RC Meeting Information

RC Daily Meetings are at 11:00 (am) via Zoom and in person in the counting house meeting room (2nd floor)

Useful Links

HMS Chamber 2V1 looks ok now (verify efficiencies in 50K reports)
Production on KinC_x50_2 and _2'
- High Q2 ==> HMS singles rates are low,
  - Coincidence event rates are low (~500 Hz)
  - Data Rates << 100 MBy/sec
- NPS singles rates are moderate to high
  - KinC_x50_2 @ 30 uA hTRIG1 = 1 MHz
Yesterday tried for 36 uA on LH2 at KinC_x50_2
- Bailed out after approx 1 hour of MCC tuning
- At 8:00 am meeting, Crew Chief offered to try again for 36 uA, but did not promise less than 1 hour tuning.
- Decided to stay at max 30 uA running for weekend

Continue run plan: https://hallcweb.jlab.org/wiki/index.php/Short_Term_Run-Plan
- complete 1st cycle of KinC_x50_2 then move to KinC_x50_2'

All shifts should come in as planned.
Heidi on vacation 7-13 Dec. Contact Steve L for cryo during that time.
- cc Heidi on any cryo logbook entry (fansler@jlab.org)
Physically verify green led of gas flow and BCM temps in electronics room
Shift Leader: Record HMS (electron) tracking efficiency from each 50K replay report

On call list seems incomplete and should be addressed by the Hall: https://logbooks.jlab.org/entry/4230495
We need other indications of this interlock. In Hall A, we have it shut off detector HV via the alarm handler, and we have a flow rate alarm. Seems the useful PV values have not been working since 1-Sept.
NPS PMT/Base failures are propagating into columns 9, 10, 11
- https://logbooks.jlab.org/files/2023/12/4231574/nps_hms_coin_3454_50k.pdf
10:25 Beam off for cryo escorted access to track down ~700 (liquid) litre/day He loss
- https://logbooks.jlab.org/entry/4231581

We will run until 07:00 Dec 15.
- Target will be warmed up and parked.
- Hall will remain in Controlled Access until 07:00 Dec 19
- Beam studies (Day Shift) Dec 19 will send beam into hall
- Hall will return to Controlled Access at 16:00 on Dec 19