Design and construction of a low-background,internal-source proportional counter |
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Authors: | Craig E Aalseth Anthony R Day Eric W Hoppe Todd W Hossbach Brian J Hyronimus Martin E Keillor Kevin E Litke Esther E Mintzer Allen Seifert Glen A Warren |
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Institution: | (1) Pacific Northwest National Laboratory, 902 Battelle Boulevard, MSIN P8-01, Richland, WA 99352, USA |
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Abstract: | High-purity copper has emerged as a preferred construction material for ultra-low-background HPGe spectrometers and offers
excellent bulk radiopurity along with good electrical, thermal, and vacuum properties. Recently, these materials and techniques
have been applied to the construction of low-background internal-source gas proportional counters. This work describes the
design, construction, and testing of an ultra-low-background internal-source gas proportional counter built primarily of high
purity electroformed copper. Energy resolution of ~10% FWHM at 59.5 keV has been achieved, a low-energy threshold of ~3 keV
has been reached, and gas gain stability over a 4-week period has been demonstrated. Progress toward low-background operation
is described. |
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Keywords: | |
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