Actively driven thermal radiation shield

Patent · Tue Jan 01 04:00:00 EST 2002

OSTI ID:874467

Madden, Norman W ^[1]; Cork, Christopher P ^[2]; Becker, John A ^[3]; Knapp, David A ^[1]

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1. Livermore, CA
2. Pleasant Hill, CA
3. Alameda, CA

A thermal radiation shield for cooled portable gamma-ray spectrometers. The thermal radiation shield is located intermediate the vacuum enclosure and detector enclosure, is actively driven, and is useful in reducing the heat load to mechanical cooler and additionally extends the lifetime of the mechanical cooler. The thermal shield is electrically-powered and is particularly useful for portable solid-state gamma-ray detectors or spectrometers that dramatically reduces the cooling power requirements. For example, the operating shield at 260K (40K below room temperature) will decrease the thermal radiation load to the detector by 50%, which makes possible portable battery operation for a mechanically cooled Ge spectrometer.

• Research Organization: Lawrence Livermore National Laboratory (LLNL), Livermore, CA
• DOE Contract Number: W-7405-ENG-48
• Assignee: The Regents of the University of California (Oakland, CA)
• Patent Number(s): US 6396061
• OSTI ID: 874467
• Country of Publication: United States
• Language: English

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