Thermal architecture for the SPIDER flight cryostat
Thermal architecture for the SPIDER flight cryostat
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SPIDER 飞行低温恒温器的热架构
DOI：
10.1117/12.857925
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发表时间：
2010
期刊：
影响因子：
--
通讯作者：
A. Turner
中科院分区：
文献类型：
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作者：
J. Gudmundsson;P. Ade;M. Amiri;S. Benton;R. Bihary;J. Bock;J. Bond;J. A. Bonetti;S. Bryan;B. Burger;H. Chiang;C. Contaldi;B. Crill;O. Doré;M. Farhang;J. Filippini;L. Fissel;N. Gandilo;S. Golwala;M. Halpern;M. Hasselfield;G. Hilton;W. Holmes;V. Hristov;K. Irwin;W. Jones;C. Kuo;C. MacTavish;P. Mason;T. Montroy;T. Morford;C. Netterfield;D. O'Dea;A. Rahlin;C. Reintsema;J. Ruhl;M. Runyan;M. Schenker;J. Shariff;J. Soler;A. Trangsrud;C. Tucker;R. Tucker;A. Turner
我们描述了低温系统的SPIDER，球载微波偏振计，将映射8%的天空度尺度的角分辨率。该系统由一个1284 L液氦低温恒温器和一个16 L毛细管填充的超流氦罐组成，它们分别提供4 K和1.5 K的基本工作温度。闭合循环3He吸附制冷机为多个焦平面提供亚开尔文冷却功率，这些焦平面位于单色望远镜插入物中。主氦罐悬挂在带有热绝缘玻璃纤维弯曲件的真空容器内，并通过两个蒸汽冷却屏蔽和多层绝缘的组合来屏蔽热辐射。该系统允许极低的仪器背景和超过25天的保持时间。包括冷冻剂在内的低温系统的总质量约为1000 kg。这使得传统的长时间气球飞行成为可能。我们将讨论低温系统的设计、热分析和鉴定。
We describe the cryogenic system for SPIDER, a balloon-borne microwave polarimeter that will map 8% of the sky with degree-scale angular resolution. The system consists of a 1284 L liquid helium cryostat and a 16 L capillary-filled superfluid helium tank, which provide base operating temperatures of 4 K and 1.5 K, respectively. Closed-cycle 3He adsorption refrigerators supply sub-Kelvin cooling power to multiple focal planes, which are housed in monochromatic telescope inserts. The main helium tank is suspended inside the vacuum vessel with thermally insulating fiberglass flexures, and shielded from thermal radiation by a combination of two vapor cooled shields and multi-layer insulation. This system allows for an extremely low instrumental background and a hold time in excess of 25 days. The total mass of the cryogenic system, including cryogens, is approximately 1000 kg. This enables conventional long duration balloon flights. We will discuss the design, thermal analysis, and qualification of the cryogenic system.