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    User name P. Monaghan

    Log entry time 08:41:22 on January 9,2005

    Entry number 138664

    Followups:

    keyword=Owl Shift Summary

    Owl Shift Summary

    SL: Peter Monaghan
    TO: Aidan Kelleher
    3rd: Eli Piasetsky

    00:00 Shift begins with the momentum scan for BigBite just starting; run 1559 in progress for kinematic A1*; running at 3.5uA beam current and the tilted carbon target in place.

    00:10 Move to LH2 target.

    01:15 Moved to the tilted carbon target but lost 15 minutes because when we tried to change targets, MCC told us that it (tilted carbon target) was not on their list of target operational restrictions and so we could not use it; Doug explained to MCC that the restrictions are the same as the standard carbon target. Perhaps Arun Saha can provide update the operational restrictions list for MCC?

    02:05 Configuration change to kinematic A2; p=1.1149 GeV/c; L=20.0 degrees.

    02:15 Taking 3.5uA beam after completing the spectrometer move.

    03:15 Moved to the LH2 target.

    04:00 Configuration change to kinematic A2*; p=1.102 GeV/c; L=21.5 degrees.

    04:10 Continue with 3.5uA beam after the configuration change was successful.

    04:35 Tried to analyse run 1573, but when the computer starts the analysis, after a minute or two, it kills it and exits out of the analyser. The same thing happened for run 1563 - very strange!

    05:00 TS1 crashed and was rebooted; also needed to kill coda afterwards and reset it - several times - as it was having problems connecting to TS0. Meanwhile we moved target to the tilted carbon target.

    05:18 Beam current of 3.5uA back and we continue with the momentum scan of BigBite.

    06:08 Configuration change to kinematic A3; p=1.0986 GeV/c; L=23.0 degrees.

    06:15 Continue with 3.5uA beam on the tilted carbon target.

    07:06 Moving target to liquid hydrogen target.

    07:45 Start the configuration change to kinematic A6. Power cycle Q2 and Q3 on left HRS. L-HRS being set to 14.1 degrees - HRS movement got stuck a few times, slowing our progress!

    08:35 Configuration change completed; kinematic A6 - p=1.157 GeV/c, L-HRS = 14.1 degrees.



    Run Summary

    Kin A1* - p=1.1259 GeV/c , L=18.5 deg; beam current = 3.5uA

    23:42 - 00:07 : run 1559 ; Tilted 12C target; 250K; ps3=25; ps6=2000

    00:10 - 00:26 : run 1560; LH2 target; 122K; ps3=25, ps6=2000 (stopped as the prescale factors needed to be changed appropriately).

    00:27 - 00:28 : run 1561; JUNK (wrong prescale factors)

    00:29 - 00:42 : run 1562; LH2 target; 250K; ps3=200, ps6=1100

    00:44 - 00:57 : run 1563; LH2 target; 250K; ps3=200, ps6=1100; CANNOT ANALYSE THIS RUN - computer keeps killing it.

    01:20 - 01:21 : run 1564; JUNK (wrong prescale factors)

    01:23 - 01:45 : run 1565; Tilted 12C target; 250K; ps3=99999; ps6=350

    01:46 - 02:03 : run 1566; Tilted 12C target; 250K; ps3=99999; ps6=350.


    Kin A2 - p=1.1149 GeV/c; L-HRS=20.0 deg; beam current = 3.5uA

    02:16 - 02:33: run 1567; Tilted 12C target; 250K; ps3=99999; ps6=350

    02:34 - 02:51: run 1568; Tilted 12C target; 250K; ps3=99999; ps6=350

    02:52 - 03:15: run 1569; Tilted 12C target; 250K; ps3=20; ps6=2000

    03:24 - 03:41: run 1570; LH2 target; 250K; ps3=200; ps6=1000.

    03:42 - 04:00: run 1571; LH2 target; 250K; ps3=200; ps6=1000.



    Kin A2* - p=1.102 GeV/c; L-HRS=21.5 deg; beam current = 3.5uA

    04:08 - 04:21: run 1572; LH2 target; 150K; ps3=200; ps6=1000.

    04:22 - 04:36: run 1573; LH2 target; 250K; ps3=100; ps6=1000. CANNOT ANALYSE THIS RUN - computer keeps killing it.

    04:37 - 05:00: run 1574; LH2 target; 150K; ps3=100; ps6=1000. TS1 crashed and needed rebooted; also reset coda.

    05:21 - 05:34: run 1575; Tilted 12C target; 250K; ps3=10; ps6=1800.

    05:35 - 05:51: run 1576; Tilted 12C target; 250K; ps3=99999; ps6=300.

    05:52 - 06:07: run 1577; Tilted 12C target; 250K; ps3=99999; ps6=300.


    Kin A3 - p=1.0986 GeV/c; L-HRS=23.0 deg; beam current = 3.5uA

    06:14 - 06:30: run 1578; Tilted 12C target; 250K; ps3=99999; ps6=300.

    06:31 - 06:35: run 1579; Tilted 12C target; 50K; ps3=99999; ps6=300; stopped this run early as we inadvertently changed the prescale.dat during the run - not sure if this would have any effect though.

    06:36 - 06:50: run 1580; Tilted 12C target; 200K; ps3=99999; ps6=300.

    06:50 - 07:05: run 1581; Tilted 12C target; 250K; ps3=8; ps6=1800.

    07:15 - 07:30: run 1582; LH2 target; 250K; ps3=75; ps6=1000.

    07:31 - 07:45: run 1583; LH2 target; 250K; ps3=75; ps6=1000.