Multi-anode resistive wire proportional counter as a focal plane detector

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 350 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. (orig.)