Large-area wire spark chambers with two-coordinate read-out and ferrite core memory

Abstract

Spark chambers with crossed wire planes and sensitive areas up to 240 x 130 cm 2 have been constructed for use in an electronics experiment at the CERN Proton Synchrotron. A two-coordinate read-out, which has the advantage of lower mass/cm 2 and compactness in space, has been achieved by special design of the high-voltage coupling, the ferrite core modules, and the read-out system. The spatial resolution for 1.5 mm wire spacing is ±0.5 mm and ±0.65 mm for the Iow- and for the high-voltage planes, respectively.