Detector 4
From RHESSI Wiki
(Difference between revisions)
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2015-205-17:22:21 /IDPUTABLE4 OFFSET=FRONTFASTDAC | 2015-205-17:22:21 /IDPUTABLE4 OFFSET=FRONTFASTDAC | ||
2015-205-17:22:30 /IDPLOAD VALUE=0x90 ; was 0x80 | 2015-205-17:22:30 /IDPLOAD VALUE=0x90 ; was 0x80 | ||
+ | |||
+ | * MISSING NOTES? Were changes mad the week of Aug. 12th? | ||
+ | |||
+ | * On Aug 20, 2015 the front fast threshold was raised, in two commands of 16 steps each, in order to lower fast rates and free up livetime. This was successful but probably needs to be repeated. Livetime rose from ~0% to ~50%. The D4 threshold should be raised again to further raise the livetime. | ||
+ | |||
+ | 15-232-22:16:08 start idib_chg_thrshld (3, FRONT, FAST, 0x50) | ||
+ | 15-232-22:16:30 /IDPUDUMPTABL TABLE=DIBTBL3 | ||
+ | 15-232-22:16:30 /IDPUTABLE3 OFFSET=FRONTFASTDAC | ||
+ | 15-232-22:16:41 /IDPLOAD VALUE=0x50 | ||
+ | |||
+ | 15-232-22:17:53 start idib_chg_thrshld (4, FRONT, FAST, 0xA0) | ||
+ | 15-232-22:18:12 /IDPUDUMPTABL TABLE=DIBTBL4 | ||
+ | 15-232-22:18:12 /IDPUTABLE4 OFFSET=FRONTFASTDAC | ||
+ | 15-232-22:18:25 /IDPLOAD VALUE=0xA0 | ||
+ | |||
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|- | |- | ||
| 2015-Jul-24 17:22:30 UTC || 0x90 (was 0x80) | | 2015-Jul-24 17:22:30 UTC || 0x90 (was 0x80) | ||
+ | |- | ||
+ | | 2015-Aug-20 22:18:25 UTC || 0xA0 (was 90) | ||
+ | |- | ||
+ | | 2015-Aug-20 22:19:32 UTC || 0xB0 (was A0) | ||
|- | |- | ||
|} | |} |
Revision as of 21:32, 22 August 2015
This page contains information about changes/issues for RHESSI detector 4 after the 2014 anneal. Detector updates from 2012-mid 2014 can be found here: Detector 4 anneal 2012
Contents |
Notes
After the 2014 anneal, detector 4 is UNSEGMENTED.
- On May 21 starting at 19:24 UTC we raised up the Slow threshold for the Front segment.
15-141-19:24:10 start idib_chg_thrshld (4, FRONT, SLOW, 0x68) --> Was 0x60 15-141-19:24:22 /IDPUDUMPTABL TABLE=DIBTBL4 15-141-19:24:22 /IDPUTABLE4 OFFSET=FRONTSLOWDAC 15-141-19:24:31 /IDPLOAD VALUE=0x68
- Raised front fast threshold due to elevated counts. This change reduced counts and increased livetime
2015-152-17:00:18 /IDPUTABLE4 OFFSET=FRONTFASTDAC 2015-152-17:00:31 /IDPLOAD VALUE=0x60 ; was 0x50
- On 2015 July 7, D4 front fast threshold was raised due to decreased livetime.
2015-188-18:48:17 /IDPUTABLE4 OFFSET=FRONTFASTDAC 2015-188-18:48:34 /IDPLOAD VALUE=0x70 ; was 0x60
- The front fast threshold was increased on July 10 2015 due to low livetime due to high fast rates. This action was effective in raising the livetime.
2015-191-19:21:17 /IDPUTABLE4 OFFSET=FRONTFASTDAC 2015-191-19:21:25 /IDPLOAD VALUE=0x80 ; was 0x70
- The front fast threshold was increased on July 24 2015 due to low livetime due to high fast rates. This action was effective in raising the livetime, to ~90%.
2015-205-17:22:21 /IDPUTABLE4 OFFSET=FRONTFASTDAC 2015-205-17:22:30 /IDPLOAD VALUE=0x90 ; was 0x80
- MISSING NOTES? Were changes mad the week of Aug. 12th?
- On Aug 20, 2015 the front fast threshold was raised, in two commands of 16 steps each, in order to lower fast rates and free up livetime. This was successful but probably needs to be repeated. Livetime rose from ~0% to ~50%. The D4 threshold should be raised again to further raise the livetime.
15-232-22:16:08 start idib_chg_thrshld (3, FRONT, FAST, 0x50) 15-232-22:16:30 /IDPUDUMPTABL TABLE=DIBTBL3 15-232-22:16:30 /IDPUTABLE3 OFFSET=FRONTFASTDAC 15-232-22:16:41 /IDPLOAD VALUE=0x50
15-232-22:17:53 start idib_chg_thrshld (4, FRONT, FAST, 0xA0) 15-232-22:18:12 /IDPUDUMPTABL TABLE=DIBTBL4 15-232-22:18:12 /IDPUTABLE4 OFFSET=FRONTFASTDAC 15-232-22:18:25 /IDPLOAD VALUE=0xA0
D4 front slow LLD threshold history
post 2014 anneal | 0x50 |
2015 May 21 19:24 UTC | 0x70 (was 0x60) |
D4 front fast LLD threshold history
post 2014 anneal | 0x30 |
2014-Dec-8 after 22:05 UTC | 0x50 (was 0x30) |
2015-Jun-02 17:00:31 UTC | 0x60 (was 0x50) |
2015-Jul-07 18:48:34 UTC | 0x70 (was 0x60) |
2015-Jul-07 19:21:25 UTC | 0x80 (was 0x70) |
2015-Jul-24 17:22:30 UTC | 0x90 (was 0x80) |
2015-Aug-20 22:18:25 UTC | 0xA0 (was 90) |
2015-Aug-20 22:19:32 UTC | 0xB0 (was A0) |
D4 rear slow LLD threshold history
post 2014 anneal | 0x30 |
D4 rear fast LLD threshold history
post 2014 anneal | 0x45 |
D4 HV history
post 2014 anneal | 4510 V |