RC meeting and Run Plan, Tuesday Nov 20
From HallCWiki
Contents
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 15 (Q2 = 4.77, x = 0.6, pi+)
- RC Daily Update Tuesday, November 20
Current Run Plan
- Order of Kinematic Groups
Notices in Effect for Shift Crew
- If the HV trips for SHMS S1Y5B contact Simona M. DO NOT change the HV from the nominal value!
- Shift leaders, please fill out the check list once per shift!
- It is no longer required to fill out the standard.kinematics file online, it is now done automagically
- 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.
- HMS/SHMS TOF resolutions using hodoscope beta -Mark J.
- RF time and coincidence time -Mark J.
- Yet more jitter tests -- found small issue w/ ref time, but nothing that impacts coin. times -Brad S.
Planned Accesses to the Hall
- Monday, Nov 26: aerogel change and HGC work needs to be coordinated with Walter K., we must be in restricted access for this work
Planned Accelerator Configuration Changes
- Sunday, Nov 25(?): 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
- Harp scan at 3H07A and 3H07B with raster off to address possible issues with harp (https://logbooks.jlab.org/entry/3624463)
