Detector 8
From RHESSI Wiki
(Difference between revisions)
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* On June 11 2015 the front fast threshold was raised because the fast rates were high and the livetime was low. This action was NOT successful in reducing the fast rates -- they dropped ever so slightly but not much. Therefore, the livetime remained low. | * On June 11 2015 the front fast threshold was raised because the fast rates were high and the livetime was low. This action was NOT successful in reducing the fast rates -- they dropped ever so slightly but not much. Therefore, the livetime remained low. | ||
| + | |||
| + | * Late July 2015: D8 rear has not been returning good data since mid-May, but it was noticed that its fast threshold was never turned up all the way. On July 24 2015 the rear fast threshold was maxed out to see if that recovered a usable level of events from this detector. Unfortunately, it was not successful. | ||
| + | 2015-205-17:21:40 /IDPUTABLE8 OFFSET=REARFASTDAC | ||
| + | 2015-205-17:21:50 /IDPLOAD VALUE=0xFF ; was 0xD0 | ||
| + | |||
===D8 front slow LLD threshold history=== | ===D8 front slow LLD threshold history=== | ||
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|2015-May-04 20:49:54 || 0xC0 (was 0xB0) | |2015-May-04 20:49:54 || 0xC0 (was 0xB0) | ||
| + | |- | ||
| + | |2015-Jul-24 17:21:50 || 0xFF (was 0xD0) | ||
| + | |- | ||
|} | |} | ||
Revision as of 07:06, 31 July 2015
'This page contains information about changes/issues for RHESSI detector 8 after the 2014 anneal. Detector updates from 2012-mid 2014 can be found here: Detector 8 anneal 2012
Contents |
Notes
Detector 8 is SEGMENTED after the 2014 anneal!
On March 13, 2015 the rear fast threshold was changed.
15-072-22:05:41 /IDPUTABLE8 OFFSET=REARFASTDAC 15-072-22:05:56 /IDPLOAD VALUE=0x55
- On April 7 2015, the rear fast threshold was changed due to extremely low livetime in the rear segment. It is not clear if this helped; the action will probably be repeated.
15-097-19:57:24 /IDPUTABLE8 OFFSET=REARFASTDAC 15-097-19:57:37 /IDPLOAD VALUE=0x70 ; was 0x65
- On April 9 2015, the rear fast threshold was changed due to low livetime in the rear segment.
15-099-17:38:09 /IDPUTABLE8 OFFSET=REARFASTDAC 15-099-17:38:23 /IDPLOAD VALUE=0x80 ; was 0x70
- On April 13 at 17:47UT we changed the Rear Fast threshold for detector 8.
15-103-17:46:36 /IDPUTABLE8 OFFSET=REARFASTDAC 15-103-17:46:47 /IDPLOAD VALUE=0x90 ; was 0x80
- On April 14 at 17:25 UT we changed the Rear Fast threshold for detector 8.
15-104-17:25:11 /IDPUTABLE8 OFFSET=REARFASTDAC 15-104-17:25:22 /IDPLOAD VALUE=0xA0 ; was 0x90
- On April 24 at 19:14 UT Rear Fast Threshold was increased.
15-114-19:14:10 /IDPUTABLE8 OFFSET=REARFASTDAC 15-114-19:14:20 /IDPLOAD VALUE=0xB0 ; was 0xA0
- On May 4 at 20:49 UT Rear Fast Threshold was increased
15-124-20:49:54 /IDPUTABLE8 OFFSET=REARFASTDAC 15-124-20:50:09 /IDPLOAD VALUE=0xC0 ; was 0xB0
- On June 11 2015 the front fast threshold was raised because the fast rates were high and the livetime was low. This action was NOT successful in reducing the fast rates -- they dropped ever so slightly but not much. Therefore, the livetime remained low.
- Late July 2015: D8 rear has not been returning good data since mid-May, but it was noticed that its fast threshold was never turned up all the way. On July 24 2015 the rear fast threshold was maxed out to see if that recovered a usable level of events from this detector. Unfortunately, it was not successful.
2015-205-17:21:40 /IDPUTABLE8 OFFSET=REARFASTDAC 2015-205-17:21:50 /IDPLOAD VALUE=0xFF ; was 0xD0
D8 front slow LLD threshold history
| post 2014 anneal | 0x0C |
D8 front fast LLD threshold history
| post 2014 anneal | 0x22 |
| 2015-Jun-11 20:18:18 | 0x30 (was 0x22) |
D8 rear slow LLD threshold history
| post 2014 anneal | 0x30 |
D8 rear fast LLD threshold history
| post 2014 anneal | 0x45 |
| 2015-Mar-13 22:05:56 | 0x55 (was 0x45) |
| 2015-Mar-25 19:30:35 | 0x65 (was 0x55) |
| 2015-Apr-07 19:58 | 0x70 (was 0x65) |
| 2015-Apr-09 17:38:23 | 0x80 (was 0x70) |
| 2015-Apr-13 17:46:47 | 0x90 (was 0x80) |
| 2015-Apr-14 17:25:22 | 0xA0 (was 0x90) |
| 2015-Apr-24 19:14:20 | 0xB0 (was 0xA0) |
| 2015-May-04 20:49:54 | 0xC0 (was 0xB0) |
| 2015-Jul-24 17:21:50 | 0xFF (was 0xD0) |
D8 HV history
| post 2014 anneal | 3995 V |
| 2015-May-8 22:33:30 | 3554 V (was 3995 V) |
| 2015-May-12 21:03:52 | 2573 V (was 3554 V) |
