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Proceedings Paper

Monolithic Ge: Ga two-dimensional array detector for FIS instrument on ASTRO-F
Author(s): Shuji Matsuura; Yosuke Isozaki; Mai Shirahata; Hidehiro Kaneda; Takao Nakagawa; Michael A. Patrashin; Mikio Fujiwara; Takanori Hirao; Mitsunobu Kawada; Hiroshi Shibai; Toyoki Watabe
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Paper Abstract

ASTRO-F is a Japanese infrared satellite, which is scheduled for launch in early 2004. Far-infrared instrument that will be onboard ASTRO-F, Far-Infrared Surveyor (FIS), will perform the four-color all sky survey in the 50-200 um wavelength range with the diffraction-limited spatial resolution for 67-cm diameter telescope. For short-wave photometric bands of 50-110 um, we have developed a monolithic Ge:Ga two-dimensional array detector with no light cavity. This top-illumination type array design is promising for making future large-format array. The monolithic Ge:Ga is directly attached onto cryogenic readout electronics, capacitive trans-impedance amplifier composed of silicon p-MOSFETs, designed specially for low-temperature use. Results of the detector measurements show that the device works properly and sensitive enough for astronomical applications. Complex behavior of the detector, such as non-linearity of the integration ramp, transient response, non-uniform responsivity in the array, and cross-talk response, which may cause systematic error in the photometry, have been found. But, these effects are ~10% of major part of the signal and correctable with accuracy of a few %.

Paper Details

Date Published: 5 March 2003
PDF: 8 pages
Proc. SPIE 4850, IR Space Telescopes and Instruments, (5 March 2003); doi: 10.1117/12.461485
Show Author Affiliations
Shuji Matsuura, Institute of Space and Astronautical Science (Japan)
Yosuke Isozaki, Institute of Space and Astronautical Science (Japan)
Mai Shirahata, Institute of Space and Astronautical Science (Japan)
Hidehiro Kaneda, Institute of Space and Astronautical Science (Japan)
Takao Nakagawa, Institute of Space and Astronautical Science (Japan)
Michael A. Patrashin, Institute of Space and Astronautical Science (Japan)
Mikio Fujiwara, Communications Research Lab. (Japan)
Takanori Hirao, Nagoya Univ. (Japan)
Mitsunobu Kawada, Nagoya Univ. (Japan)
Hiroshi Shibai, Nagoya Univ. (Japan)
Toyoki Watabe, Nagoya Univ. (Japan)


Published in SPIE Proceedings Vol. 4850:
IR Space Telescopes and Instruments
John C. Mather, Editor(s)

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