Detector 3

This page contains information about changes/issues for RHESSI detector 3 after the 2014 anneal. Detector updates from 2012-mid 2014 can be found here: Detector 3 anneal 2012

Notes

Detector 3 is SEGMENTED following the 2014 anneal (yay!)

• 2014-Aug-26: D3 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 G3 rear fast threshold was raised from 0x45 to 0x50 at 2014-238-19:22:56 UTC. This didn't seem to fix the problem.

• Another threshold change b/c of light leak:

 14-241-18:34:11 /IDPUTABLE3 REARFASTDAC  ;Load address 0x25CC 
 14-241-18:34:31 /IDPULOAD VALUE=0x60     ;Rear fast from ox50 to 0x60

• Front Fast threshold increase due to light leak. This lowered fast counts and increased livetime

2015-152-16:58:07 /IDPUTABLE3 OFFSET=FRONTFASTDAC
2015-152-16:58:16 /IDPLOAD VALUE=0x30  ; was 0x22

D3 front slow LLD threshold history

post 2014 anneal

0x0C

D3 front fast LLD threshold history

post 2014 anneal	0x22
2015-06-03 16:58:16 UTC	0x30 (was 0x22)

D3 rear slow LLD threshold history

post 2014 anneal

0x30

D3 rear fast LLD threshold history

post 2014 anneal	0x45
2014-08-26 19:22:56 UTC	0x50 (was 0x45)
2014-08-29 18:33:28 UTC	0x60 (was 0x50)

D3 HV history

post 2014 anneal

3995 V