RC meeting and Run Plan, Saturday Oct. 13

Status

Beam quality
- Bottom line: after BLM trip investigation, mostly great beam at 35uA, except for one 3h interruption around midnight
Progress
- Taking data at current kinematic point (theta_Shms=6.49), up to 12% of data collected
  - This number will be changed, as the standard.kinematics file was never changed for the new kinematics point
  - All runs from 5078 on need to be re-analyzed

Problems with hallc_replay:
- Shift crew noticed replay scripts were missing, as were all other files in hallc_replay
- I contacted Eric and Brad, and Brad found out it was caused by an erroneous "rm -r *" executed by someone
- Brad restored a backup from 11pm yesterday, and we re-saved the kaon_lt CSV file

standard.kinematics file not updated for current run
- In progress of re-analyzing all runs from 5078 onwards, will update collected statistics afterwards.

During beam-tuning received strange SHMS HGC-related HV alarm.
- Steve Wood told us this is related to a RadCon detector and should be masked in the alarm handler: not our problem

SHMS at small angle
- (Might) need new limits on diffusor ion chamber if we run above >=50uA (Jay Benesh confirmed might be the case), more info here.
  - Added during RC meeting and Run Plan, Thursday Oct. 11
  - Not an issue right now because we are rate-limited to 35uA,
  - Might become issue at the next momentum setting and/or the luminosity scan
SHMS at small angle (part 2):
- Be wary of DC trips!
  - Added during RC meeting and Run Plan, Friday Oct. 12
  - In current setting, DCs will trip at 50uA, something to look out for during the next momentum setting and/or the luminosity scan

HMS Dipole LN2 fill level very high (essentially full)
- Added during RC meeting and Run Plan, Thursday Oct. 11
- Not urgent, small ice ball forming in non-critical location (we're watching it)
- Cause: seems like JT-4 is stuck again
- Will coordinate with Andy Kenyon early next week for opportunistic escorted access
- Alarm disabled for now, re-enable when fixed. Instructions

RadCon wants to put a small detector in the SHMS hut during the next opportunity
- Needs few hours, communicate with Brad when next opportunity arrises
Hall D needs opportunistic 1shift of HallC down for beam studies, not pressing right now (needs to be done before end-of-run)
- Unlikely this will happen in the next week

Continue for 2 more shifts with Q2=3. W=3.14 x=0.25 theta_Shms=6.49
- Will update new statistics projection based on the correct standard.kinematics file once all runs finish re-processing
Next setting (end of OWL/begin of DAY): Q2=5.5 W=3.02 x=0.4 theta_Shms=6.49
Prepare for 1-2 shifts of luminosity scan early next week
- Proposed to Jay to do Monday and/or Tuesday SWING when we have experienced shift crew
- Ryan agreed to be present as third (worker) to deal with the many changes during this study