¥DVCS Calorimeter Trigger
System must search for the clusters produced by photons or electrons; normally presence of at
least two clusters will be required for calibration runs (search
for two photons from pi0 decay) and at least one cluster for
production runs (search for one electron)
¥Cluster is defined as more
then N towers (N<=9) with energy deposition above threshold located within 3x3 towers rectangular area (figure on following slide)
¥CAEN v895B discriminators and
v1495 logic unit will be used
¥Hodoscope will be installed in
front of DVCS calorimeter, it must part of the trigger system as well