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    User name E.Chudakov

    Log entry time 00:03:50 on May 5,2004

    Entry number 120649

    keyword=Swing shift summary

    Shift crew: E.Chudakov, A.Shahinyan, B.Craver
    Running on "Be thick" target (due to the target GUI mark)
    17:24-17:30 RICH HV tripped
    19:05-19:19 MCC stopped the beam in order to correct the orbit
    20:03-20:09 RICH HV tripped
    21:15-21:30 Beam current 20-80uA, trips
    21:30 - RICH produces a spike at 15hits/cluster. Bodo came
    and suggested to take a new pedestal run. A GASIPLEX chip
    became noisy.
    21:57-22:03 - Beam off. RICH pedestal run
    22:19 - reboot ROC12 and ROC16
    22:20 - the new RICH pedestals are used. The RICH noise disappeared.
    22:20 - In order to reduce the trips MCC reduced the beam to 98uA
    22:40 - MCC increased the current to 107uA. Above that the beam trips.
    23:22-23:25 - RICH HV tripped

    Run Table



    
 run   from  to      #events    comments
    
3195   15:48-16:13     1M
    
3196   16:14:16:39     1M
    
3197   16:40-17:03     1M
    
3198   17:04-17:25     0.986M   RICH tripped at the very end of this run (about 2min)
    
3199   17:31-17:55     1M
    
3200   17:56-18:18     1M
    
3201   18:18-18:43     1M
    
3202   18:44-19:11     0.87M
    
3203   19:20-19:43     1M
    
3204   19:44-20:04     0.836M - RICH tripped at the very end (1min)
    
3205   20:10-20:33     1M
    
3206   20:34-20:57     1M
    
3207   20:58-21:24     0.84M
    
3208   21:30-21:55     1M
    
3209   21:58-22:03     5k        RICH pedestal run (no beam)
    
3210   22:09-22:10     50k       RICH test
    
3212   22:18-22:45     1M
    
3213   22:49-23:10     1M
    
3214   23:11-23:22     0.3M      RICH tripped, the run stopped
    
3215   23:25-23:47     1M
    
3216   23:52-


    Summary


    About 17M events taken. No big problem occured.