Performance of microstrip proportional counters for x-ray astronomy on spectrum-roentgen-gamma

Carl Budtz-Jørgensen, A BAHNSEN, Finn Erland Christensen, MM MADSEN, C OLESEN, HW SCHNOPPER

Research output: Contribution to journalConference articleResearchpeer-review


DSRI will provide a set of four imaging proportional counters for the Danish-Soviet X-ray telescopes XSPECT/SODART. The sensor principle is based on the novel micro-strip proportional counter (MSPC), where the strip electrodes are deposited by photolithography onto a rigid substrate. The MSPC offers many advantages : A uniform gas gain, an excellent energy resolution, the possibility to match the strip pitch to the desired positron resolution, a fast charge collection and low operating voltages. However, a stable behaviour of the MSPC requires a careful choice of both substrate and strip electrode material. The low energy detectors will be equipped with polyimide windows of 0.5 pm thickness, providing a high quantum efficiency even at 200 eV with an energy resolution comparable to that of solid state detectors. The MSPC is capable of operating at high counting rates (iO ph s1) and the electronics is designed to match this capability.
Original languageEnglish
Article number429
JournalProceedings of SPIE, the International Society for Optical Engineering
Number of pages9
Publication statusPublished - 1991
EventEUV, X-Ray, and Gamma-Ray Instrumentation for Astronomy II - Dan Diego, CA, United States
Duration: 21 Jul 199121 Jul 1991


ConferenceEUV, X-Ray, and Gamma-Ray Instrumentation for Astronomy II
LocationDan Diego, CA
CountryUnited States

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