• Main INDEX
  • Monthly INDEX
  • PREV
  • NEXT

    User name R. Michaels

    Log entry time 13:21:18 on May29,2008

    Entry number 240271

    keyword=cavity test, part III.

    Run 21041 with I_beam = 9.5 uA and (x,y) = (+2, +2).
    Musson is trimming some phases.
    The beam is tripping off a lot.
    This time the analyzer worked and I could check data quality.

    Moving to x,y = (-2, +2).
    Run 21042 -- analyzer crashing again. bummer.
    Rates here (for I_beam = 9.6 uA) are
    T1 = 12.7 Hz
    T3 = 460 Hz
    T4 = 3450 Hz

    Next, reduce beam current to 1 uA. Leave (x,y) = (-2,+2).
    Run 21043. Miracle: it analyzes.
    Rates:
    T1 = 12.5 Hz ... as if it's off ?
    T3 = 60 uA ... I guess this is the most reliable.
    T4 = 1430 Hz
    (Idea was to use a trigger to monitor low-I, but this seems
    problematic since T3 is low -- HRS at big angle -- and T1 is out
    to lunch, and T4 is S1.or.S2 hence noisy)

    Run 21044. Same I = 1uA, and now (x,y) = (+2, +2).

    Run 21045, Same I = 1uA, now (x,y) = (-2,-2).