Germanium detector with Stirling cryocooler for lunar gamma-ray spectroscopy

The gamma-ray spectrometer (GRS) of Japanese lunar polar orbiter SELENE uses a Ge detector for the first time on a lunar mission. This spectrometer will observe lunar gamma rays for 1 year or more to determine chemical composition over the entire lunar surface. For cooling the Ge detector, we adopte...

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Published inNuclear instruments & methods in physics research. Section A, Accelerators, spectrometers, detectors and associated equipment Vol. 548; no. 3; pp. 401 - 410
Main Authors Kobayashi, Masanori, Hasebe, Nobuyuki, Hiramoto, Takuji, Miyachi, Takashi, Murasawa, Satoshi, Okada, Hiroyuki, Okudaira, Osamu, Yamashita, Naoyuki, Berezhnoy, Alexey A., Shibamura, Eido, Takashima, Takeshi, d’Uston, Claude, Narasaki, Katsuhiro, Tsurumi, Keisuke, Kaneko, Hiroshi, Nakazawa, Michio, Mori, Kunishiro, Fujii, Masayuki
Format Journal Article
LanguageEnglish
Published Elsevier B.V 21.08.2005
Subjects
Gamma-ray spectroscopy
Germanium detector
Lunar mission
Stirling cryocooler
07.85. - m
Germanium detector
Gamma-ray spectroscopy
Stirling cryocooler
95.55.Pe
Lunar mission
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Summary:The gamma-ray spectrometer (GRS) of Japanese lunar polar orbiter SELENE uses a Ge detector for the first time on a lunar mission. This spectrometer will observe lunar gamma rays for 1 year or more to determine chemical composition over the entire lunar surface. For cooling the Ge detector, we adopted a Stirling cryocooler. The SELENE GRS flight model was completed and an energy resolution of 3.0 keV (FWHM) at 1.33 MeV was achieved. This paper describes the details of the detector-cryogenic system and its performance.
ISSN:0168-9002
1872-9576
DOI:10.1016/j.nima.2005.03.170