Run Meeting: Feb 27th, 2019

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3:30PM Run Meeting, Counting house meeting room (200C)

RC: Cameron Clarke

Status

Experiment Status: Yesterday Day until now

• We used the RF recovery time well to look more carefully at the DAQ, and found that the remaining issue with the DAQ was not double pulsing in triggers, but maybe the LHRS clock has just a bad connection on it, and has been bypassed for another clock now: https://logbooks.jlab.org/entry/3660015, https://logbooks.jlab.org/entry/3660042, https://logbooks.jlab.org/entry/3660075
• We Took SciFi cosmics some more during the down
• Added trigger signals to remote scope: https://logbooks.jlab.org/entry/3660022
• Took new BPM pedestals: https://logbooks.jlab.org/entry/3660024
• Investigated the questionable level translator, found noticeable cross talk: https://logbooks.jlab.org/entry/3660044
• We came back and took production data, though the beam was not very stable:
• Helium cryo levels were messed up by improperly set PID loop: https://logbooks.jlab.org/entry/3660108
• The timing shifted again, which is likely due to old gate delays: https://logbooks.jlab.org/entry/3660198
• We ran out of ROOT file storage space over night, which is a good problem to have: https://logbooks.jlab.org/entry/3660483
  • John has corrected the problem, no data lost
• Bob corrected the DataMon Deadtime Calculator to reflect reality better: https://logbooks.jlab.org/entry/3660689

Hall Status:

• Magnet coolant issues resolved, no clear problems
• Receiving beam at 50uA

Plan:

• Continue production data on Tungsten 2.8% target at 50uA, and move higher if possible
• In the future we should avoid short notice activities in the hall outside of normal business hours, as short notice increases chances of inadequate preparation and likelihood of problems requiring hall access or calling in experts consequently increases, and the present high quality and high quantity 50 uA running is precious

RC

Jason Bane is the RC (email cameronc@jlab.org, RC phone: 7578761787) All shifts are on-call and should expect to receive full beam for production on tungsten foils, with occasional sci-fi runs pending.

Slides/Links

MCC scheduling Whiteboard: http://accboard.acc.jlab.org/

APEX wiki page: https://hallaweb.jlab.org/wiki/index.php/APEX

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