Detector 2
From RHESSI Wiki
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This page contains information about changes/issues for RHESSI detector 2 after the 2014 anneal. Detector updates from 2012-mid 2014 can be found here: [[Detector 2 anneal 2012]] | This page contains information about changes/issues for RHESSI detector 2 after the 2014 anneal. Detector updates from 2012-mid 2014 can be found here: [[Detector 2 anneal 2012]] | ||
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Detector 2 is UNSEGMENTED (no surprise there) following the 2014 anneal. | Detector 2 is UNSEGMENTED (no surprise there) following the 2014 anneal. | ||
- | * 2014-Aug-21 Due to noise in D2, the HV was lowered by 20 counts to 4117V at 2014-233-20:41:14 UT. This was | + | * 2014-Aug-21 Due to noise in D2, the HV was lowered by 20 counts to 4117V at 2014-233-20:41:14 UT. This was successful in quieting the noise. |
* 2014-Aug-26: D2 is suffering a lot from the known light leak problem. This does not affect the quality of the data but greatly reduces livetime at times when light leaks in through the cryostat port. To alleviate this problem, the G2 front fast threshold was raised from 0x30 to 0x38 at 2014-238-19:22:56 UTC. This didn't seem to fix the problem. | * 2014-Aug-26: D2 is suffering a lot from the known light leak problem. This does not affect the quality of the data but greatly reduces livetime at times when light leaks in through the cryostat port. To alleviate this problem, the G2 front fast threshold was raised from 0x30 to 0x38 at 2014-238-19:22:56 UTC. This didn't seem to fix the problem. | ||
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| GAP IN THRESHOLD VALUES - ADD IN LATER | | GAP IN THRESHOLD VALUES - ADD IN LATER | ||
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- | | 2014-08-29 18:33:28 UTC || 0x40 | + | | 2014-08-29 19:22:56 UTC || 0x38 (was 0x30) |
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+ | | 2014-08-26 18:33:28 UTC || 0x40 (was 0x38) | ||
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| post 2014 anneal || 4510 V | | post 2014 anneal || 4510 V | ||
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+ | | 2014-Aug-21 20:41:14 UTC || 4117V | ||
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Revision as of 23:08, 4 September 2014
This page contains information about changes/issues for RHESSI detector 2 after the 2014 anneal. Detector updates from 2012-mid 2014 can be found here: Detector 2 anneal 2012
Contents |
Notes
Detector 2 is UNSEGMENTED (no surprise there) following the 2014 anneal.
- 2014-Aug-21 Due to noise in D2, the HV was lowered by 20 counts to 4117V at 2014-233-20:41:14 UT. This was successful in quieting the noise.
- 2014-Aug-26: D2 is suffering a lot from the known light leak problem. This does not affect the quality of the data but greatly reduces livetime at times when light leaks in through the cryostat port. To alleviate this problem, the G2 front fast threshold was raised from 0x30 to 0x38 at 2014-238-19:22:56 UTC. This didn't seem to fix the problem.
- Another threshold change to try and fix the light leak issue:
14-241-18:33:28 /IDPUTABLE2 FRONTFASTDAC 14-241-18:33:56 /IDPULOAD VALUE=0x40 ;Front fast from 0x38 to 0x40
D2 front slow LLD threshold history
post 2014 anneal | 0x50 |
D2 front fast LLD threshold history
post 2014 anneal | 0x30 |
GAP IN THRESHOLD VALUES - ADD IN LATER | |
2014-08-29 19:22:56 UTC | 0x38 (was 0x30) |
2014-08-26 18:33:28 UTC | 0x40 (was 0x38) |
D2 rear slow LLD threshold history
post 2014 anneal | 0x30 |
D2 rear fast LLD threshold history
post 2014 anneal | 0x45 |
D2 HV history
post 2014 anneal | 4510 V |
2014-Aug-21 20:41:14 UTC | 4117V |