My stint as run coordinator got off to a roaring start with no beam in the hall for essentially 12 hours. One comment I would like to make is that we are starting to run low on run plan ideas that do not require parity quality beam. If you have any suggestions on things that we need to investigate without parity quality beam then please let me know.
Began with recovery from beam studies during day shift. Julie and Jeff then used the superharps and bpms to center the beam on nominal hall beamline (g0log 70558). After that Lars performed target centering scans for all four targets: LH2, small hole, large hole, and radiator (g0log 70567 and 70568). There was some difficulty associated with this program due to our use of low current beam and Hall B bleedthrough however we did prevail (70564).
Sarah tried to perform her Halo Target Centering test plan but ran into problems with the MCC that caused that program to be aborted after a couple of hours. Essentially, MCC was unable to come up with the documentation for the test plan and when they did locate it there were problems with an undocumented GUI for controlling the halo target. The current PD is looking into this to make sure we do not have this problem again. The final iteration of the gain calibration occurred next after Serge corrected a problem with a Caen supply that was tripping certain French channels (70570 and 70625). Another round of RHWP/IA/PZT scans ensued. New slopes were put into the feedback system and a long time encoding run taken.
Shift began with G0 beam health checkup and two hours of beam studies (completing test plans not done on Wednesday). The IOC that reads the G0 BPMS crashed and needed to be rebooted (iocse20). During the latter portion of beam studies we went into controlled access and completed a variety of tasks too numerous to list (70671). One was the adjustment of a couple of ion chamber trip points to allow us to take Moller beam without masking everything (70661). There was also work done on the Musson box. Around 13:00 we found out that there had been a CHL crash at 11:30 (70658). We wound up staying in controlled access for the rest of the shift. The flyswatter was put in prior to closing the hall to support the program on swing shift (70668).
More RHWP/IA/PZT scans and long stability runs.
Not sure yet. Open to suggestions.
Moller SystematicsSaturday Swing
CFD Threshold Study (part of Q2 and Centering Program)
More RHWP/IA/PZT scans and long stability runs.