------------------------------------------------------------ Date: Tue Aug 15 08:12:34 2000, Shift: 00:00-08:00 Supervisor: RW, with: CE Log book#4 pages 92 - 94 Shift Summary: ------------------------------------------------------------ 1.Beam was cogged at 23:00 and last until 8:00am. The intensity was 4.3e9 (Blue) and 3.0E9 in the beginning and 3.0e( and 2.4E9 at 8:00am. The event rate of the trigger 1 was roughly 10 events/sec in the beginning abd 2 events/sec at 8:00am. This indicates that the emittance of the beam decreases much faster than the intensity decreases. It may not be a good idea to use the same beam for such a long time, if they can reaccecelarate the beam in 3-4 hours, though the operator may not be pleased. 2. Dana changed the HV of TOFW in the day time from -1500V to -1600V. Run 2254 (MRS at 90deg. with 4KGauss) has completed with 25953 colisions. Run 2256 has compleyed with 27448 collisions. Run 2258 has completed at 8:00am 3. During the run2254, DAQ stopped because fb1-evb Error occurs. To restart the run, click Clear Error and Begin run. The previous run is automatically ended by the Error status. If a new run doesn't start, try again. The Error status are not cleared by Clear Error, but don't worry about it. BBL HV was found off for about 10 channels. We reset the voltages, but thet tripped off again. We left them with no HV. ------------------------------------------------------------
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