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    User name X. Jiang

    Log entry time 15:18:13 on April26,2009

    Entry number 268760

    keyword=Run plan starting Sunday swing


    Run plan Sunday swing, starting swing shift 16:00 04/26/2009.
    (Xiaodong Jiang, updated at 15:00)

    1. Continue with Pol. He3 in Longitudianal+ direction,

    Take elastic runs for 3-4 h total, ask MCC to change beam halfwave plate half way in
    between. Take T1 (on Right HRS) and T3 (on left HRS) only

    Then, target polarization measurement.
    Rotate target to vertical, keep pumping.

    2. Change both arm to P_HRS=1.1759 GeV/c, one pass production kinematics (Q.E.)

    Turn fake target-spin signal on (Jin+Yi), for Joe to check Lumi data in HRS.

    3. Reference cell H2 run, 100 psig. P_HRS=1.1759 GeV/c
    Make sure BigBite, Neutron detector HV are on.

    H(e,e') run, both arm, 2 runs, 10 min. each. Miha in charge of prescale factor change.
    After this activity, change pre-scaler factor back to take T1 (on Right HRS)
    and T3 (on left HRS) only.
    Turn off BigBite HV.

    email Doug with the above run numbers.

    4. Reference cell N2 run, pressure 15 psig (on the gauge). P_HRS=1.1759 GeV/c
    Take T1 (on Right HRS) and T3 (on left HRS) only.

    2~5 uA beam, two runs each arm, ~10 min each. Clearly halog reference cell pressure.

    5. Change both arm back to P_HRS=1.2205, cycle Q2/Q3.
    Purge reference cell.

    6. He3 cell pressure curve runs. P_HRS=1.2205,
    Reference cell He3 with pressure 0, 5, 50 100, 135 psig (on the gauge).
    Clearly halog reference cell pressure.
    On both arm, one run each step, ~10 min. each run.

    Take T1 (on Right HRS) and T3 (on left HRS) only.
    !!! Do not purge reference cell at the end !!!

    7. Target should be recovered.
    Return back to polarized He3, rotate target to Longitudianl"-".
    Take T1 (on Right HRS) and T3 (on left HRS) only.
    Run for 3-4 h, ask MCC to change beam half wave plate half way in between.

    8. At the end of this activity, set both arm to P_HRS=1.1759 GeV/c
    Prepare target for vertical pumping.
    Ready to start Ay physics at one pass.