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    User name K. Aniol

    Log entry time 18:38:33 on May10,2002

    Entry number 3108

    keyword=Beam spot size/harp scan

    We compared the beam spot size from harp scan 1642 at 5.562Gev to the current spot size at 3.36GeV.

    harp scan runs
    run 1642 , H = 213u, V = 74u, E = 5.562 GeV
    run 1672, H = 183u, V = 92u, E = 3.36 GeV

    to run the harp scan, reduce beam current, limit is 5uA!
    start at the magnet control screen, hacsbc2
    on "Hall A Main Menu" click on "ARC Scanners"
    click on "Scanner Control Screen"

    screen pops up, push "START" button
    after scan is done push "SAVE" button, note run number

    go to Accelerator screen, HIRSEXT20
    on ACCELERATOR MAIN MENU panel
    click the Hall A "!" button
    click on "Hall A Scanners and ARC Integral Analysis"
    pop up screen appears "Beam Energy Measurement"
    click on "Run arc-scan" button
    on pop up screen, enter the run number
    on this pop up screen more text now appears, push the "last" button
    on graphics pop up screen push "exit"
    new pop up screen gives beam position and widths