Run Planning Meeting Notes, June 8 - June 15, 2022

Meeting are via ZoomGov: connect (Meeting ID: 160 199 0060 / Passcode 8394)

MCC whiteboard

Hall D counting room white board

Thursday June 9

1. Last 24h:
   • Ion Chamber calibration (had to be redone this morning as OPS found the one done yesterday suspicious).
   • Radiation levels checks done (levels, according to our CARMS, are very good).
   • Radiation levels scans with current (50nA, 75nA, 100nA)and RL (0, 1E-4, 3E-4) done. Need to be analyzed.
   • Microscope HV scan postponed to Monday. (Microscope can still be used.)
   • Most of the time was spend on tuning beam and doing harp scans (5C11, 5C11b, ours). Beam was not good, with bad convergence/divergence and showing significant background. May have been improved during the night (needs to be checked).
   • Act. Col. operational.
2. Reports
   • MCC does not see a double beam in Hall C at high CW beam current. But still sees it in other part of the machine. Currently, no more plan to stop the accelerator to fix this.
   • Our beam current lock is not working. Shift crew to watch for beam current drift.
   • Malte accessed the Hall to change FCal bases
   • First scan with new harp. Later scan. Large background. Bad convergence.
   • beam convergence (early afternoon), beam convergence (late afternoon)
   • Act. Co. gui needs to be updated.
   • Richard new harp fitting tool
   • Report on Act. Col.
3. Plans
   • Check photon beam quality (Hovanes, already started around 8am.)
   • Do L1(GlueX)/DAQ/detector checkout and take a bit of data?
   • Align diamond during the day? (Might not be the best time: Hall C is expecting to finish its access around 9:30. Then MCC will resume high current tune to Hall C).
   • Accelerator may be down for ~2h today to bring back a RF cavity. No firm plan yet.
   • Do ToF/CToF/CDC HV scans in the evening?

Wednesday June 8

1. Last 24h:
   • Ops is tuning the beam and asked Hall D to be ready by 11am-noon for physics beam. We restored shift starting at noon. But beam is coming only just now (7am-8am, Thursday 9th). Doing Ion Chamber calibration
     • Lost a few hours because of repair work done on a fan dropped a zone (miscommunication with Facility).
     • Struggled to tune Hall C and this put Hall D tune on backburner. Wasted 8-10h (whole night) trying to tune Hall C with two magnets off, which is not possible. DC power group is e-assessing their HCO procedure.
     • One of the quadrupole (MQP5C09) on Hall D line tripped on overtemperature. Probably due to clogged cooling line. Needed to investigate so brought down North Linac and ramped down our tagger magnet. This quad. is now off and will (tentatively) be repaired at next maintenance day. CASA devised a tune for us that does not use this quads.
   • Yesterday MCC safety minute: The PD saw a water mocassin eating a bullfrog in his pound => watch for snakes.
2. Reports
   • A. Somov replaced two boards during late afternoon (rapid access).
   • If you need access, put your name on Hall D white board (access list) and let RC know.
3. Issues
   • Maybe problem with 2-spot beam (two beams differing in energy by 10^-3). Not clear if this is present with CW beam. If it is, fixinf this may delay the program: fixing this is of the highest priority for Ops.
   • While walking to MCC yesterday (Wed. June 8th) afternoon, I passed a snake that was basking in the sidewalk gutter => watch for snakes.
4. Plans
   • Ops still have some work to do: Establish high current in Hall C. Start Hall B (tomorrow?).
   • Assess beam quality, optimize beam transmission, checkout/calibrate systems.