Run Coordinator summary: October 14, Swing shift to 15, Day shift

keyword=Run Coordinator summary: October 14, Swing shift to 15, Day shift

RC report (Oct. 14 Swing shift ~ Oct. 15 Day shift)

Wednesday, Oct. 14, (Swing)

16:56 Beam back after injector bunchlength and harp scan measurements.
17:00 Resume production at 100 uA.
Two online analysis crashes during swing shift at 18:40 and 20:25.
Since beam is back, the lumi asymmetries are about 1500 ppm probably due to fluctuations in coolant supply temperature.
20:25 Reduce current to 95 uA, lumi widths improve to 1200 ppm.
23:25 Begin 15 uA running for Compton electron detector and coincidence tests.

Thursday, Oct. 15, (Owl and Day)

00:00 Production running at 100 uA.
03:00 Reduced current to 96 uA since lumi widths were around 1700 ppm.
02:35 Compton rates flat-lined due to DAQ problem.
03:42 Beam IHWP inserted and began slug 24.
04;30 Trim rack bulk PS tripped off.
05:45 MCC informs shift leader that Moller dipole was left on after the last Moller on Tuesday.
Moller dipole was turned off from shift leader's request.
Detector linearity tests while beam is off.
08:00 MCC ready to send beam back to Hall A.
08:00-8:25 MCC fixing beam positions.
08:27 Resume 100 uA production. Lumi widths around 1400 ppm.
08:30-09:30 Compton rates flatlined. Laser off. Mark Dalton reboots EPICS and has to move the GSO crystal back into its normal position.
08:40 Current reduced to 96 uA.
10:32 MCC starts injector work. Beam off.
10:57 Controlled access for Dave Meekins to investigate Cryo-target cooling.
During controlled access Jack noticed that the left Q1 displayed an "Invalid command" error.
Both right and left Q1's were ramped down and power cycled.
13:10 Controlled access completed and going back to beam permit.
13:30 MCC sending 100 uA into Hall A, but Compton HV tripping off.
14:53 Injector network switch dies and takes several injector IOCs down.
Injector RF phases got hosed and injector work starts all over again.
Day shift ends with no beam and injector work in progress.

Please always check online hists and compare them to the reference ones.
If you find something strange or wrong, please HALOG it so that the expert can check it.
Target Operator, please always check target PID system and strip plots to make sure all the systems work.
- The cryo flow rate around 25.2g/s and JT value is around 55.5 since this is better for Lumi widths.
- The flow rate and JT value setting are sensitive to the outside temperature. Hence the settings may change from morning to evening.
- Please be patient when you adjust the JT value since it may take a few minutes to make the cryo flow rate stable.