The HE 1 MWPC Acquisition System

This system has been designed to fullfill the needs of (e,e') and (e,e'p) experiments at the 600 MeV Linear Accelerator of Saclay. The configuration of the experimental set-up consists in two high resolution spectrometers and associated detectors. Localization of the particle is done for each spectrometer, through a set of two multiwires proportional chambers; one being in the focal surface of the spectrometer. The time definition of the event will be taken from the fast coincidence of two high speed detector arrays. The main characteristic of this system is that it must accommodate the necessary high counting rate. The essential features of this realization are briefly described hereunder.