You have requested a machine translation of selected content from our databases. This functionality is provided solely for your convenience and is in no way intended to replace human translation. Neither SPIE nor the owners and publishers of the content make, and they explicitly disclaim, any express or implied representations or warranties of any kind, including, without limitation, representations and warranties as to the functionality of the translation feature or the accuracy or completeness of the translations.
Translations are not retained in our system. Your use of this feature and the translations is subject to all use restrictions contained in the Terms and Conditions of Use of the SPIE website.
3 July 2000Development of a submillimeter-wave camera for the Atacama Submillimeter Telescope Experiment
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.
The alert did not successfully save. Please try again later.
Hiroshi Matsuo, Masanori Takeda, Takashi Noguchi, Seiichiro Ariyoshi, 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