Detector 2
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* Front Slow Threshold again raised. No appreciable difference in livetime or slow counts | * Front Slow Threshold again raised. No appreciable difference in livetime or slow counts | ||
| - | 2015-152-17:01:00 /IDPUTABLE2 OFFSET=FRONTSLOWDAC | + | 2015-152-17:01:00 /IDPUTABLE2 OFFSET=FRONTSLOWDAC |
| - | 2015-152-17:01:16 /IDPLOAD VALUE=0x70 ; was 0x58 | + | 2015-152-17:01:16 /IDPLOAD VALUE=0x70 ; was 0x58 |
===D2 front slow LLD threshold history=== | ===D2 front slow LLD threshold history=== | ||
Revision as of 17:42, 3 June 2015
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
- Front Fast rates have become significantly worse, requested a threshold change
14-260-16:36:36 /IDPUTABLE2 OFFSET=FRONTFASTDAC 14-260-16:36:51 /IDPULOAD VALUE=0x50
- Front Slow Threshold was changed on May 21
15-141-19:22:50 start idib_chg_thrshld (2, FRONT, SLOW, 0x58) --> Was 0x50 15-141-19:23:05 /IDPUDUMPTABL TABLE=DIBTBL2 15-141-19:23:05 /IDPUTABLE2 OFFSET=FRONTSLOWDAC 15-141-19:23:19 /IDPLOAD VALUE=0x58
- Front Slow Threshold again raised. No appreciable difference in livetime or slow counts
2015-152-17:01:00 /IDPUTABLE2 OFFSET=FRONTSLOWDAC 2015-152-17:01:16 /IDPLOAD VALUE=0x70 ; was 0x58
D2 front slow LLD threshold history
| post 2014 anneal | 0x50 |
| 2015 May 21 19:22:50 UTC | 0x58 (was 0x50) |
| 2015 Jun 2 17:01:16 UTC | 0x70 (was 0x58) |
D2 front fast LLD threshold history
| post 2014 anneal | 0x30 |
| 2014-08-29 19:22:56 UTC | 0x38 (was 0x30) |
| 2014-08-26 18:33:28 UTC | 0x40 (was 0x38) |
| 2014-260-16:36:51 UTC | 0x50 (was 0x40) |
| 2014-09-22 20:37:41 UTC | 0x60 (was 0x50) |
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 |
