Detector 7 anneal 2012
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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. | 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. | 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 | ||
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===D7 front slow LLD threshold history=== | ===D7 front slow LLD threshold history=== | ||
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| post 2012 anneal || 0x22 | | post 2012 anneal || 0x22 | ||
| + | |- | ||
| + | | 2014-May-27 16:57:00 UTC || 0x30 (was 0x22) | ||
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Revision as of 22:15, 28 May 2014
Contents |
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
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) |
D7 rear slow LLD threshold history
| post 2012 anneal | 0x30 |
D7 rear fast LLD threshold history
| post 2012 anneal | 0x45 |
