Pulse tube refrigeration for detectors

Pulse tube refrigeration for detectors

High purity germanium (HPGe) gamma-ray detectors are used for nondestructive assay. Liquid nitrogen (LN 2 ), a cryogen, is commonly used to cool these detectors. Cryogen use is associated with several health risks and operational problems. This has prompted the development of cryogen-free refrigerat...

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Bibliographic Details
Published in:Journal of radioanalytical and nuclear chemistry Vol. 296; no. 1; pp. 111 - 115
Main Authors: Cournoyer, M. E., Pecos, J. M., Chunglo, S. D., Bonner, C., Maez, R. J.
Format: Journal Article
Language:English
Published: Dordrecht Springer Netherlands 01-04-2013
Springer
Subjects:
Chemistry
Chemistry and Materials Science
Detectors
Diagnostic Radiology
Gamma rays
Hadrons
Health aspects
Heavy Ions
Inorganic Chemistry
Nuclear Chemistry
Nuclear Physics
Physical Chemistry
NDA
HPGe detectors
Mechanical cooler
Cryogen
Hazard elimination
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Summary:High purity germanium (HPGe) gamma-ray detectors are used for nondestructive assay. Liquid nitrogen (LN 2 ), a cryogen, is commonly used to cool these detectors. Cryogen use is associated with several health risks and operational problems. This has prompted the development of cryogen-free refrigeration. A new generation of commercial pulse tube refrigerator (PTR) has been developed during the last decade. A unique feature of the PTR is the absence of cold moving parts. This significantly reduces the generated noise and vibration. In the following report, LN 2 , a modified Joule–Thompson cooler, and a PTR unit are examined and their cooling effectiveness with HPGe gamma-ray detectors compared. Overall, PTR is an engineering equivalent to LN 2 and modified Joule–Thompson cooler systems used in gamma spectroscopy and eliminate the health and physical hazards associated with LN 2 systems without adding hazards.
Bibliography:ObjectType-Article-1
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ISSN:0236-5731
1588-2780
DOI:10.1007/s10967-012-2002-9