Development of a submillimeter-wave camera for the Atacama Submillimeter Telescope Experiment

Hiroshi Matsuo; Masanori Takeda; Takashi Noguchi; Seiichiro Ariyoshi; Hiromichi Akahori

doi:10.1117/12.390415

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3 July 2000 Development of a submillimeter-wave camera for the Atacama Submillimeter Telescope Experiment

Hiroshi Matsuo, Masanori Takeda, Takashi Noguchi, Seiichiro Ariyoshi, Hiromichi Akahori

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Proceedings Volume 4015, Radio Telescopes; (2000) https://doi.org/10.1117/12.390415
Event: Astronomical Telescopes and Instrumentation, 2000, Munich, Germany

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/Hz^0.5 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.

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Hiroshi Matsuo, Masanori Takeda, Takashi Noguchi, Seiichiro Ariyoshi, and Hiromichi Akahori "Development of a submillimeter-wave camera for the Atacama Submillimeter Telescope Experiment", Proc. SPIE 4015, Radio Telescopes, (3 July 2000); https://doi.org/10.1117/12.390415

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