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Title: Thermal Design and Performance of the Gamma-Ray Spectrometer for the MESSENGER Spacecraft

Abstract

A gamma-ray spectrometer (GRS) has been built and delivered to the Mercury MESSENGER spacecraft which launched on August 3, 2004, from Cape Canaveral, Florida. The GRS, a part of seven scientific instruments on board MESSENGER, is based on a coaxial high-purity germanium detector. Gamma-ray detectors based on germanium have the advantage of providing excellent energy resolution, which is critical to achieving the science goals of the mission. However, germanium has the disadvantage that it must operate at cryogenic temperatures (typically {approx}80 K). This requirement is easy to satisfy in the laboratory but difficult near Mercury, which has an extremely hot thermal radiation environment. To cool the detector, a Stirling cycle mechanical cooler is employed. In addition, radiation and conduction techniques a are used to reduce the GRS heat load. Before delivering the flight sensor, a complete thermal prototype was built and tested. The results of these test, including thermal design, radiative and conductive heat loads, and cooler performance are described.

Authors:
; ; ; ; ; ; ; ;
Publication Date:
Research Org.:
Lawrence Livermore National Lab. (LLNL), Livermore, CA (United States)
Sponsoring Org.:
USDOE
OSTI Identifier:
15014669
Report Number(s):
UCRL-CONF-207362
TRN: US200802%%1436
DOE Contract Number:  
W-7405-ENG-48
Resource Type:
Conference
Resource Relation:
Journal Volume: 1; Conference: Presented at: IEEE, 14th International Workshop on Room-Temperature Semiconductor X- and Gamma-Ray Detectors, Rome, Italy, Oct 16 - Oct 22, 2004
Country of Publication:
United States
Language:
English
Subject:
71 CLASSICAL AND QUANTUMM MECHANICS, GENERAL PHYSICS; 42 ENGINEERING; CRYOGENICS; DESIGN; ENERGY RESOLUTION; GERMANIUM; HEAT EXCHANGERS; MERCURY; PERFORMANCE; RADIATIONS; SPECTROMETERS; STIRLING CYCLE; THERMAL RADIATION

Citation Formats

Burks, M, Cork, C P, Eckels, D, Hull, E, Madden, N W, Miller, W, Goldsten, J, Rhodes, E, and Williams, B. Thermal Design and Performance of the Gamma-Ray Spectrometer for the MESSENGER Spacecraft. United States: N. p., 2004. Web. doi:10.1109/NSSMIC.2004.1462219.
Burks, M, Cork, C P, Eckels, D, Hull, E, Madden, N W, Miller, W, Goldsten, J, Rhodes, E, & Williams, B. Thermal Design and Performance of the Gamma-Ray Spectrometer for the MESSENGER Spacecraft. United States. https://doi.org/10.1109/NSSMIC.2004.1462219
Burks, M, Cork, C P, Eckels, D, Hull, E, Madden, N W, Miller, W, Goldsten, J, Rhodes, E, and Williams, B. 2004. "Thermal Design and Performance of the Gamma-Ray Spectrometer for the MESSENGER Spacecraft". United States. https://doi.org/10.1109/NSSMIC.2004.1462219. https://www.osti.gov/servlets/purl/15014669.
@article{osti_15014669,
title = {Thermal Design and Performance of the Gamma-Ray Spectrometer for the MESSENGER Spacecraft},
author = {Burks, M and Cork, C P and Eckels, D and Hull, E and Madden, N W and Miller, W and Goldsten, J and Rhodes, E and Williams, B},
abstractNote = {A gamma-ray spectrometer (GRS) has been built and delivered to the Mercury MESSENGER spacecraft which launched on August 3, 2004, from Cape Canaveral, Florida. The GRS, a part of seven scientific instruments on board MESSENGER, is based on a coaxial high-purity germanium detector. Gamma-ray detectors based on germanium have the advantage of providing excellent energy resolution, which is critical to achieving the science goals of the mission. However, germanium has the disadvantage that it must operate at cryogenic temperatures (typically {approx}80 K). This requirement is easy to satisfy in the laboratory but difficult near Mercury, which has an extremely hot thermal radiation environment. To cool the detector, a Stirling cycle mechanical cooler is employed. In addition, radiation and conduction techniques a are used to reduce the GRS heat load. Before delivering the flight sensor, a complete thermal prototype was built and tested. The results of these test, including thermal design, radiative and conductive heat loads, and cooler performance are described.},
doi = {10.1109/NSSMIC.2004.1462219},
url = {https://www.osti.gov/biblio/15014669}, journal = {},
number = ,
volume = 1,
place = {United States},
year = {2004},
month = {10}
}

Conference:
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