A high resolution gas scintillation proportional counter for studying low energy cosmic X-ray sources

Astronomy and Astrophysics – Astronomy

Scientific paper

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Astronomical Photometry, Proportional Counters, Scintillation Counters, X Ray Sources, Boric Acids, Carbon, Energy Spectra, High Resolution, Noise Reduction, Sulfur

Scientific paper

In recent years much effort has been devoted to the development of large area gas scintillation proportional counters (GSPCs) suitable for use in X-ray astronomy. The paper deals with a low-energy GSPC for use in detecting sub-keV X-rays from cosmic sources. This instrument has a measured energy resolution of 85 eV (FWHM) at 149 eV over a sensitive area of 5 sq cm. The development of imaging capability for this instrument is discussed. Tests are performed on the feasibility of using an arrangement of several phototubes placed adjacent to one another to determine event locations in a large flat counter. A simple prototype has been constructed and successfully operated.

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