Microstrip proportional counters for X-ray astronomy

Details Microstrip proportional counters for X-ray astronomy Microstrip proportional counters for X-ray astronomy

Dec 1991

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1991nimpa.310...82b&link_type=abstract

Nuclear Instruments and Methods in Physics Research Section A, Volume 310, Issue 1-2, p. 82-87.

Physics

11

Scientific paper

Four position sensitive proportional counters will be delivered by the Danish Space Research Institute as focal plane instruments for the Soviet Danish Röntgen Telescope (SODART). These detectors will incorporate the novel microstrip electrode design. This design has been tested with xenon gas and an 55Fe X-ray source. The energy resolution is better than 14% FWHM up to gas gains of 104, the rise time of pulses from X-ray events is fast, 100 ns, allowing for efficient background rejection by rise time analysis. A position resolution of 1 mm FWHM is easily obtained by resistive charge division of the signals from the cathodes and from a wire grid placed in front of the microstrip plate. The detector performs without significant degradation of gain or energy resolution at fluxes exceeding 106/s cm2 and a total dose of 1011 photons.

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