Astronomy and Astrophysics – Astronomy
Scientific paper
Nov 1989
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1989spie.1159..236b&link_type=abstract
IN: EUV, X-ray, and gamma-ray instrumentation for astronomy and atomic physics; Proceedings of the Meeting, San Diego, CA, Aug.
Astronomy and Astrophysics
Astronomy
1
Gas Detectors, Microstrip Devices, Proportional Counters, Radiation Detectors, Spaceborne Telescopes, Charged Particles, Danish Space Program, Imaging Techniques, Position Sensing, X Ray Astronomy
Scientific paper
Two wireless position-sensitive X-ray proportional counters that are being developed at the Danish Space Research Institute are described: the microstrip proportional counter (MSPC) and the parallel gas proportional counter (PGPC). The MSPC employs very narrowly spaced conducting strips deposited on an isolating substrate, thus avoiding the use of fragile wires. This detector is built like a normal axial ionization chamber with the electric field parallel to the direction of the incident radiation. The PGPC employs a uniform electric field between two parallel electrodes. The parallel gap is formed between an etched Ni mesh cathode and a segmented anode; the X-ray photon energy is derived from the mesh electrode, while the position information is obtained from the anode. Both detectors display energy signals of a very high rise-time and background rejection based on pulse shape analysis, and are, therefore, very efficient.
Bahnsen Axel
Budtz-Jorgensen Carl
Jonasson Per
Madsen Morten
Westergaard Niels Joergen
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