RC Meeting Information

RC Daily Meetings are at 3:15pm, remote connection link: https://bluejeans.com/256205934

Current RC: Brad Sawatzky

Accelerator and Hall Status

Hall A remains in Controlled Access, but is ready for beam (see 4th pass separator comments below).
GEM and Grinch experts have made a few short accesses for opportunistic debugging while we're down.

4th pass separator has prevented beam to Hall A since Wed afternoon.
- RF Separator work was unsuccessful as of 3pm Friday. PD Update: 4th Pass IOT
- Work on the 4th pass IOT has continued over the weekend. However, latest word is that no solution will be available until at least late-day shift on Monday (and that is still a little unclear). So, stay tuned...
- There will be an interruption to all Halls when OPS is ready to try bringing the 4th pass separator back online.

Hall A will move to Restricted Access at ~6am Monday morning for the configuration change to SBS-11 (no Survey required)
- We will need to ensure that HVs are off and that it is safe for Techs to work on BB and SBS.
- The change-over will happen over Monday and Tuesday and will require considerable work around the detector stacks and pivot
- Hall A Technical staff has priority in that area
- RadCon, Survey & Alignment are contacted and ready to go
- We plan to complete the work by the end of Day shift on Tuesday.
Depending on how stable the beam is to Hall C over the weekend, we are hoping to shift the pass change to Tuesday Swing (instead of Wed Day).
- Final decision on this will be made on Monday
- Shift Leaders have been notified that their shifts are cancelled through Tuesday OWL shift.
- Tuesday DAY shift personnel should come in as planned. The Tuesday DAY shift leader is free to arrive at noon if he would prefer.

Additional details in sub-section notes below.

Take BBCal data with magnets on to get HV settings established
Beam restoration to the Hall
- Start with Sieve IN or OUT?
- Ensure target is OUT
- GEM HVs OFF
- SBS, BB OFF
- All other systems should be ready to go
After initial steer-up into Hall is complete
- Verify beam profile with Harp scans
- Ramp BB and SBS to production currents
- Determine raster size and position on target
Low current GEM runs (?)
- 1 uA on LH2
- Take ____ 5 min long runs with different GEM HV settings for quick voltage scan (needs details)
- Take 1 30 min long run with the all GEMs at standard voltages to support track reconstruction checkout
Move to Production Running cycle
- [UPDATE ME]

Upcoming shift schedule issues https://misportal.jlab.org/mis/physics/shiftSchedule/?experimentRunId=GMn-2021
- Several open TO positions starting Nov 24
- John Arrington's Tuesday Swing shift is marked 'Trade Requested', but he's been confirmed.
- Shift Leaders have been notified that their shifts are cancelled through Tuesday OWL shift (during config change)
- Tuesday DAY shift personnel should come in as planned. The Tuesday DAY shift leader is free to arrive at noon if he would prefer.

Role sharing between SL and TO was discussed
- TO should support the SL wherever possible while still keeping primary focus on the target
  - Beam Time accounting; Shift Checklist tasks are low-hanging fruit
  - Suggestion is to have TO start/stop runs and maintain the Run Log spreadsheet?

Run plan communication / documentation will be 'officially' documented on the Daily_Meetings#RC_Meetings page
- Don has made the Run Coordinator 'Run Plan / Report' page more visible on the wiki (and nicely formatted it)

HCal:
- HCAL timing plots are being updated/corrected
- Will turn off HVs this evening
- Working on clustering

Timing hodoscope:
- working on RF alignment
- HV instructions for hodoscope are in the wiki (and also re-posted to halog)

Grinch:
- Study of LED data taken under different BB+SBS conditions underway
- Maria/Todd/Bradley will be taking some more opportunistic LED pulser data through the weekend

Replay analysis:
- GEM work is ongoing
- Eric working on end-of-run report file output along with Dave F.