Detector 1
From RHESSI Wiki
(Difference between revisions)
(→D1 rear fast LLD threshold history) |
(→D1 front fast LLD threshold history) |
||
Line 115: | Line 115: | ||
| post 2016 anneal || 0x22 | | post 2016 anneal || 0x22 | ||
|- | |- | ||
- | | 2017-Apr- | + | | 2017-Apr-18 00:43:46 || 0x80 |
|} | |} | ||
Revision as of 17:05, 19 April 2017
This page contains information about changes/issues for RHESSI detector 1 after the 2014 anneal. Detector 1 updates from 2012-mid 2014 can be found here: Detector 1 anneal 2012
Contents |
Post 2014 Anneal
Detector 1 is SEGMENTED following the 2014 anneal (yay!)
- The rear fast threshold was changed on July 13 2015 due to dropping livetime in the rear:
2015-194-16:33:58 /IDPUTABLE1 OFFSET=REARFASTDAC 2015-194-16:34:12 /IDPLOAD VALUE=0x50 ; was 0x45
- The rear fast threshold was changed on July 24 2015 due to low livetime. However, the change probably wasn't needed; the tohban hadn't noticed that a change had already been made a few days ago. The next tohban can reverse the change if desired.
2015-205-17:18:59 /IDPUTABLE1 OFFSET=REARFASTDAC 2015-205-17:19:08 /IDPLOAD VALUE=0x70 ; was 0x60
- The rear fast threshold was changed on Sep 9 2015 due to low livetime.
2015-252-17:51:10 /IDPUTABLE1 OFFSET=REARFASTDAC 2015-252-17:51:17 /IDPLOAD VALUE=0x80 ; was 0x70
- On October 8, 9, and 12, the rear fast threshold was raised three times to try and raise livetime. Results still need to be assessed.
2015-281-21:50:13 /IDPUTABLE1 OFFSET=REARFASTDAC 2015-281-21:50:24 /IDPLOAD VALUE=0xA0 ; was 0x90
2015-282-19:55:48 /IDPUTABLE1 OFFSET=REARFASTDAC 2015-282-19:55:58 /IDPLOAD VALUE=0xB0 ; was 0xA0
2015-285-21:51:28 /IDPUTABLE1 OFFSET=REARFASTDAC 2015-285-21:51:37 /IDPLOAD VALUE=0xC0 ; was 0xB0
- Also on October 12, the front fast threshold on D1 (and also D7) was raised. This is to try and top off the livetime used in the attenuator logic. It might not work, since the fast rates are not terribly high for this detector, in which case the change could be reversed by a future tohban. Check this and see..
2015-285-20:16:55 /IDPUTABLE1 OFFSET=FRONTFASTDAC 2015-285-20:17:03 /IDPLOAD VALUE=0x50 ; was 0x40
- On November 6, 7, 8. the rear fast threshold was raised three times to try and raise livetime. At 0xFF the live time is at 70%
2015-312-06:16:29 /IDPUTABLE1 OFFSET=REARFASTDAC 2015-312-06:16:52 /IDPLOAD VALUE=0xE0 ; was 0xD0
2015-313-19:22:53 /IDPUTABLE1 OFFSET=REARFASTDAC 2015-313-19:23:03 /IDPLOAD VALUE=0xF0 ; was 0xE0
2015-314-18:55:49 /IDPUTABLE1 OFFSET=REARFASTDAC 2015-314-18:56:05 /IDPLOAD VALUE=0xFF ; was 0xFF
- 2015 December 14 lowered HV by 200 V in an attempt to reduce D1 rear, fast rates
2015-348-18:19:00 /IHVDAC DETECTOR=1, VOLTAGE=176 ; 34-6.8 V
- 2015 December 28 lowered HV by 200 V in an attempt to reduce D1 dead time
2015-362-09:13:58 /ihvdac detector=1, voltage=166 ; Lowered G1 HV by 200V
