Astronomy and Astrophysics – Astronomy
Scientific paper
Dec 1989
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1989spie.1157..338y&link_type=abstract
IN: Infrared technology XV; Proceedings of the Meeting, San Diego, CA, Aug. 7-9, 1989 (A90-44129 19-35). Bellingham, WA, Society
Astronomy and Astrophysics
Astronomy
5
Indium Antimonides, Infrared Detectors, Arrays, Cryogenic Temperature, Jfet
Scientific paper
A JFET amplified InSb infrared detector array for astronomical observation in space has been developed that can be operated at liquid helium temperature. This detector array utilizes 24-channel InSb photodiodes, 1 x 0.5 mm per element, having low junction capacitance for noise reduction. The amplifier circuit is designed as a hybrid IC having a 24-channel charge integration amplifier array. Since this JFET amplifier circuit cannot function at liquid helium temperature, it is suspended from the frame employing aramid wires and heated to approximately 70 K by a built-in heater. It is shown that the detector array attains readout noise of about 100 e and that this noise level is low enough for use in space astronomical observation.
Fujisada Hiroyuki
Matsumoto Toshio
Murakami Hitoshi
Yamamoto Kaichi
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