Actively driven thermal radiation shield
Abstract
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.
- Inventors:
-
- Livermore, CA
- Pleasant Hill, CA
- Alameda, CA
- Issue Date:
- Research Org.:
- Lawrence Livermore National Laboratory (LLNL), Livermore, CA (United States)
- OSTI Identifier:
- 874467
- Patent Number(s):
- 6396061
- Assignee:
- The Regents of the University of California (Oakland, CA)
- Patent Classifications (CPCs):
-
G - PHYSICS G01 - MEASURING G01J - MEASUREMENT OF INTENSITY, VELOCITY, SPECTRAL CONTENT, POLARISATION, PHASE OR PULSE CHARACTERISTICS OF INFRA-RED, VISIBLE OR ULTRA-VIOLET LIGHT
- DOE Contract Number:
- W-7405-ENG-48
- Resource Type:
- Patent
- Country of Publication:
- United States
- Language:
- English
- Subject:
- actively; driven; thermal; radiation; shield; cooled; portable; gamma-ray; spectrometers; located; intermediate; vacuum; enclosure; detector; useful; reducing; heat; load; mechanical; cooler; additionally; extends; lifetime; electrically-powered; solid-state; detectors; dramatically; reduces; cooling; power; requirements; example; operating; 260k; 40k; below; temperature; decrease; 50; makes; battery; operation; mechanically; spectrometer; radiation shield; vacuum enclosure; /250/
Citation Formats
Madden, Norman W, Cork, Christopher P, Becker, John A, and Knapp, David A. Actively driven thermal radiation shield. United States: N. p., 2002.
Web.
Madden, Norman W, Cork, Christopher P, Becker, John A, & Knapp, David A. Actively driven thermal radiation shield. United States.
Madden, Norman W, Cork, Christopher P, Becker, John A, and Knapp, David A. Tue .
"Actively driven thermal radiation shield". United States. https://www.osti.gov/servlets/purl/874467.
@article{osti_874467,
title = {Actively driven thermal radiation shield},
author = {Madden, Norman W and Cork, Christopher P and Becker, John A and Knapp, David A},
abstractNote = {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.},
doi = {},
journal = {},
number = ,
volume = ,
place = {United States},
year = {2002},
month = {1}
}