- 2016 January 13 lowered HV to 2500 V
2016-013-21:20:47 /IHVDAC DETECTOR=1, VOLTAGE=129 ; 2500 V
- 2016 January 27 lowered HV to 1500 V
2016-027-20:16:13 /IHVDAC DETECTOR=1, VOLTAGE=77 ; 1500V from 2000V
Post 2016 Anneal
- March 18, 2016 - Turned off D1
2016-139-18:53:32 /ihvdac detector=1, voltage=0 2016-139-18:56:49 /idibpwroff value=1
- 2016 April 27 (DOY 118): Started turning on D1. HV reached 3995 V by April 29, ~03:40
16-119-00:49:49 start ihv_ramp_stage1_g1_g4_g7 (HV = 0x0A, ~200 V) 16-119-02:27:48 start ihv_ramp_stage2_g1_g4_g7 (HV = 0x33, 980 V) 16-119-04:08:00 start ihv_ramp_stage3_g1_g4_g7 (HV = 0x67, 1985 V) 16-120-00:22:16 start ihv_ramp_stage4_g1_g4_g7 (HV = 0x9A, ~3000 V) 16-120-02:01:36 start ihv_ramp_stage5_g1_g4_g7 (HV = 0xB3, ~3500 V) 16-120-03:41:12 start ihv_ramp_stage6_g1_g4_g7 (HV = 0xCE, 3995 V)
- 2016 June 27-28: Turned on D1 again. The final HV is 4000 V. The front and rear counts looked good. D1's front live time was around 98.6 % and the rear
live time was about 97.8 % The last commanding was at DOY180-20:54 UTC.
- 2016 July 4: D1 turned off to reduce temperature load.
- 2017 January 26: D1 turned off.
2017-026-16:00:18 /ihvdac detector=1, voltage=0 ; detector 1 off
- 2017 April 3: Turned on in response to high solar activity. HV was raised to ~1000V at 16:25 and then up to ~2000V at 19:45 UT.
- 2017 April 17: Events turned on in response to high solar activity. Adjustment of Front Fast and Rear Fast thresholds.
2017-107-21:32:05 start ihv_ramp_stage2_g1 ; 1000 V 17-107-23:09:42 start ihv_ramp_stage3_g1 17-108-00:43:46 start idib_chg_thrshld(1, FRONT, FAST, 0x80) 17-108-00:45:22 start idib_chg_thrshld(1, REAR, FAST, 0x60)
D1 front slow LLD threshold history
post 2014 anneal | 0x0C |
post 2016 anneal | 0x0c |
D1 front fast LLD threshold history
post 2014 anneal | 0x22 |
2015-May-12 21:01:12 | 0x30 (was 0x22) |
2015-May-12 21:10:35 | 0x40 (was 0x30) |
2015-Oct-12 20:17:03 | 0x50 (was 0x40) |
post 2016 anneal | 0x22 |
2017-Apr-18 00:43:46 | 0x80 |
D1 rear slow LLD threshold history
post 2014 anneal | 0x30 |
post 2016 anneal | 0x30 |
D1 rear fast LLD threshold history
post 2014 anneal | 0x45 |
2015-Jul-13 16:34:12 | 0x50 (was 0x45) |
2015-Jul-24 17:19:08 | 0x70 (was 0x60) |
2015-Sep-9 17:51:17 | 0x80 (was 0x70) |
2015-Sep-17 06:36:06 | 0x90 (was 0x80) |
2015-Oct-08 21:50:24 | 0xA0 (was 0x90) |
2015-Nov-06 06:16:52 | 0xE0 (was 0xD0) |
2015-Nov-07 19:23:03 | 0xF0 (was 0xE0) |
2015-Nov-08 18:56:05 | 0xFF (was 0xF0) |
?? | 0x50 |
2017-Apr-18 00:45:22 | 0x60 (was 0x50) |
D1 HV history
post 2014 anneal | 3995 V |
2015-Dec-14 18:19:00 UTC | 3407V |
2015-Dec-28 09:13:00 UTC | 3210V |
2016-Jan-13 21:20:47 UTC | 2500V |
2016-Jan-27 20:16:13 UTC | 1500V |
post 2016 anneal | 3995 V |
2016-Jul-04 | 0V |
2017-Jan-26 | 0V |
2017-Apr-3 | 2000 V |
2017-Apr-11 | 0 V |