The Brookhaven National Laboratory's Multiparticle Spectrometer Drift Chamber System

A system of drift chambers is being built to replace the present spark chambers in the Brookhaven National Laboratory's Multiparticle Spectrometer. This system will handle a beam of ~ 3 million particles per second and have a resolution of 200 pm. A summary of the status of the chambers and the custom integrated circuits is presented. The data acquisition system is described. Prototype chambers have been built and tested with results that are consistent with the expected chamber properties.