Run Coordinator's Report for Sunday November 22 Day to November 23 Owl

Summary

The polarity of the spectrometers was changed to positive and run in this configuration overnight. This was to take e+ data to quantify the dilution to the e- data from e+e- pair production. The RHRS Q3 magnet polarity couldn't be changed so it was run with zero current which changes the optics of the spectrometer and reduces the rate. The interpretation of this data will thus require work on a dedicated optics mode with Q3 off. Dead time studies were also done overnight.

Most of the Day shift will be in access. There is work on the Compton ion chamber with trips sometimes with even beam present. There will be work done in the North Linac and the cathode spot will be moved.

Three shifts need a shift leader: Shift Leader on the day shift of Wednesday, November 25, 2009 and Shift Leader for the Owl and Day shifts of Friday, November 27, 2009. Please sign up!
Shift Leaders: please write a detailed shift summary (including runs taken and any activities) and submit the BTA for each shift. Please log CODA reboots in the halog and shift summary.
3rd person: Please make sure to start and stop the HRS DAQ at the same time as the parity DAQ and to do the prompt analysis and the HRS analyzer for every run.
3rd person: please keep a careful eye on the online data display. Most problems can be caught quickly this way.
Please make sure that the shift checklist is done once each shift.

Figure 1