High-precision measurements of thermal expansion at cryogenic temperature on stable materials
High-precision measurements of thermal expansion at cryogenic temperature on stable materials
复制标题
稳定材料低温热膨胀的高精度测量
DOI：
10.7795/810.20130822t
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发表时间：
2011
期刊：
影响因子：
--
通讯作者：
S. Heltzel
中科院分区：
文献类型：
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作者：
S. Roose;S. Heltzel
欧洲航天局（ESA）致力于利用在低温下运行的大口径太空红外望远镜探索宇宙。赫歇尔太空望远镜目前正在拉格朗日L2点轨道上进行首次科学观测并返回数据，而预期的斯皮策太空红外天文台目前正在研究中。主镜的大直径以及在低温下的运行要求使用超稳定材料，并要求结构的尺寸变化随温度的变化特性明确。尺寸稳定性以及热膨胀的准确数据对于詹姆斯·韦伯太空望远镜（JWST）上的低温光谱仪MIRI和NIRspec、高精度激光干涉仪LISA以及被送往炎热环境（如贝皮科伦坡号和太阳轨道飞行器）的航天器也很重要。
The European Space Agency (ESA) aspires the exploration of the universe using space-borne infrared telescopes with large aperture operating at cryogenic temperature. The Herschel space telescope is currently returning its first scientific observations orbiting from the Lagrange point L2 and the foreseen infrared observatory Spica is currently under study. The large diameter of the primary mirrors and the operation at cryogenic temperature require the use of ultra-stable materials and wellcharacterised dimensional change of the structure as function of temperature. Dimensional stability and accurate data on the thermal expansion is also relevant for the cryogenic spectographs MIRI and NIRspec on the James Webb Space Telescope JWST, for the high-precision laser interferometer LISA and for spacecraft sent to a hot environment such as BepiColombo and Solar Orbiter.