A new LHe-free cryostat for the heterodyne SIS receiver for the Leighton Chajnantor Telescope

IF 2.2 4区 物理与天体物理 Q2 ASTRONOMY & ASTROPHYSICS
Yao Li, Duo Cao, Yi Zhang, Xiaoyong He, Feng Liu, Wangzhou Shi, Chenggang Shu
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引用次数: 0

Abstract

The Leighton Chajnantor Telescope (LCT) is an international collaborative program among Caltech, Shanghai Normal University (ShNU), and Universidad de Concepción (UdeC), aiming at the refurbishment and relocation of the Caltech Submillimeter Observatory (CSO) telescope from Mauna Kea, Hawaii, to the Chajnantor Plateau, northern Chile. A suite of excellent-sensitivity heterodyne superconductor–insulator–superconductor (SIS) receivers will be deployed to the telescope as the first set of instrumentations for high-resolution spectral observation. However, the current refrigeration technology for this receiver utilizes liquid helium (LHe), which greatly increases the cost of cooling and labor. To address this problem, a new LHe-free cryostat for the LCT heterodyne SIS receiver has been designed, fabricated, and tested. Mechanical and thermal analyses were performed to ensure that the cryostat meets the requirements of the telescope pointing accuracy and the SIS junction working environment, respectively. The experiment testing results are in good agreement with the calculation and analysis, indicating that the proposed LHe-free cryostat meets the operational requirements of the telescope at the new site.
用于莱顿-恰南托尔望远镜外差 SIS 接收器的新型无氦气低温恒温器
莱顿-查南特望远镜(LCT)是加州理工学院、上海师范大学和康塞普西翁大学之间的一项国际合作计划,旨在整修加州理工学院亚毫米波天文台(CSO)望远镜,并将其从夏威夷的莫纳凯亚迁移到智利北部的查南特高原。该望远镜将部署一套灵敏度极高的异频超导体-绝缘体-超导体(SIS)接收器,作为高分辨率光谱观测的第一套仪器。然而,目前这种接收器的制冷技术使用的是液氦(LHe),这大大增加了制冷和人工成本。为解决这一问题,我们设计、制造并测试了一种用于 LCT 外差 SIS 接收器的新型无液氦低温恒温器。为确保低温恒温器分别满足望远镜指向精度和 SIS 结工作环境的要求,对其进行了机械和热分析。实验测试结果与计算和分析结果十分吻合,表明所提出的无氦低温恒温器符合新址望远镜的运行要求。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
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来源期刊
Publications of the Astronomical Society of Japan
Publications of the Astronomical Society of Japan 地学天文-天文与天体物理
CiteScore
4.10
自引率
13.00%
发文量
98
审稿时长
4-8 weeks
期刊介绍: Publications of the Astronomical Society of Japan (PASJ) publishes the results of original research in all aspects of astronomy, astrophysics, and fields closely related to them.
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