[Gate-users] Impossible (or Improbable ) timestamps for Randoms Coincidences

[KB]

Hello all.

    Plotting (time1-time2) for all the randoms coincidences, I notice that
the lower value is a sharp cutoff (just as I expect) but the higher value is
over and beyond the coincidence window. With my coincidence window set to 6
ns, I see (time1-time2) values as high as 89 ns.

I have plotted (time1-time2) and uploaded the plot here:
http://img337.imageshack.us/img337/4598/gatetalkhm9.gif

The relevant lines from my digitiser are:

/gate/digitizer/Coincidences/setWindow 6.0 ns
/gate/digitizer/Coincidences/minSectorDifference 7
/gate/digitizer/Coincidences/MultiplesPolicy takeAllGoods
/gate/digitizer/name delay
/gate/digitizer/insert coincidenceSorter
/gate/digitizer/delay/setWindow 6.0 ns
/gate/digitizer/delay/setOffset 500.0 ns
/gate/digitizer/delay/MultiplesPolicy  takeAllGoods


I am interested in knowing why I get randoms coincidences beyond the
coincidence window. Thanks for any help.

Karthik.
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