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Proceedings Paper

Imaging Proportional Counter For X-Ray Astronomy
Author(s): K. S. Long; P. B. Reid; W. H.M. Ku; D. D. Mitchell; R Novick; R. L. Pisarski
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Paper Abstract

A position-sensitive proportional counter capable of imaging X-rays (0.1-3 keV) over a 10 cm x 10 cm aperture has been constructed. Positioning is obtained by sensing the sig-nals induced by an X-ray event on the two orthogonal sets of cathode wires. Each cathode is divided into a series of cathode strips, each 0.5 cm wide. An X-ray event induces signals on several adjacent strips. Signals from each cathode strip are amplified separately and then added in an equally weighted and an unequally weighted summing amplifier. The position in each direction is obtained by dividing the output of the unequally weighted summer by that of the equally weighted summer. At 0.94 keV, the accuracy of the position sensing is 190 1.1m. At the same energy, the energy resolution is -65% (FWHM). The proportional counter system is currently being incorporated into a sounding rocket payload having metal mirror optics, which is being constructed by the X-ray astronomy group at the California Institute of Technology.

Paper Details

Date Published: 9 August 1979
PDF: 8 pages
Proc. SPIE 0184, Space Optics Imaging X-Ray Optics Workshop, (9 August 1979); doi: 10.1117/12.957457
Show Author Affiliations
K. S. Long, Departments of Astronomy and Physics (United States)
P. B. Reid, Departments of Astronomy and Physics, (United States)
W. H.M. Ku, Departments of Astronomy and Physics, (United States)
D. D. Mitchell, Departments of Astronomy and Physics, (United States)
R Novick, Departments of Astronomy and Physics, (United States)
R. L. Pisarski, Departments of Astronomy and Physics, (United States)

Published in SPIE Proceedings Vol. 0184:
Space Optics Imaging X-Ray Optics Workshop
Martin C. Weisskopf, Editor(s)

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