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1 January 1988 A Large aperture imaging gas scintillation proportional counter
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An imaging gas scintillation proportional counter (GSPC) having a 70 mm diameter thin polypropylene entrance window has been built. The detector is of the so called driftless type. In this concept the X-rays are absorbed directly in the scintillation region whereas in conventional GSPCs a separate drift region with a lower electric field is used. The advantages of a driftless GSPC are its improved low energy response and higher background rejection efficiency. Position sensitive read-out of the scintillation light is performed by means of a 5" Hamamatsu photomultiplier with mesh dynodes and crossed-wire anode. In this article we present energy and position resolution measurements obtained with this detector at several X-ray energies. For example values of 16.0 % and 1.9 mm full width at half maximum (FWHM) energy and position resolutions have been measured at an energy of 1487 eV. Some present limitations will be discussed and an outline of future developments will be given.
© (1988) COPYRIGHT Society of Photo-Optical Instrumentation Engineers (SPIE). Downloading of the abstract is permitted for personal use only.
Marc Heppener and Dirk G. Simons "A Large aperture imaging gas scintillation proportional counter", Proc. SPIE 0982, X-Ray Instrumentation in Astronomy II, (1 January 1988);

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