Detector 6 anneal 2012

From RHESSI Wiki

Revision as of 19:11, 11 April 2014 by Okamitsuo (Talk | contribs)
Jump to: navigation, search

Contents

Notes

Detector 6 had no notable issue since the 2012 anneal until the noise/livetime problem occurred in 2014 Jan.

On 2014 Jan 3, Hugh Hudson noticed that the attenuator system has been in state 3 for a few days. It turned out that, in Detector 6 (both front and rear), livetime was decreasing rapidly and preamp-reset and FAST LLD were also rapidly increasing (See also Tohban_Report_2014-01-08). Then, over the next few days, several adjustments were made to D6 high voltage and FAST threshold (both front and rear) as described below.


   14-004-06:54:40 /ihvdac detector=6, voltage=198
   14-005-08:14:37 /ihvdac detector=6, voltage=148   (2868 V)
   14-005-08:16:00 /ihvdac detector=6, voltage=138   (2671 V)
   14-006-08:03:32 /idpudumptabl dibtbl6
   14-006-08:03:57 /idputable6 frontfastdac
   14-006-08:04:08 /idpuload value=0x50
   14-008-07:35:20 /idputable6 rearfastdac
   14-008-07:35:40 /idpuload value=0x55
   14-008-07:36:03 /idputable6 rearfastdac
   14-008-07:36:56 /idpuload value=0x60
   14-008-07:37:49 /ihvdac detector=6, voltage=148
   14-008-07:39:15 /ihvdac detector=6, voltage=158 (3063 V)
   14-008-09:15:22 /ihvdac detector=6, voltage=168 (3259 V)
   14-008-09:18:13 /idputable6 frontfastdac
   14-008-09:18:39 /idpuload value=0x64
   14-008-09:24:57 /idputable6 frontfastdac
   14-008-09:25:28 /idpuload value=0x50
   14-076-20:34:17 /IDPUTABLE6 FRONTFASTDAC 14-076-20:34:33 /IDPULOAD VALUE=0xA0  ;Was 0x90
   14-076-23:45:02 /IHVDAC DETECTOR=6, VOLTAGE=148 (lowered from 168) 14-076-23:46:05 /IHVDAC DETECTOR=6, VOLTAGE=128 (2474 V)
   14-077-01:23:14 /IHVDAC DETECTOR=6, VOLTAGE=138 (raised from 128) 14-077-01:24:40 /IHVDAC DETECTOR=6, VOLTAGE=148 14-077-01:26:08 /IHVDAC DETECTOR=6, VOLTAGE=158 (voltage ramp halted at 3064 V)
   14-077-23:30:17 /IDPUTABLE6 FRONTFASTDAC 14-077-23:30:46 /IDPULOAD VALUE=0xB0
   14-080-23:00:26 /IDPUTABLE6 FRONTFASTDAC
   14-080-23:00:51 /IDPULOAD VALUE=0xC0
   14-086-18:17:40  /IDPUTABLE6 FRONTSLOWDAC
   14-086-18:17:52  /IDPULOAD VALUE=0x20
   14-088-19:16:26 /IDPUTABLE6 FRONTSLOWDAC
   14-088-19:16:40 /IDPULOAD VALUE=0x30
   14-097-17:15:14 /IHVDAC DETECTOR=6, VOLTAGE=138 ; was 148
   14-100-18:09:31 /IDPUTABLE6 FRONTFASTDAC
   14-100-18:09:44 /IDPULOAD VALUE=0xD0
   14-101-17:54:57 /IDPUTABLE6 FRONTFASTDAC
   14-101-17:55:11 /IDPULOAD VALUE=0xE0

D6 front slow LLD threshold history

post 2012 anneal 0x0C
2014-Feb-05 20:27 UTC 0x1A (was 0x0C)
2014-Mar-27 18:17:52 UTC 0x20 (was 0x1A)
2014-Mar-29 19:16:40 UTC 0x30 (was 0x20)

D6 front fast LLD threshold history

post 2012 anneal 0x22
2014-Jan-06 08:04:08 UTC 0x50 (was 0x22)
2014-Jan-06 09:18:39 UTC 0x64 (was 0x50)
2014-Jan-06 09:25:28 UTC 0x50 (was 0x64)
2014-Jan-28 22:13 UTC 0x60 (was 0x50)
2014-Jan-29 22:11 UTC 0x70 (was 0x60)
2014-Feb-27 19:25 UTC 0x80 (was 0x70)
2014-Mar-11 03:00 UTC 0x90 (was 0x80)
2014-Mar-17 20:34:33 UTC 0xA0 (was 0x90)
2014-Mar-18 23:30:17 UTC 0xB0 (was 0xA0)
2014-Mar-21 23:00:51 UTC 0xC0 (was 0xB0)
2014-Apr-10 18:09:44 UTC 0xD0 (was 0xC0)
2014-Apr-11 17:55:11 UTC 0xE0 (was 0xD0)

D6 rear slow LLD threshold history

post 2012 anneal 0x30

D6 rear fast LLD threshold history

post 2012 anneal 0x45
2014-Jan-08 07:35:40 UTC 0x55 (was 0x45)
2014-Jan-08 07:36:56 UTC 0x60 (was 0x55)
Personal tools
Namespaces
Variants
Actions
Navigation
Toolbox