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    User name M JOnes

    Log entry time 14:35:33 on October 2,2000

    Entry number 49065

    keyword=multi-hit in VDC

    multi-hit in VDC.
    There is a difference in the handling of mulithits in the VDC in
    dataspy and espace. One can see that espace picks the shortest
    time and dataspy picks the longest time. With common stop
    TDC it seems to me that picking the longest time is the
    best policy. I will send a note to Nilanga and see if he agrees.

    data spy output

    total # of hits:
    plane 1 : 10
    plane 2 : 9
    plane 3 : 8
    plane 4 : 10

    after multihit elimination :
    plane 1 8
    hit, wire 1 221 time 1265.0
    hit, wire 2 222 time 1412.0
    hit, wire 3 223 time 1586.0
    hit, wire 4 224 time 1649.0
    hit, wire 5 225 time 1800.0
    hit, wire 6 226 time 1649.0
    hit, wire 7 227 time 1502.0
    hit, wire 8 228 time 1355.0

    For espace output:

    wdctr.vdcu1e= 10

    All raw hits

    1 221 1265
    2 222 1412
    3 223 1586
    4 224 1584
    5 224 1649
    6 225 1800
    7 226 1545
    8 226 1649
    9 227 1502
    10 228 1355

    Hits selected
    1 1 221 1265
    2 2 222 1412
    3 3 223 1586
    4 4 224 1584
    6 5 225 1800
    7 6 226 1545
    9 7 227 1502
    10 8 228 1355