MUST2 SAMURAI_2018 S3-LEB-LPC SUPERNEMO MUGAST EXPAND SCALP GALATRON HiCARI VELO
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Message ID: 5365     Entry time: Sat Jul 27 01:50:28 2019
Author: Freddy, Sylvain 
ExpNbr: e768s 
Type: S1 
Category: General 
Status: Fixed 
Target-Source: N/A 
Subject: Annular detector degradation 
By looking in details to the impact matrix of the annular detector, one can see that more segments than before are missing.

There was a clear degradation between run135 and run140.

HVmonitor summary of leakage current for MG11A:
*Wed Jul 24 21:44:44 2019 ---> 0.2 uA
*Thu Jul 25 06:53:15 2019 ---> 0.6 uA (run135 stop)
*Thu Jul 25 13:23:48 2019 ---> 1.4 uA (during run 140)
*Thu Jul 25 22:25:35 2019 ---> 1.3 uA
*Fri Jul 26 07:26:23 2019 ---> 1.9 uA
*Fri Jul 26 16:27:50 2019 ---> 1.9 uA
*Sat Jul 27 01:29:52 2019 ---> 1.9 uA

Attached is also the output of the HV monitor (~/HV_7.root) where the leakage current increase is visible. I just did not manage to draw it as a function of absolute time because the date stored in the file seems wrong.
Attachment 1: annular_r135_7.png  90 kB  Uploaded Sat Jul 27 02:57:24 2019  | Hide | Hide all
annular_r135_7.png
Attachment 2: annular_r149_0.png  82 kB  Uploaded Sat Jul 27 02:57:32 2019  | Hide | Hide all
annular_r149_0.png
Attachment 3: annular_r152_0.png  85 kB  Uploaded Sat Jul 27 02:57:42 2019  | Hide | Hide all
annular_r152_0.png
Attachment 4: annular_diag_run135_7.pdf  277 kB  Uploaded Sat Jul 27 04:14:59 2019  | Hide | Hide all
annular_diag_run135_7.pdf
Attachment 5: annular_diag_run139_0.pdf  184 kB  Uploaded Sat Jul 27 04:15:09 2019  | Hide | Hide all
annular_diag_run139_0.pdf
Attachment 6: annular_diag_run140_0.pdf  372 kB  Uploaded Sat Jul 27 04:15:17 2019  | Hide | Hide all
annular_diag_run140_0.pdf
Attachment 7: annular_diag_run149_0.pdf  397 kB  Uploaded Sat Jul 27 04:15:29 2019  | Hide | Hide all
annular_diag_run149_0.pdf
Attachment 8: annular_diag_run152_0.pdf  360 kB  Uploaded Sat Jul 27 04:15:41 2019  | Hide | Hide all
annular_diag_run152_0.pdf
Attachment 9: HV7.pdf  960 kB  Uploaded Sat Jul 27 04:58:38 2019  | Hide | Hide all
HV7.pdf

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