Revision as of 08:17, 12 March 2024

Tuesday, March 12 2024

6:37 LCW fluctuation tripped PS magnet.
Hall C pass change completed early afternoon. Then, Ops started to tune hall D beam.
17:30 Ops starting to tune beam to Hall D tagger.
23:30 Although the first amorphous radiator motion was normal, it got stuck in its way to get retracted.
- Hovanes reduced motor speed to 30% of nominal
- We decided to drop the program on 10^-4 and 3*10^-4 RL radiators, as well as Ion Chambers threshold calib. on those. We also drop the plan for our Harp scan since it uses the same motor.
01:05 radiator motion issue again despite reduced speed
03:20 Ion Chamber calibration done (2*10^-5 radiator only because of motor issue)
05:20 Active Collimator calibration done (high gain only because of radiator motor issue)

Amo radiator/harp motor.
Notable bleedthrough (unexpected but not an issue?). It is clearly correlated with beam on in Hall C. It seems it was fixed during the night

Questions:
- Access to tagger to look at amorphous radiator/harp motor?
- Man shifts for Friday day/swing?

@@ Line 9: / Line 9: @@
 * 01:05 [https://logbooks.jlab.org/entry/4265328 radiator motion issue again despite reduced speed]
 * 03:20 Ion Chamber calibration done (2*10<sup>-5</sup> radiator only because of motor issue)
-* 05:20 Active Colimator calibration done (high gain only because of radiator motor issue)
+* 05:20 Active Collimator calibration done (high gain only because of radiator motor issue)
 *MCC Harp scans: [https://logbooks.jlab.org/entry/4265217 5C00], [https://logbooks.jlab.org/entry/4265288 5C11], [https://logbooks.jlab.org/entry/4265289 5C11b]