Performance Of The Position Sensitive Proportional Counter Of The ROSAT Telescope

E. Pfeffermann; U. G. Briel

doi:10.1117/12.966582

14 July 1986 Performance Of The Position Sensitive Proportional Counter Of The ROSAT Telescope

E. Pfeffermann, U. G. Briel

Proceedings Volume 0597, X-Ray Instrumentation in Astronomy; (1986) https://doi.org/10.1117/12.966582
Event: 1985 International Technical Symposium/Europe, 1985, Cannes, France

Abstract

A multiwire proportional counter as the prime focal instrument of the ROSAT X-ray telescope has been developed and built. It has a sensitive area of 80 mm diameter (corresponding to a FOV of 2 Deg.) and is designed for an X-ray energy range from 0.1 to 2.0 keV. The energy resolution for 0.93 keV is 45% (FWHM), averaged over the entire sensitive area. Local deviations of the gas gain from the mean value are as small as 3%. For X-ray energies at 0.28 and 0.93 keV, the mean position resolution is 0.4 and 0.25 mm (FWHM), respectively. Deviations of measured pinhole positions from their nominal positions are less than 0.02 mm (for 0.93 keV). Using different methods of background rejection, a rejection efficiency of better than 99% is achieved.

Citation Download Citation

E. Pfeffermann and U. G. Briel "Performance Of The Position Sensitive Proportional Counter Of The ROSAT Telescope", Proc. SPIE 0597, X-Ray Instrumentation in Astronomy, (14 July 1986); https://doi.org/10.1117/12.966582

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