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    User name M.Shabestari

    Log entry time 08:16:14 on April16,2008

    Entry number 232330

    keyword=Owl Shift Summary

    Owl shift summary April 16, 2008

    SL : Mitra Shabestari
    TO : Mitra Shabestari
    3rd : Khem Chirapatpimol


    pi0 Production : Kinematics F
    BigBite = 54 degrees, LHRS = 14.5 degrees.



    00:00 Shift started. Target had problem with HPH. Waiting for target to cool down.

    00:42 Called MCC and asked for beam permit. Moved to BeO target to check the beam positions.

    ---- We checked position on BeO, asked MCC to restore nominal values. Requested a harp scan. IHA1H03A was not working well.
    On 1H03B we had sigmas around 100 microns in x and y.
    Checked the holey carbon T1 and T2 rates against empty target rates at 5 uA.

    Empty - T1 16000 Hz T2 19000 Hz
    Holey Carbon - T1 15000 Hz T2 18000 Hz

    ---- Taking Ta calibration data.
    ---- Taking C calibration data.

    03:09 Turned BigBite magnet to 0 uA


    ---- ROC9 has problem.It keeps rebooting itself. We did soft reboot several times, which didn't solve the problem.
    Then, followed the instruction on the "BigBite DAQ Wiki". ROC9 still reboots itself. Had to call Bryan. Sorry!
    ROC9 had to be reset locally. Going to controlled access.

    ----- Back to beam permit
    ----- Continued taking data with carbon at 2uA. Rates were too high. Decreased current to 1 uA.

    06:00 MCC called and notified us that they are going to take the beam away for a while.
    06:11 MCC called they are going to send beam.

    06:12 Run# 3130 (events = 1 M) Carbon, test data, Magnet off
    06:33 Run# 3131 Rebooted ROC9 and ROC10

    07:03 Skipped taking data with Al dummy (magnet off).ROC9 crashed frequently. We will continue with part II of kinematics F

    07:05 Turned Bigbite magnet on. Set current to 390A, and set momentum on LHRS to 1.147 GeV/c

    07:11 Moved target to LH2, and asked MCC for 4uA current.

    07:15 Following the beam trip, HV on S4,S6, S7, and S14 tripped.

    07:23 Run# 3135 ; elastic LH2; (events = 440 K)

    07:29 Run# 3136 ; elastic LH2; (events = 400 K)

    07:35 Run# 3137 ; elastic LH2; (events = 500 K)

    07:43 Changed momentum to 0.997 GeV/c to start production Pi0 kinematics

    07:54 Run# 3138; Production LH2