Development of Submillimeter-wave Camera using SIS Photon Detectors

使用 SIS 光子探测器开发亚毫米波相机

• 批准号: 13304015
• 负责人: MATSUO Hiroshi
• 金额: $ 15.89万
• 依托单位: National Astronomical Observatory
• 依托单位国家: 日本
• 项目类别: Grant-in-Aid for Scientific Research (A)
• 财政年份: 2001
• 资助国家: 日本
• 起止时间: 2001 至 2003
• 项目状态: 已结题
• 来源: https://kaken.nii.ac.jp/grant/KAKENHI-PROJECT-13304015/
• 关键词: Submillimeter-wave astronomy; Terahertz frequencies; Continuum observations; Direct detectors; Superconducting Niobium; Bolometers; Two dimensional array; Cryogenics; データ解析; サブミリ波; 天文学; 超伝導体; トンネル接合; 検出器; 極低温技術; 電流ノイズ

Development of submillimeter-wave SIS photon detector is performed using superconducting niobium junctions to realize wide-field and wide-bandwidth observations in submillimeter-wave. We have also made 3-color bolometer system operating at 350,650 and 850 GHz to start submilllimeter-wave continuum observations with ASTE (Atacama Submillimeter Telescope Experiment) submillimeter telescope.In the first year of development, we have successfully fabricated low leakage, less than 10 pA, tunnel junction with 1kA/cm2 current density by optimizing the fabrication conditions. In the next year we have observed submillimeter-wave response at 440 GHz and 650 GHz using 4 micron and 3 micron diameter junctions, respectively. In the last year, we have evaluated the detector performance, such as leakage current, current noise, voltage responsivity, quantum efficiency, linearity, time constant and beam pattern with optics. NEP shows 10(-16)W/sqrt(Hz). The measured performance is superior to submillimeter-wave bolometers. The fabrication yield is improve to be 98% for single junctions and 78% for detector elements.The 3-color bolometer system is developed to make early continuum observations with ASTE telescope and to evaluate the antenna performance. Cryostat for 0.3 K operations is developed to realize remotely operable low vibration cryogenics. We have started scientific observing runs with the bolometric receivers.

为了实现亚毫米波宽视场、宽带宽观测，研制了亚毫米波超导铌结SIS光子探测器。我们还制作了工作在350、650和850 GHz的三色测辐射热计系统，并利用ASTE（Atacama Submillimeter Telescope Experiment）亚毫米波望远镜进行了亚毫米波连续谱观测。在接下来的一年中，我们已经观察到亚毫米波响应在440 GHz和650 GHz，分别使用4微米和3微米直径的结。在过去的一年里，我们评估了探测器的性能，如漏电流，电流噪声，电压响应度，量子效率，线性度，时间常数和光束模式与光学。NEP显示10（-16）W/sqrt（Hz）。测量性能优于亚毫米波测辐射热计的上级。单结的成品率提高到98%，探测器元件的成品率提高到78%。研制了三色测辐射热计系统，用于ASTE望远镜的早期连续观测和天线性能评估。为实现远距离操作的低振动低温，研制了0.3K低温恒温器.我们已经开始用测热接收器进行科学观测。

项目成果

Ariyoshi, Matsuo et al.: "Fabrication of superconducting direct detectors in submillimeter-wave bands"RIKEN Riview. 47. 43-47 (2002)

Ariyoshi、Matsuo 等人：“亚毫米波段超导直接探测器的制造”RIKEN Riview。

Matsushita, Matsuo: "FTS Measurements of Submillimeter-Wave Atmospheric Opacity at Pampa la Bola : III. Water Vapor, Liquid Water, and 183GHz Water Vapor Line Opacities"Publ.Astron.Soc.of Japan. 55. 325-333 (2003)

Matsushita, Matsuo：“Pampa la Bola 亚毫米波大气不透明度的 FTS 测量：III. 水蒸气、液态水和 183GHz 水蒸气线不透明度”Publ.Astron.Soc.of Japan。

Akabane, Matsuo et al.: "2 Millimeter Dust around NGC 7538-IRS 1, 2 and 3. I. Inifilled Structure of Dust Cloud"Publ.Astron.Soc.of Japan. 53. 821-832 (2001)

Akabane、Matsuo 等人：“NGC 7538-IRS 1、2 和 3 周围的 2 毫米尘埃。I. 尘埃云的初始结构”Publ.Astron.Soc.of Japan。

Ariyoshi, Matuo et al.: "Nb-based Superconducting Tunnel Junctions as Submillimeter-Wave Direct Detectors"IEEE Trans.Applied Supercond.. 13. 1128-1131 (2003)

Ariyoshi, Matuo 等人：“基于铌的超导隧道结作为亚毫米波直接探测器”IEEE Trans.Applied Supercond.. 13. 1128-1131 (2003)

Akabane, Matsuo et al.: "2 Millimeter Dust around NGC7538-IRS 1,2 and 3.I. Unfilled Structure of Dust Cloud"Publ.Astron.Soc.of Japan. 53. 821-832 (2001)

Akabane、Matsuo 等人：“NGC7538-IRS 1,2 和 3.I 周围的 2 毫米尘埃。尘云的未填充结构”Publ.Astron.Soc.of Japan。