Run Coordinator's report for 2 April Swing through 3 April Day

keyword=Run Coordinator's report for 2 April Swing through 3 April Day

Run Coordinator's Report for 1 April Swing to 2 April Swing

Summary

For the most part, very smooth LH2 production running. Finished Wells plot scan. Lost a base in Octant 4-Detector 11, FR.

Finished Wells plot scan using the RHWP to induce larger AQ's in the Hall. Due to the larger AQ's generated, it takes a much shorter time to accumulate data with comparable relative errors to the data taken using the IA to induce AQ's in the hall. Should the analysis team decide that more Wells plot data is needed, this seems to be the way to go. Good thinking, Jianglai and Kaz!
Very smooth LH2 production data over night and through the day.
Glitch at the end of Day shift - it appears that the base in Detector 11 from Octant 4 (front right) has died (the HV is OK, but the raw signal coming from the Hall reads -3.3 V and constant). At the next access (which will happen for sure Monday evening at 18:00), we need to replace this. Julie says there are spares upstairs, so this should be a pretty quick repair. In the mean time, for the data taken between runs 21124 and the last run to be taken with this problem, we can eliminate this detector's buddy (Detector 11, Octant 8) to preserve as much symmetry as possible, and to avoid compliactions in dead time corrections.

LH2 production running over the entire weekend.
120 Hz runs once/day during day shift.
Moller runs and reinsertion of the IHWP on Sunday when Dave Gaskell comes in (any time is fine).

Spikes in French electronics
Non-statistical widths in detectors 13 and 14 of octants 4 and 8.
Non-understood influence of Interface Box to DMCH's. Spare does not work in 120 Hz mode.
NA LTD errors still occurring at a smaller rate. Brian has generated a "HowTo" document (located on the G0 web page under http://g0web.jlab.org/manual/Electronics_manuals.html) for trouble shooting.
Crosstalk with target IOC and target FSD box when the Musson box is rebooted remotely
Changed behavior of BPM 3H00C Y position with respect to other hall BPMs.
Discrepancy in beam current measured by BCM1/2 and the MPS BCM (This should be cured after the BCM calibrataion. Data have been taken, but analysis awaits.).
Dead base in Octant 4, Detector 11, FR.