Detector 7 anneal 2012: Difference between revisions
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imported>Lglesener No edit summary |
imported>Ayshih (Added tables of threshold changes (none)) |
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===Notes=== | |||
There was an arc that led to a long period of extended noise in D7. See [[Tohban_Report_2013-07-24]] for details. | 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. | 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. | ||
===D7 front slow LLD threshold history=== | |||
{| class="wikitable" | |||
|- | |||
| post 2012 anneal || 0x0C | |||
|} | |||
===D7 front fast LLD threshold history=== | |||
{| class="wikitable" | |||
|- | |||
| post 2012 anneal || 0x22 | |||
|} | |||
===D7 rear slow LLD threshold history=== | |||
{| class="wikitable" | |||
|- | |||
| post 2012 anneal || 0x30 | |||
|} | |||
===D7 rear fast LLD threshold history=== | |||
{| class="wikitable" | |||
|- | |||
| post 2012 anneal || 0x45 | |||
|} | |||
Revision as of 23:36, 17 March 2014
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.
D7 front slow LLD threshold history
| post 2012 anneal | 0x0C |
D7 front fast LLD threshold history
| post 2012 anneal | 0x22 |
D7 rear slow LLD threshold history
| post 2012 anneal | 0x30 |
D7 rear fast LLD threshold history
| post 2012 anneal | 0x45 |