The position sensitive proportional counter (PSPC) of the Rosat telescope

Details The position sensitive proportional counter (PSPC) of the Rosat telescope The position sensitive proportional counter (PSPC) of the Rosat telescope

Jan 1986

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1986nimpa.242..376b&link_type=abstract

Nuclear Instruments and Methods in Physics Research Section A, Volume 242, Issue 3, p. 376-381.

Physics

13

Scientific paper

A position sensitive proportional counter for X-rays in the energy range from 0.1 to 2.0 keV has been developed and tested. It is the prime focal instrument of the Rosat X-ray telescope, a satellite-observatory, which will be launched in 1987. Over the entire sensitive circular area of 80 mm diameter, the energy resolution for 0.93 keV X-rays is 45%. Local deviations of the gas gain from the mean value is less than 3%. For X-ray energies of 0.93 and 0.28 keV, the mean position resolution is 250 and 400 μm (fwhm) respectively. When correcting the position of each X-ray event, we achieve differences between the nominal and the measured position of pinholes of less than 20 μm. Operating the PSPC in the environment of a 60Co gamma-ray source, we measured an overall background rejection of more than 99%.

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