Detector 7 anneal 2012

Notes

There was an arc that led to a long period of extended noise in D7. See Tohban_Report_2013-07-24 for details.

 D7 HV was stepped down by 10 steps because of this.  (HV adjustment was on July 24, 2013 (day 205) at 19:29:15 UTC).  HV after the stepdown was ~3800 V.  This made no change in the noise level.
 Update as of Aug. 7 2013: David has determined that the noise is not affecting D7 spectroscopy (although the calibration may have changed slightly), and livetime is not being significantly affected, so no further steps will be taken for now.

• 2014 May 27: G7 Front fast threshold was changed to 0x30.

  14-147-16:56:42 /IDPUTABLE7 OFFSET=FRONTFASTDAC
  14-147-16:57:00 /IDPULOAD VALUE=0x30

• 2014 Jun 9: Since the attenuator logic is using G2 only, G7 front fast threshold was raised to see if that might allow G7 to be used again in the attenuator logic.

  14-160-17:01:04 /IDPUDUMPTABL TABLE=DIBTBL7
  14-160-17:01:15 /IDPULOAD VALUE=0x40

D7 front slow LLD threshold history

post 2012 anneal

0x0C

D7 front fast LLD threshold history

post 2012 anneal	0x22
2014-May-27 16:57:00 UTC	0x30 (was 0x22)
2014-Jun-09 17:01:05 UTC	0x40 (was 0x30)

D7 rear slow LLD threshold history

post 2012 anneal

0x30

D7 rear fast LLD threshold history

post 2012 anneal

0x45