------------------------------------------------------------ Date: Wed Oct 17 00:11:47 2001, Shift: 16:00-24:00 Supervisor: KH, with: JC Log book#10 pages 18 - 23 Shift Summary: ------------------------------------------------------------ Had a store from 16:00 through 20:15 when PHENIX and us voted to end store. There was so much DC beam in the machine that the dump caused a Quench Link Interlock; So Dana said they said. Total beam time this shift: 4 hours Runs achieved: run trig 1 events 5378 118727 5379 92576 5380 86620 5381 86803 5382 84626 5383 125786 5387 in progress (started at 23:40) This brings a total of about 1.65M trig 1 events for the current part of the run plan. ie MRS 45 with D5 at 4B and FFS/BFS at 4/4 with magnets at 1/5 B. Plan is to change to MRS 30deg with magnets at 4B and FFS/BFS at 4/4 to 1/5A. Runs 5379 through 5382 were short due to scanning ZDC CFD delay cable lengths to optomize. The original length of 8ns cable was found to provide the best results. We noticed in run 5383 that the vertex was very wide. In addition there was an appreciable drop in ZDC count rate. At the same time there was a significant increase in the count rate of H2. MCR called and said they would put some colliminators in and sometime after that H2 got a lot quieter ie 13kHz to 8kHz. I think this was the "DC" beam in the machine that they were talking about. The anode voltage for all anodes on T5 was increased by 20V during run 5383 in an effort to boost efficiency. ------------------------------------------------------------
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