• Main INDEX
  • Monthly INDEX
  • PREV
  • NEXT
    Make New Entry, Make Followup Entry

    User name pking

    Log entry time 00:01:13 on May 21, 2009

    Entry number 275168

    keyword=Swing shift summary

    Shift begins with production runs (2508) in L-HRS and the R-HRS DAQ down due to some et_start process which wouldn't be cleaned up normally.

    HAPPEX run 31390 is in progress, started at 15:17.

    Compton run 16987 is in progress, started at 15:33.

    16:08---Cleared the bad et_start process; now the R-HRS can be started. Resume production running.

    	2509	21413
    	2510	21414
    	2511	21415
    

    17:42---Started new Compton run. Continue production running.

    	2512	21416
    

    18:01---Target expert is making a minor adjustment during runs (2512, 21416). "It shouldn't mess with production...much."

    Continue production running.

    	2513	21417
    

    18:39---Target experts are chaging the field direction between runs (2513, 21417) and (2514, 21418).

    The spin has been rotated 180 degrees: field direction is transverse plus; pumping direction is antiparallel; 43%.

    18:52---Continue production running.

    	2514	21418
    	2515	21419
    

    19:39---Started new HAPPEX run, 31391. The previous run had 462337 events.

    We notice BLumi5 is saturating.

    19:44---Started new Compton run, 16989. The previous run had 921051 events.

    19:47---Continue production running.

    	2516	21420
    	2517	21421
    	2518	21422
    

    21:16---Start a threshold scan of BB MWDC.

    Runs (2519, 21423) have thresholds of 5.25V, (2520, 21424) have 5.0V, (2521, 21425) have 4.75V, (2522, 21426) have 4.25V, (2523, 21427) have 4.0V.

    21:44---Reset the BB MWDC thresholds to (5.5V).

    Continue production running.

    	2524	21428
    

    21:49---Started a new Compotn run, 16990. Note that the Compton cavity isn't locking very consistently.

    22:12---Continue production running.

    	2525	21429
    

    22:37---OPS lost communication with iochla, and couldn't send beam.

    23:09---Communication with iochla has not been restored yet. Stop runs (2525, 21429).

    Shift ends with no beam due to the problems communicating with iochla.