Author/Authors :
Kobayashi، نويسنده , , Masanori and Hasebe، نويسنده , , Nobuyuki and Hiramoto، نويسنده , , Takuji and Miyachi، نويسنده , , Takashi and Murasawa، نويسنده , , Satoshi and Okada، نويسنده , , Hiroyuki and Okudaira، نويسنده , , Osamu and Yamashita، نويسنده , , Naoyuki and Berezhnoy، نويسنده , , Alexey A. and Shibamura، نويسنده , , Eido and Takashima، نويسنده , , Takeshi and d’Uston، نويسنده , , Claude and Narasaki، نويسنده , , Katsuhiro and Tsurumi، نويسنده , , Keisuke and Kaneko، نويسنده , , Hiroshi and Nakazawa، نويسنده , , Michio and Mori، نويسنده , , Kunishiro and Fujii، نويسنده , , Masayuki، نويسنده ,
Abstract :
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.
Keywords :
Germanium detector , Stirling cryocooler , Lunar mission , Gamma-ray spectroscopy
