Revision as of 21:58, 20 October 2022

Meetings are via ZoomGov: connect (Meeting ID: 160 199 0060 / Passcode 8394)

Thursday, October 21

Continued taking data at 200nA with EMPTY Target Cell till ~14:00, collected ~0.65B events, overall collected data for past period 1.533B events
15:00 Beam was OFF for ~3.5 hours for Injector Restoration
At 16:10 started filling the target with LHe
~17:40 Beam was back, started collecting data with 200nA and FULL target
17:58 FDC:hv:2:c3:3n channel HV tripped, tried to turn it ON, with different ways, but continuously it was tripping, contacted to Lubomir he changed the HV from 500V to 400V [1]
19:20 Target alarm comes ON, the Pulse Tube Refrigerator(PTR) was switched off resulting in increase of the target cell temperatures from 4.27 to about 4.6 K
Same Target Issue happened at 20:50 again, switched back ON the PTR, and in both cases contacted to Chris Carlin, he will keep an eye on it

Continue running on the FULL LHe target at 200nA

Beam was Off most of the day starting from ~7:30am for "ARW Tour and Associated Maintenance" and VCG1L1210(SRF Insulating Vacuum)
- During dawn time Mark and Malte replaced some Fcal bases (2?)
- Vlad and Arshak did some alignment on the prototype
- Kondo conducted some work on GEM-TRD
Restored Beam to the Hall-D at ~22:30, after 15 hours of downtime
After Beam restoration Harp Scan was performed and started run on the Empty LHe4 Cell target with 200nA
Collected for about 0.3B events
At 7:45 meeting informed MCC about beam position instability

Continue running on the Empty target at 200nA

@@ Line 44: / Line 44: @@
-* Shift Summary
+=== Shift Summary ===
 ** [https://logbooks.jlab.org/entry/4063182 Day Oct-19]
 ** [https://logbooks.jlab.org/entry/4063459 Swing Oct-19]