, JM, All detectors mounted
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Mounted four detectors on Carme ad well as four cable harnesses.
Cables for new, shorter harnesses appear still too long. Likely the model is not correct somehow. |
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Mon May 1 08:26:09 2023, CB, JM, Left hand detectors remounted
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(31 April)
Remounted 3335-12 on top and new 3335-1 on bottom of left hand plate. Used new dog legs and old standoffs.
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Sun Apr 30 10:01:39 2023, CB, JM, Left hand detectors unmounted 26x
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(29 April)
Inspected CARME after opening. See attached. Some key takeaways.
- No visible damage to the detectors or the Kapton cables. No visible deposits or dust on the detectors either. |
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Sat Apr 29 10:12:58 2023, CB, JM, CARME opened 8x
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(28 April)
Mounted rails on dolly. The rails don't smoothly connect to those on the Aluminium frame and some thin metal shims were required to get the
correct height. A metal support had to be placed above the Delrin pads to support the rails above the gap between frames. |
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Thu Apr 27 19:43:23 2023, CB, JM, Preparing to open
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Removed turbo pump and set aside in a box. Considering switching to the other turbo to avoid degradation due to lack of use.
Installed bellows support and OG devised support to avoid bellows sagging when Carme is split open. |
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Wed Apr 26 16:49:28 2023, CB, JM, CARME dolly mostly built
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Disconnected cables from CARME motors and turbo. The turbo has to go to allow Carme to slide out. Crane may be required to lift because it's in a
very hard spot to access.
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Tue Apr 25 13:22:19 2023, JM, CARME venting
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CARME venting using nitrogen gas bottle.
Coolant pipes dismounted from the chamber
Feed-through flange for n+n bias flange for bottom detector has a bent pin image attached. Clearer image of bent pin for ERNI connector used |
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Mon Apr 24 21:24:26 2023, JM, Preparation for CARME dismount
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CARME currently in vacuum, pressure ~3E-10 mbar. Chamber to be vented tomorrow afternoon by vacuum division. We have active both pirani and hot cathode
gauge to aid.
Equipment removed from the chamber in preparation for dismount of CARME from the ring this week. Equipment removed includes: |
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Wed Mar 22 16:33:32 2023, TD, NIM WR source 8x
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Test of NIM WR source at Edinburgh
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Wed Jan 18 13:32:36 2023, PJCS, MACB settings with either Emulator or VETAR
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When using the VITAR connected to the HDMI port of the root MACB the settings for all the MACB in the system 0x3.
This setting takes the Clock and Data line from the input HDMI and outputs it via teh HDMI output ports.
When using the Emulator connected via the SMA connectors on the back of the root MACB then the setting for the root MACB |
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Thu Dec 8 14:41:19 2022, PJCS, Results of tests on AIDA PSU in DL T9 8x
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We opened one up and soldered a co-ax cable to one of the +6v power contacts at the output of the filter board.
Connecting this to a 'scope we observed a level of +/- 5mv noise with no FEE connected.
Connecting one FEE made little difference. |
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Thu Dec 1 08:56:59 2022, AR TD, Thursday 1 December 11x
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Photos of noise observed at each of the AIDA PSU outputs by digital oscillscope.
DAQ GOing with waveforms enabled.
Connection from AIDA PSU to scope by DMM test probes, twisted cabling, 3mm jack plug/BNC adaptor. |
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Wed Nov 30 08:52:59 2022, AR TD, Wednesday 30 November 26x
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9:40
DSSD bias and leakage current values:
-99.99 V |
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Tue Nov 29 14:37:56 2022, AR TD, Tuesday 29 November 22x
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16:20
DSSD bias and leakage current values:
-99.99 V |
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Mon Nov 28 13:14:33 2022, AR TD, Monday 28 November 12x
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