|
HOME
ESR
EXPERIMENTS
LABS etc
|
|
E121
E127
E132
E125
E143
laser_cooling_2021
E142
Ê128
E146
E0052
E0018
E0028
E0038
|
| Nuclear hyperfine mixing in 229Th89+ |
Not logged in |
 |
|
|
|
Message ID: 191
Entry time: Sun Apr 10 03:56:56 2022
|
| Author: |
V. Hannen |
| Category: |
Detectors |
| Subject: |
Low rate in PMT South |
|
|
PMT south shows a much lower count rate than observed in elog entry 170.
Yesterday the voltage on this PMT was increased to 2400 V and the threshold setting of the CAEN CFD to 90 units, (from 70 units before) however the low readout rate was already apparent both for the analog and the discriminated signal then.
Update Sun Apr 10, 21:45: on advice from D. Winters, increased the PMT voltage to 2500 V (max. the HV supply can do, the PMT could handle up to 3000 V) |
|