Development of submillimeter-wave camera for Atacama submillimeter telescope experiment

被引：7

作者：

Matsuo, H ^{[1
]}

Takeda, M ^{[1
]}

Noguchi, T ^{[1
]}

Ariyoshi, S ^{[1
]}

Akahori, H ^{[1
]}

机构：

[1] Natl Astron Observ, Mitaka, Tokyo 1818588, Japan

来源：

RADIO TELESCOPES | 2000年 / 4015卷

关键词：

submillimeter-wave receivers; LMSA/ALMA; superconducting tunnel junctions; direct detectors; distributed junctions; log-periodic antenna;

D O I：

10.1117/12.390415

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

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) ate 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.

引用

页码：228 / 236

页数：9

共 8 条

[1] Heterojunction field effect transistors (HJFETs) for a readout circuit of a cryogenically cooled far-infrared detector [J].