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User name A. Puckett
Log entry time 00:02:14 on May23,2009
Entry number 275631
keyword=swing shift summary
Production data taking from beginning of shift until Yi and Jin arrived to work on target laser alignment. After they finished their work, the first NMR measurement showed only 17% polarization. That was at about 22:40, and the target experts say that this number is not reliable, and they strongly recommended that we keep the 3He target out of the beam while "spinning up". So now we are waiting until 2:40 to do another NMR measurement and find out if the polarization is reasonable to return to production data taking, and we are also waiting for instructions on what to do in the meantime. For now we are taking 2 uA beam on the optics target and taking data. No HAPPEX run going right now. Instructed the shift crew to start the HAPPEX DAQ before returning to production.
Production run list:
Run #L/R, start time, stop time, Nevents L/R, comments:
2596/21499, 16:04, 16:31, 4.27M/4M
2597/21500, 16:32, 16:59, 4.28M/4M
2598/21501, 17:00, 17:30, 4.28M/4M
2599/21502, 17:31, 17:58, 4.27M/4M
2600/21503, 18:16, 18:24, 1.37M/1.29M