RC Meeting, Wednesday, Dec 8, 2021

RC Meeting Information

   Have RC meeting today

RC Daily Meetings are at 10 AM, remote

• Bluejeans remote connection information:

 To join the Meeting:
 https://bluejeans.com/861439920
 To join via Room System:
 Video Conferencing System: bjn.vc -or-199.48.152.152
 Meeting ID : 861439920
 To join via phone :
 1)  Dial:
   +1.408.740.7256 (US (San Jose))
   +1.888.240.2560 (US Toll Free))
   +1.408.317.9253 (US (Primary, San Jose))
   (see all numbers - http://bluejeans.com/numbers)
 2)  Enter Conference ID : 861439920

Useful Links

• Fall 2021 Shift Schedule
• PionLT Physics Status
• PionLT Runplans
• Hall-C Controls
• Hall-C Logbook
• MCC White Board

Current Status

• Latest Update on the current status for this setting RUn this setting until Saturday morning.
• Summary of data and plans forward
• Running production on LD2 Q2=3.85, W=3.07, x=0.31, low epsilon, HMS angle=35.12 deg, HMS momentum = -1.332 GeV/c, SHMS angle= 6.39deg, SHMS momentum=-6.538 GeV/c;
• 6uA was the best current for running at this angle.
• BCM calibration was done but limited to 43uA becuase of diffuser limits
• Yesterday's Day , Swing and Owl shift went smoothly. Current number of pions roughly 2900.
• Photo cathode forecast

Current Run Plan

• Day :
  • LD2 Q2=3.85, W=3.07, x=0.31, low epsilon, HMS angle=35.12 deg, HMS momentum = -1.332 GeV/c, SHMS angle= 6.39deg, SHMS momentum=-6.538 GeV/c;
  • Need daily one hour trigger 3/4 runs.
• Swing
  • LD2 Q2=3.85, W=3.07, x=0.31, low epsilon, HMS angle=35.12 deg, HMS momentum = -1.332 GeV/c, SHMS angle= 6.39deg, SHMS momentum=-6.538 GeV/c;
• Owl
  • LD2 Q2=3.85, W=3.07, x=0.31, low epsilon, HMS angle=35.12 deg, HMS momentum = -1.332 GeV/c, SHMS angle= 6.39deg, SHMS momentum=-6.538 GeV/c;
• FADCmode 10 run 13695 taken on Saturday.
• Take the 2.5 hours Al dummy at end of running on Saturday morning.

Notices in Effect for Shift Crew

• The Raster Coil pair Ax and Ay are off. Raster needs to be at 4x4.
• With LHe alarms it is good to check the cameras for plumes. If no plume and it is below the LO alarm and above LOLO then monitor with a plot and halog the problem.
• With LNitrogen alarms are not that critical. Just need to start monitoring the problem with plot and halog.

Current Issues

• The Raster Coil pair Ax and Ay are off
• Elevator is not working
• Noticed bug in Prescale GUI
• Diffuser limit at 46uA
• Instruction for raising the limit:

Crew Chiefs, We have permission to raise the Hall C diffuser raster limit to allow running >46uA to Hall C. This limit is normally imposed when one of the two rasters is not operative. Since the hall was able to double the running raster current to get the same size raster on the target as having both rasters, Keith is allowing us to raise the limit. To get to the setting, open the Hall C diffuser interlocks screen. Go to the bottom right corner and open the Expert screen. Just below and to the right of the FSD bits, raise the "Raster 1 OK Limit" to slightly above the highest current the hall wants to run at. Do not change the Raster 2 limit. Make a log entry with screen shots. Make an ABIL entry, System MPS and an expected removal date of 3 Jan. 2022. Paul

Planned Accesses to the Hall

• none

Planned Accelerator Configuration Changes

• none

Special Requests

• none