A fast and flexible focal-plane detection system for electron scattering experiments

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Abstract

A multiwire drift chamber detection system, with a total of 1800 sense wires, operated in the focal planes of a two-spectrometer set-up for intermediate energy electron scattering experiments, is discussed. Two-dimensional reconstruction of single-arm events with a spatial resolution of 250 μm is performed by dedicated hardware modules with a peak event rate of 5 MHz. The system is rather flexible and expandable in its applications. Special features of the system used for single-arm and coincidence reactions are discussed and test results are presented to illustrate the overall performance of the detection system.

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    Present address: MIT, Bates Accelerator, P.O. Box 95, Middleton, MA 01949, USA.

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