RC report for 3 April Swing through 4 April Day

Log entry time 16:36:20 on April 04, 2004

Entry number 81437

keyword=RC report for 3 April Swing through 4 April Day

Run Coordinator's Report for 3 April Swing to 4 April Swing

Summary

Smooth LH2 production running over night and through the morning. Moller measurements and insertion of IHWP during Day shift. Magnet fast dump occurs at around 14:00. Now in recovery mode.

Significant News

LH2 production running over night.
Moller measurements (P ~ 74.5%)
IHWP now IN.
Magnet fast dump at 14:00. Both the PLD module and the JT valve controller failed. Not clear which one took the other one out, but nonetheless, this caused a SMS fast dump.
Took opportunity in the Hall to replace the base in Octant 4, Detector 11, FR.
Jainglai also took the opportunity to work on Lumi 7, which was showing "flat" asymmetries.

Plans

LH2 production running until Monday 9:00 when MCC takes beam for beam studies.

120 Hz runs once/day during day shift.

Concerns

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.).