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User name V. Sulkosky
Log entry time 17:17:25 on November 01, 2009
Entry number 297110
Followups:
- 297111 11/01/09 17:40 Ramesh/Dianc Left HRS S1 PMTs are after-pulsing
- 297189 11/02/09 17:36 V. Sulkosky L-HRS S1 Estimate of Noise
Figures 1 and 2 show the ADC and TDC spectra for the left HRS S1 detector.
These plots are from run 25162 and prior to my final HV changes for today.
The left side # 1 PMT has fairly low gain at comparable HV to other PMTs.
The TDC spectra are fairly noisy. Ramesh is supposed to look into this.
There is some concern that the PMTs might be after-pulsing for S1. This
behavior was not seen during the 3He(e,e'd) experiment for the left HRS.
LHRS S1 ADC (0-5)
LHRS S1 TDC (0-5)
