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    User name Michaels/Calarco

    Log entry time 12:43:52 on January 9,2001

    Entry number 54120

    Followups:

    keyword=Checks of Trigger

    We checked the timing of the trigger for several kinematics of e94104.
    ----------
    Notation:
    DT(1,3) = delay of T1 to T3. T3 is L-arm, T1 is R-arm, and
    T1 usually comes later to form coinc. T3 width is 70 nsec, T1 width
    is 20 nsec, and due to TS overlap window 10 nsec the randoms window
    should be 70+20+10=100 nsec.
    TSTN= Timing at trigger supervisor (TS) of Trigger N=1,3 relative to 5.
    RTTN = Timing at retiming circuit (RT) of Trigger N = 3,5 (Level 1 accept
    from trigger supervisor relative to retiming pulse of scint, the scint is later.)
    TCR = The coinc time on Right spectrometer (it is what ESPACE'rs usually see).
    TCL = Coinc time on L-arm
    PID P=proton, pi=pion, E=electron
    Units: Mom=MeV/c, delay=nsec.. Sign: Calc delay positive means L-arm slower.
    Kine...Left Arm...Right Arm........Delay.........DT(1,3)...TST1..TST3...RTT3...RTT5
    .....PID/Mom...PID/Mom....Calc..TCR/TCL
    0....P/4000......E/4000..........+2.....152/262.......28...........32.......60.........35.......100
    1....P/418........pi/706..........+122...275/145......30............35.......60.........30.......95
    2....P/578........pi/630..........+75.....226/195.......30...........35.......60..........30.......95
    5....P/727........pi/838..........+53.....200/225.......32...........34.......58.........35........95
    8....P/978........pi/1220........+32.....184/235.......30...........35........60........35........100
    15..P/2195......pi/1866.........+7.......152/265......30...........34........60........30.........95
    16..pi/3489......P/1300........-20......136/285......30...........34.......60.........35........100
    If the kinematics need to be in more extreme delays than these (i.e. beyond
    the range -20 to +122 nsec), please contact us. E.g. if the run plan changed
    and we don't know about it.
    Note, these are values of TC you should see in data. The results show that
    the timings at critical points are independent of momentum, as it should be.
    Also note, the delays move in discrete jumps of 8 nsec (the least-count.)