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    User name R. Michaels

    Log entry time 12:23:45 on April23,2007

    Entry number 199761

    keyword=T5, T6 overlap check

    I made some checks of the T5 and T6 overlap with pulser.
    Of course, we had done this before the experiment too.
    There is some concern that perhaps one of these triggers
    becomes inefficient due to wrong timing.

    The picture shows the R-arm signal with 'RRRRR' and the
    L-arm signal with "LLLLL", and the horizontal direction
    is time (length of string proportional to time).

    The L-arm is T3 in each case, and T3 always defines the timing.


    T5 = T1.and.T3

    RRRRRRRRRRRRRRRRRRRRRRRRRR T1, 132 nsec wide
    ........LLLLLLLLLL............ T3, 52 nsec wide, delayed 23 nsec


    T6 = R-arm-RT .and. T3

    RRRRRRRRRRRRRRRRRRRRRRRRRRRRRR R-arm RT, 158 nsec wide (fluct to 198)
    ..........LLLLLLLLLL.............. T3, 52 nsec wide, delayed 34 nsec

    These pictures are stable with pulser down to a He4 momentum of
    about 1000 MeV/c. Below that we have dynamic range problem
    of the EDTM (pulser), and the L-arm slides later but is always
    making a trigger. For physical signals the picture should be
    stable, of course. The R-arm can have a range of 20 nsec across
    the focal plane but will always make a trigger.

    I double checked that the delays don't run out of dynamic range.
    Conclusion: everything is fine.