Difference between revisions of "December 8, 2023"
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* 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. | * 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 | * 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 | * 10:25 Beam off for cryo escorted access to track down ~700 (liquid) litre/day He loss | ||
| + | ** https://logbooks.jlab.org/entry/4231581 | ||
| Line 56: | Line 58: | ||
= Special Requests = | = Special Requests = | ||
| − | * | + | * Plan for Moller Dec 13 or 14 (single HWP setting) |
Latest revision as of 11:35, 8 December 2023
RC Meeting Information
RC Daily Meetings are at 11:00 (am) via Zoom and in person in the counting house meeting room (2nd floor)
- Zoom remote connection information: https://logbooks.jlab.org/entry/4229331
Useful Links
Current Status
- 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
- High Q2 ==> HMS singles rates are low,
- 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
Current Run Plan
- 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'
Notices in Effect for Shift Crew
- 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
Current Issues
- 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
- 10:25 Beam off for cryo escorted access to track down ~700 (liquid) litre/day He loss
Planned Access to the Hall
Planned Accelerator Configuration Changes
- 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
Special Requests
- Plan for Moller Dec 13 or 14 (single HWP setting)
