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A Position Sensitive Proportional Counter For The Bragg Crystal Spectrometer On Solar-A

We describe the gas proportional counter used for X-ray detection on the Solar-A Bragg Crystal Spectrometer Instrument. The sealed detector utilises a multi-anode geometry together with a wedge and wedge (or backgam-mon) cathode pattern to provide one-dimensional imaging along the dispersion axis. We discuss the development programme which has lead up the design of the Prototype Detector. Finally, we present results of the imaging performance, energy resolution and countrate capability.