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Proceedings Paper

Development of a submillimeter-wave camera for the Atacama Submillimeter Telescope Experiment
Author(s): Hiroshi Matsuo; Masanori Takeda; Takashi Noguchi; Seiichiro Ariyoshi; Hiromichi Akahori
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Paper Abstract

The Atacama Submillimeter Telescope Experiment (ASTE) is a Japanese development program for the large millimeter and submillimeter array (LMSA/ALMA). The new 10-m submillimeter- wave telescope is a prototype telescope for the LMSA project and to be installed in Chile in 2001. The telescope will be equipped with submillimeter-wave SIS mixer receivers and a submillimeter-wave direct detector camera. The submillimeter- wave camera based on superconducting direct detectors (SIS photon detectors) are under development to realize very wide field observations in submillimeter-wave. Niobium tunnel junctions with low leakage current coupled to antenna structures can be sensitive submillimeter-wave detectors when high quantum efficiency and low leakage current is realized. Inhomogeneous distributed junctions coupled to log-periodic antennas can be used to realize this. Input coupling of more than 50% is calculated using 5-element and 10-element inhomogeneous distributed junctions. With leakage current of less than 100 pA, noise equivalent power can be less than 10-16 W/Hz0.5 under shot noise limited operation. Submillimeter-wave camera of 100 pixels is now under design and will be installed on ASTE 10-m telescope in 2002 or later.

Paper Details

Date Published: 3 July 2000
PDF: 9 pages
Proc. SPIE 4015, Radio Telescopes, (3 July 2000); doi: 10.1117/12.390415
Show Author Affiliations
Hiroshi Matsuo, National Astronomical Observatory (Japan)
Masanori Takeda, Nobeyama Radio Observatory (Japan)
Takashi Noguchi, Nobeyama Radio Observatory (Japan)
Seiichiro Ariyoshi, Tohoku Univ. (Japan)
Hiromichi Akahori, Shinshu Univ. (Japan)

Published in SPIE Proceedings Vol. 4015:
Radio Telescopes
Harvey R. Butcher, Editor(s)

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