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    User name R. Michaels

    Log entry time 23:13:16 on June24,2004

    Entry number 126743

    This entry is a followup to: 126708

    keyword=profile scan part 4 (last for now)

    Next step, we turn on VDC HV. (Oops, done during run 1170
    after at least 100K into run).

    We will do a series of short runs at different X,Y positions
    to calibrate profile scanner versus VDCs.

    Piotr reminds me that Labview "X" is short axis and "Y"
    is the long axis. This means Labview "X" is spectr. Y.


    .............. Left HRS ....................... Right HRS

    Run....Labview......Spectr.Scaler......Labview....Spectr.Scaler
    ...... X .... Y ..... X .... Y ...... X .... Y .... X .... Y
    ........ (cm) ......... (MHz) ........ (cm) ....... (MHz)

    1171 .. 17 ... 33 .. 1.11 ... 1.17 ... 17 ... 33 ... 1.11 .. 1.17

    1172 .. 17 ... 30 .. 1.11 ... 1.09 ... 17 ... 30 ... 1.08 .. 1.10

    1173 .. 23 ... 30 .. 1.37 ... 1.09 ... 23 ... 30 ... 1.34 .. 1.10

    1174 .. 12 ... 27 .. 0.89 ... 1.01 ... 12 ... 27 ... 0.86 .. 1.02

    These data show we can calibrate spectr.scaler X,Y versus Labview,
    but unfortunately when we look at VDC data we cannot see (online)
    a definite spot in X,Y when we cut on profile scanner PMT amplitude
    or on event type bits, or combinations of those. We'll need to
    scratch our heads to figure this out. Perhaps the rates are
    still too high for VDCs. Or the profile scanner PMT is noise (??)

    Scanner parked out of the way.

    We move on to the next program ... alignment of elastic peak.