October 21, 2022

RC Meeting Information

RC Daily Meetings are at 11:00 (am) via Zoom and in person in the counting house meeting room (2nd floor)

• Zoom remote connection information:

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Useful Links

• Shift Signup (Read only)
  • Shift Signup

• Hall-C Controls
• Hall-C Logbook
• MCC White Board

Current Status

• SHMS: 8 degrees, -9.2 GeV, 1x, 2x 1-7 off
• HMS: 20 degrees, -5.878 GeV
• 5pass beam, 40 to 60uA
• beam ramp rate 1uA/sec https://logbooks.jlab.org/entry/406490

Run Plan

• Continue data taking at setting 2. No special plan.

Special Task

• BCM calibration: https://logbooks.jlab.org/entry/4064522

Issues

• HMS Dipole and Q3 trip https://logbooks.jlab.org/entry/4064249

• SHMS HB vacuum https://logbooks.jlab.org/entry/4064884 and SHMS dipole LN2 level https://logbooks.jlab.org/entry/4064490. https://logbooks.jlab.org/entry/4064528 are red on magnet GUI. Those are know issues and monitored by Heidi. The latter could be addressed during next hall access.

• UNSER temperature has been mostly stable with the new controller but occasionally fluctuated https://logbooks.jlab.org/entry/4064634

• unfilled shift slots over the weekend.

Notes

• Brad switched the gas shed heat pump to "warm" https://logbooks.jlab.org/entry/4064368

• Two alarms are added to monitor SHMS Q2 vacuum while the vacuum gauge will be installed in the next maintenance day (thanks to Steve and Casey). https://logbooks.jlab.org/entry/4064546 https://logbooks.jlab.org/entry/4064936

• SHMS aerogel HV off and 50ohm termination was removed from the interlock https://logbooks.jlab.org/entry/4064052

• SHMS hood PMT 11 : https://logbooks.jlab.org/entry/4064301

To do

• UNSER calibration
• Install Q1 SHMS vacuum gauge (~3hr)
• calibrate SHMS Dipole LN2 valve during next access https://logbooks.jlab.org/entry/4064490. For now, monitor the ice accumulation if any https://logbooks.jlab.org/entry/4064528