Abstract

A resistive-wire position-sensitive proportional counter used in the focal plane of a magnetic spectrograph has been improved by a multi-anode arrangement available for the non-normal incidence of particles. The achieved position resolution is 0.75 mm fwhm for 28 MeV protons and 0.9 mm fwhm for 50 MeV protons with an incidence angle of 35° to the wire axis. The non-normal incidence effect is also described with a measurement of the angle dependence of the position resolution in a simple resistive-wire proportional counter.

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