RC report for 5 April Swing through 6 April Day

Log entry time 16:39:30 on April 06, 2004

Entry number 81598

keyword=RC report for 5 April Swing through 6 April Day

Run Coordinator's Report for 5 April Swing to 6 April SwingSummary

Beam studies occupy most of swing shift. Fro 18:00 through 23:30 beam not delivered to Hall C. Injector tuning for 3 Hall operation, along
with accelerator interlock problems (related to Hall A?) responsible for down time. At end of swing shift, Reza gets reasonable injector tune
for 40 uA for Hall C, and 100 uA for Hall A. After beam returns, LH2 production running through owl and day shifts.

Significant News

New HV file loaded to include Octant 4, Detector 11 FR after gain matching (thanks, Julie).
IHWP still IN. After some discussion and feedback, we will attempt to begin a 3 day cycle for Moller running and IHWP state change. In addition, we will let PZT/IA feedback run continuously until feedback does not function properly (slopes change, voltages "rail", etc.). When this occurs, we will perform RIP scans to get feedback working again. Our first attempt at this will be Wednesday (see Plans below).
Lumi 7 still not working properly. Still not clear what the cause is, but some ideas should be floated around, and next Monday's maintainance day would be a good opportunity to implement them.
DMCH Interface box is the "new" box, and 120 Hz mode still does not work for French electronics. A new procedure for 120 Hz running will be to set acquisition mode to TS_Scaler rather than TS2_full.
The cause for cdaql3 locking up and needing rebooting has been traced to a missing bit on one of the hard disks. Steve Wood will look into this.

Plans

MCC will take beam from 17:00 until 22:00 for beam studies/injector setup.

After beam is back into the Hall, start taking LH2 production data. CHECK THAT IA/PZT FEEDBACK IS CONVERGING AND IS OPERATIONAL! If not, run a RIP scan to get new feedback parameters and get the feedback to work satisfactorily.

Continue with LH2 production running through Owl shift.

Moller measurements and IHWP removal tomorrow evening. Given the personnel on shifts for swing and owl (Sarah and Kaz, respectively), we will wait until around 20:00 to perform the Moller measurements and remove the IHWP. AFTER THE IHWP STATE CHANGE, A rhwp SCAN SHOULD BE PERFORMED TO ZERO OUT THE CHARGE ASYMMETRY IN THE HALL. If, after this change, feedback is not operational, Kaz will be on shift to make it work.

After Moller, continue with LH2 production running.

Concerns