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Proceedings Paper

Cryocooler selection considerations for outdoor gamma ray sensor cooling
Author(s): N. GurArye; N. Pundak; S. Hitch
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Paper Abstract

Screening cargo to detect nuclear materials at ports, airports, train terminals and other critical installations is one of the major challenges facing the US Department of Homeland Security and similar organizations worldwide. An effective method of identifying hidden radioactive materials is the detection of Gamma rays transmitted through the cargo container. Accurate detection and identification can be only achieved using cryogenically- cooled High Purity Germanium (HPGe) detectors. A Portal detection system developed and manufactured by ORTEC Corporation contains several such cryogenically cooled sensors (see Fig 1). This paper presents the main design considerations for selection of a cryo cooler for this application where long life, reliability, operation over extreme outdoor temperatures and with a low vibration signature are the main technical drivers. The paper further discusses the different cooling alternatives and the technical challenges of achieving a minimal foot print and interchangeability.

Paper Details

Date Published: 14 May 2007
PDF: 9 pages
Proc. SPIE 6542, Infrared Technology and Applications XXXIII, 65422M (14 May 2007); doi: 10.1117/12.722439
Show Author Affiliations
N. GurArye, Ricor Cryogenics and Vacuum Systems (United States)
N. Pundak, Ricor Cryogenics and Vacuum Systems (United States)
S. Hitch, Advanced Measurement Technology Inc. (United States)


Published in SPIE Proceedings Vol. 6542:
Infrared Technology and Applications XXXIII
Bjørn F. Andresen; Gabor F. Fulop; Paul R. Norton, Editor(s)

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