A Drift Multiwire Proportional Counter for Cosmic Soft X-Ray Imaging

Multiwire proportional counters with 1 μm polypropylene windows, of dimensions 75 mm × 75 mm and 100 mm × 100 mm, have been built to map soft cosmic X-rays. The counters are constructed with a large drift region which allows us to use the center-of-gravity technique to improve the counter's eff...

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Bibliographic Details
Published in:IEEE transactions on nuclear science 1979-02, Vol.26 (1), p.46-53
Main Authors: Reid, Paul B., Ku, William H.-M., Long, Knox S., Novick, Robert, Pisarski, Ryszard L.
Format: Article
Language:English
Subjects:
Anodes
Astronomy
Cathodes
Clouds
Counting circuits
Energy resolution
Plastics
Tungsten
Wire
X-ray imaging
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Summary:Multiwire proportional counters with 1 μm polypropylene windows, of dimensions 75 mm × 75 mm and 100 mm × 100 mm, have been built to map soft cosmic X-rays. The counters are constructed with a large drift region which allows us to use the center-of-gravity technique to improve the counter's efficiency and position resolution. Using 330 Torr of propane as the gas fill and an anode plane composed of 20 μm diameter, gold-plated tungsten wire spaced 1 mm apart, we have achieved a position resolution of better than 280 μm (FWHM) in two orthogonal directions at an X-ray energy of 0.94 keV.
ISSN:0018-9499
1558-1578
DOI:10.1109/TNS.1979.4329611