Preliminary trigger studies for the PEP-N detector

A very preliminary study for a trigger for the PEP-N experiment is presented. Its aim is to show the feasibility of a very efficient trigger for multihadronic events based on energy releases in the electromagnetic calorimeter. Though the efficiency of such a trigger is very high and simple topology requirements can be applied to reduce cosmic background, an accurate study of machine background is going to be made to provide final trigger design and performance.