RC meeting and Run Plan, Wednesday Nov 14

RC Meeting Information

RC Daily Meetings are at 4:30 PM, 2nd floor Counting House Meeting Room

• 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

• Detailed Kinematic Group Settings
• KaonLT-SIDIS Group 2018-2019 Shift Schedule
• Hall-C Controls
• Hall-C Logbook
• MCC White Board

Current Status

• Taking kinematic group 10 (Q2 = 4.75, x = 0.45, pi+)
• RC Daily Update

Current Run Plan

• Order of Kinematic Groups
  • Group 6 (Q2 = 4, x = 0.45, pi+)
  • Group 10 (Q2 = 4.75, x = 0.45, pi+)
  • Group 9 (Q2 = 4.75, x = 0.45, pi-)
  • Group 13 (Q2 = 4.76, x = 0.55, pi-)
  • Group 14 (Q2 = 4.76, x = 0.55, pi+)

Notices in Effect for Shift Crew

• Shift leaders, please fill out check list once per shift!
• Split the large desired charge between multiple runs (~1 hour per run)
• Listed currents are estimates. For runs at less than 60uA, increase current until SHMS singles rates are between 400k-500k.
• How-to power cycle PLC I/O chassis: https://logbooks.jlab.org/entry/3625862, https://logbooks.jlab.org/entry/3625900

Current Issues

• Worsening of coincidence time resolution
  • Cause of coin. time jitter (resolution loss) may have been found? -Brad S.
  • Coincidence time after insertion of passive delay -Dave G.
  • Follow-up Re: Coincidence time after insertion of passive delay -Dave G. with comment from Dave M.
  • More jitter tests -- nothing found on scope... -Brad S.

Planned Accesses to the Hall

• None

Planned Accelerator Configuration Changes

• Monday, Nov 19: system recovery and spot move, estimated 4 hr downtime although it is scheduled for 8.
• Tuesday, Nov 20: CHL UPS battery change, should be noninvasive however, induced CHL anomaly is possible.
• Wednesday, Nov 21: Hall A goes offline and MCC wants to conduct high current beam study of energy spread at 40 uA. It is unclear that we will be effected.
• Monday, Nov 26: Energy change to 1.86 GeV/pass, we will be moved over to 500 MHz laser.

Special Requests

• Carlos Munoz Camacho would like access to the hall to show Hall-C to two French engineers working on the NPS project. It should be a ~30 minute access, and is a low priority. He can be contacted at 357-1065