Atom interferometry in space: thermal management and magnetic shielding.
Atom interferometry in space: thermal management and magnetic shielding.
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DOI：
10.1063/1.4890560
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发表时间：
2014-02
期刊：
影响因子：
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通讯作者：
A. Milke;A. Kubelka-Lange;N. Gürlebeck;B. Rievers;S. Herrmann;T. Schuldt;C. Braxmaier
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文献类型：
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作者：
A. Milke;A. Kubelka-Lange;N. Gürlebeck;B. Rievers;S. Herrmann;T. Schuldt;C. Braxmaier
原子干涉测量法是一种令人兴奋的探索基础物理的工具。人们认为用两种不同种类的原子来检验自由落体的普遍性是特别容易的。这种实验对灵敏度的要求越来越高，对实验环境、仪器控制和系统效果都提出了严格的要求。这可以通过进入太空来部分缓解，例如，在时空探索者和量子等效原理空间测试（STE-QUEST）任务中。然而，对仪器的要求仍然非常具有挑战性。例如，STE-QUEST任务的规格意味着原子干涉仪的费希巴赫线圈由于热膨胀只能改变其半径约260 nm或2.6 × 10(-4) %，尽管它们消耗的平均功率为22 W。此外，地球磁场必须被抑制10(5)倍。我们在这篇文章中表明，通过正确的设计，这样的热和磁要求确实可以满足，并且这些都不是原子干涉仪在太空中令人兴奋的物理可能的障碍。
Atom interferometry is an exciting tool to probe fundamental physics. It is considered especially apt to test the universality of free fall by using two different sorts of atoms. The increasing sensitivity required for this kind of experiment sets severe requirements on its environments, instrument control, and systematic effects. This can partially be mitigated by going to space as was proposed, for example, in the Spacetime Explorer and Quantum Equivalence Principle Space Test (STE-QUEST) mission. However, the requirements on the instrument are still very challenging. For example, the specifications of the STE-QUEST mission imply that the Feshbach coils of the atom interferometer are allowed to change their radius only by about 260 nm or 2.6 × 10(-4) % due to thermal expansion although they consume an average power of 22 W. Also Earth's magnetic field has to be suppressed by a factor of 10(5). We show in this article that with the right design such thermal and magnetic requirements can indeed be met and that these are not an impediment for the exciting physics possible with atom interferometers in space.