------------------------------------------------------------ Date: Sun Aug 19 16:01:20 2001, Shift: 08:00-16:00 Supervisor: J.I.Jordre, with: T.Lussand Log book#7 pages 132 - 136 Shift Summary: ------------------------------------------------------------ 1. 2 quench link interlocks. One store with ~100 events/s reported from DAQ control and ~280 coincidences/s in ZDCs. Long recovery after QLI at 13:39 still in process. 2. Run 4287: 164.2k trigger 1 events Run 4290: 38.5k trigger 1 events Run 4291: 96.3k trigger 1 events (Now at ~396k trigger 1 events at current setting, i.e. A polarities) 3. At the high peak rates (point 1) T5 anode 1 had 112uA current at 1665V (run 4290). Anode voltages in T5 were lowered to default values, e.g. anode1 @ 1625V, giving I~85uA. At QLI ending run 4291 the following channels tripped: anodes 1 & 3 in T3 anodes 1 & 2 in T4 all anodes and cathodes in T5 Residuals in T1 seem to indicate space charge build up at the highest rates. Residual distro is wider and more "non-gaussian" in T1 than the other TPCs. ------------------------------------------------------------
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