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    User name Saha

    Log entry time 14:42:28 on February14,2000

    Entry number 33952

    keyword=Hall A Beam Optics studies

    The Last few hours, we checked the beam optics to Hall A

    It looks good, as predicted from optics. (All numbers are in microns)

    In Achomatic mode, 5 uA cw, we obtain the following:

    Scanner # 1 Dx = 64, Dy = 64
    Scanner # 2 Dx = 109, Dy = 55
    Scanner # 3 Dx = 36, Dy = 49
    Scanner # 4 Dx = 32, Dy = 44
    Scanner # 5 Dx = 94, Dy = 110
    Scanner # 6 Dx = 98, Dy = 125 --> Beam spot size at Hall A Target

    Scanners 1,2,3,4 Average of Scan# 519, 520
    Scanners 5,6: Scan #521

    OTR (@10 uA) Dx = 145, Dy = 85
    OTR (@100 uA) Dx = 165, Dy = 100

    See ELOG Entry #100877 for OTR widths vs Current

    Dispersive mode optics , 5 uA cw

    Scanner # 1 Dx = 98, Dy = 80
    Scanner # 2 Dx = 97, Dy = 79
    Scanner # 3 Dx = 502, Dy = 154
    Scanner # 4 Dx = 695, Dy = 131

    OTR (@5uA) Dx = 140, Dy = 80

    Back to Achromatic Mode (14:30pm). 5 uA cw
    Scan #525
    Scanner # 5 Dx = 103, Dy = 85
    Scanner # 6 Dx = 105, Dy = 95 --> Beam spot size at Hall A Target

    Beam position at target

    3Ax Medm 0.175 right ; Scanner#5 0.377 left
    3Ay Medm 0.037 up ; Scanner#5 0.258 up
    3Bx Medm 0.283 right ; Scanner#6 0.490 right
    3By Medm 0.023 down ; Scanner#6 0.019 up