Revision as of 08:21, 13 March 2024

Wednesday, March 13 2024

Yesterday was efficient (15.5h ABU)
- Photon beam was established and test of the GEM-TRD and GEM started.
- Rapid-access between noon and 14:00 to look at GEM-TRD and GEM.
- Beam back only at 16:40 due to Hall D magnet ramp issue.
- 20:05-20:25 Tagger magnet trip/restoration

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)
Transmission looks decent: 5kHz rate in the PSC counters compared to expected 8.7kHz for optimal, converging, beam (100 nA, 2×10^-5 RL 750um TPOL converter)

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

- Access to tagger today or Wednesday to look at amorphous radiator/harp motor?
- Man shifts for Friday day/swing?

@@ Line 1: / Line 1: @@
 = Wednesday, March 13 2024=
 === Past 24 hours ===
-* Yesterday was efficient
+* Yesterday was efficient (15.5h ABU)
 ** Photon beam was established and test of the GEM-TRD and GEM started.
 ** Rapid-access between noon and 14:00 to look at GEM-TRD and GEM.
@@ Line 13: / Line 13: @@
-* ABUs:  h
+* ABUs: 15.5 h
 <!-- * Data Summary:  B triggers on empty target -->