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    User name R. Michaels

    Log entry time 21:32:52 on June24,2004

    Entry number 126708

    Followups:

    keyword=profile scanner alignment, part 1.

    Executing the run plan for profile scanner alignment wrt VDCs.
    Momentum settings 2.678 (both HRS).
    Left Septum current 248.00
    Right Septum current 247.50
    This is ~10% below elastic peak, as planned.
    Beam current 0.5 uA (what we asked for, but our monitor says 0.36)

    High Voltages
    Left HAPPEX PMT1 1700
    Left HAPPEX PMT2 1700
    Right HAPPEX PMT1 1700
    Right HAPPEX PMT2 1700
    Left Profile Scanner PMT 1550
    Right Profile Scanner PMT 1550
    (We tried Profile HV 1600 for a minute but the rates were
    10x higher, so we backed off.)

    Rates :
    S2 rates are of order 20 kHz/paddle, somewhat evenly spread. Ok.
    Left HAPPEX PMT1 11 kHz
    Left HAPPEX PMT2 23 kHz
    Right HAPPEX PMT1 23 kHz
    Right HAPPEX PMT2 6 kHz
    Left Profile Scanner PMT 1.5 kHz
    Right Profile Scanner PMT 18 kHz
    Triggers:
    T1 = 215 kHz
    T2 = 27 kHz
    T3 = 200 kHz
    T4 = 32 kHz
    T5 = 18 kHz
    T6 = 1.6 kHz
    The above was with Profile scanners "parked" out of acceptance.
    Now we put them somewhere into acceptance.
    T5 = 17 kHz
    T6 = 1 kHz .... odd, not much change ... probably something
    wrong but take runs 1163 and 1164 for check.

    May need some HV adjustment. Do a run to see ADC spectra.
    VDCs still off.