Development of submillimeter-wave camera for atacama submillimeter telescope experiment

被引：10

作者：

Matsuo, H ^{[1
]}

Ariyoshi, S

Akahori, H

Takeda, M

Noguchi, T

机构：

[1] Natl Astron Observ, Ctr Adv Technol, Tokyo 1818588, Japan

[2] Tohoku Univ, Astron Inst, Sendai, Miyagi 9808578, Japan

[3] Shinshu Univ, Fac Sci, Nagano 3908621, Japan

[4] Natl Astron Observ, Nobeyama Radio Observ, Minamisa Ku, Nagano 3841305, Japan

来源：

IEEE TRANSACTIONS ON APPLIED SUPERCONDUCTIVITY | 2001年 / 11卷 / 01期

关键词：

focal plane array; niobium tunnel junctions; submillimeter-wave; superconducting direct detectors;

D O I：

10.1109/77.919438

中图分类号：

TM [电工技术]; TN [电子技术、通信技术];

学科分类号：

0808 ; 0809 ;

摘要：

Submillimeter-wave focal plane arrays based on superconducting direct detectors are designed to be used on a new 10-m submillimeter-wave telescope in Chile. Niobium tunnel junctions with low leakage current coupled to antenna structures can be sensitive submillimeter- wave direct detectors when high quantum efficiency and low leakage current are realized. Inhomogeneous distributed junctions coupled to log-periodic antennas can be used to realize this. Input coupling of better than 50% is calculated with a bandwidth of more than 60 GHz using low current density inhomogeneous distributed junctions. Their measured leakage current of 5 pA and their shot-noise limited operation suggests that noise equivalent power of less than 10(-17)W/Hz(0.5) at operating temperature of 0.9 K could be achieved.

引用

页码：688 / 691

页数：4

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