From: Apache (apache@pii3.brahms.bnl.gov)
Date: Mon Jan 13 2003 - 08:48:50 EST
------------------------------------------------------------ Date: Mon Jan 13 08:48:50 2003, Shift: 00:00-08:00 Supervisor: JIJ, with: Log book#13 pages 56 - 57 Shift Summary: ------------------------------------------------------------ 1. The machine had low luminosity for deutrons. Most of the time while beam the blue luminosity was below 18e11. At times the background was low, down below 20k/s in the H1 and H2 scalers. There were, however, sudden changes in the background when MCR was steering, sending the H1 and H2 scalers up to 150 and 200k/s. In summary, overall better background level but not stable. 2. Run 7350 - 117k trigger 6 Run 7351 - 39k trigger 6 (aborted by IOserver error, incomplete in database) Run 7352 - 0.1k trigger 6 At this point we are at 167k trigger 6 with FS @ 1/4 A-pol and MRS @ 3kG A-pol. Run 7353 - pedestal run Run 7354 - TPC pedestal run Run 7355 - DVM run 3. During a significant increase in background the DAQ reported IO Server error. Also cathode 3 on T5 tripped, but came up again without a problem. Top channels 1, 3, 5 and 7 on H2 have been geetting higher and higher actual voltage the past shifts, while the demand voltage has been kept constant at -1600V. Passing -1800V I turned demand voltage down to -1400V, which put actual voltage around -1600V. Also, the H2 problem reported during the Saturday night shift has returned for unknown reason. This is a problem that shows up in the time average distribution. ------------------------------------------------------------
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