------------------------------------------------------------ Date: Sun Sep 9 07:52:20 2001, Shift: 00:00-08:00 Supervisor: sjs, with: none Log book#8 pages 97 - 98 Shift Summary: ------------------------------------------------------------ 1.) About one hour (00:15-1:20) of useful beam at beginning of shift,then store lost with "an Aux Power Supply needs to be replaced...". At 05:10 beam restored for about 5 minutes, when a "Pass dropped" occurred. At end of shift "Pass personnel are in...no estimate for beam" 2.) Used limited beam to adjust vertex position (done during run 4645). MCR made four 0.1mm shifts in "+direction blue horizontal plane". Starting with <BBz>=22.7 cm, the <BBz> after the sequential shifts were 17.3 cm, 9.2 cm, 5.8 cm, -2.0 cm, respectively. The adjustment went smoothly and only took about 20 minutes. Started run 4646 with relocated intersection, but beam lost after about 30 minutes of running. No additional useful running during shift. 3.) The pedestal for tile2_6 seems to be drifting substantially, even during the short pedestal calibration run. This was also seen last night and suggests a problem with this detector. ------------------------------------------------------------
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