Run Coordinator report: summer 2022 w3

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This was a trying week for the accelerator, with 9h of downtime due to thunderstorms, and many more hours of downtime while the accelerator team tried to fix persistent problems in getting Hall C to the current that they need. We received beam for 60h and did pretty well with that time - we lost only 3h to DAQ issues, 1h to attend to a power supply problem for BCAL and another 3h to planned configuration changes (moving radiators or the target).

Tasks completed in the week include the TAC run, refining the CPP trigger configuration, creating a straight track trigger configuration, changing FCAL bases, completing the microscope HV scan, and replacing the faulty transducer in the DIRC. MCC power cycled the harp 5C11 which enabled us to take useful harp scans once again. We still have a problem with the beam convergence and this morning the accelerator was unable to run with our amorphous radiator in place, it caused trips.

The event rate dropped by about 50% in the forward detectors for a short period of time after the TAC run. On Monday evening we took a short series of runs with the target removed and re-inserted to investigate this, and after the target retraction the rates returned to their original value. The cause of the drop in rates is not yet understood.

The detailed day to day notes are at https://halldweb.jlab.org/wiki/index.php/Run_Planning_Meeting_Notes,_June_23_-_June_29,_2022