December 6, 2023
From HallCWiki
Contents
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
- Re-establishing beam last night was fairly straightforward.
- Harp scan: https://logbooks.jlab.org/entry/4230234
- Carbon hole: https://logbooks.jlab.org/entry/4230269
- YAG viewer not working
- Target was ready so we proceeded with run plan
- Injector expert called back in because MCC for some reason thought we didn't need high current (>5-10uA)
- Discovered that the HMS DC had no gas due to having been tripped by someone shutting off the fan in the HMS hut. This likely happened this morning when we think facilities was investigating the AC issue here: https://logbooks.jlab.org/entry/4230022. This interlock is a bit scary because we didn't have a lot of other strong indications, and we had no problem running the HV. Unfortunately, we had to spend a couple hours recovering the chambers. https://logbooks.jlab.org/entry/4230340
Current Run Plan
- Moller measurement on day shift
- Continue run plan: https://hallcweb.jlab.org/wiki/index.php/Short_Term_Run-Plan
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)
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.
