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Miniature Long-Life Cooler for Portable Gamma Ray Detectors

Award Information
Agency: Department of Homeland Security
Branch: N/A
Contract: NBCHC050120
Agency Tracking Number: 0511043
Amount: $99,994.98
Phase: Phase I
Program: SBIR
Solicitation Topic Code: H-SB05.1-003
Solicitation Number: N/A
Solicitation Year: 2005
Award Year: 2005
Award Start Date (Proposal Award Date): 2005-06-01
Award End Date (Contract End Date): N/A
Small Business Information
1367 Camino Robles Way
San Jose, CA 95120
United States
HUBZone Owned: No
Woman Owned: No
Socially and Economically Disadvantaged: No
Principal Investigator
 James Maddocks
 (608) 265-4246
Business Contact
 Ali Kashani
Phone: (408) 507-0906
Research Institution

This proposal describes a battery operated cryocooler to be used for cooling High Purity Germanium (HPGe) detectors, commonly used for the detection of gamma rays. HPGe detectors are highly suitable for identifying nuclear materials, which is of great interest in the Department of Homeland Security (DHS) applications. HPGe detectors need to operate near 110 K requiring refrigeration for portable HPGe detectors. Portability is highly desirable and can be accomplished by means of a standalone, compact, low-vibration, efficient cryocooler. Power consumption is to be sufficiently low so that the overall system including battery packs is indeed portable. Various existing cryogenic refrigeration systems are thought not to be applicable for the current DHS application either for reasons of excessive power consumption, vibration or system mass, or for lacking reliability and efficiency. To address the refrigeration issue, we propose to develop a miniature pulse tube cooler. High frequency, pulsetube coolers (PTCs) represents the most promising technology for achieving lightweight standalone cryocoolers. Applications of this cooler include cooling of infrared and gamma ray detectors, cooling of electronics, and for use in the biomedical industry.

* Information listed above is at the time of submission. *

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