Atom interferometry in space: Thermal management and magnetic shielding

作者：Milke Alexander; Kubelka Lange Andre; Guerlebeck Norman; Rievers Benny; Herrmann Sven; Schuldt Thilo; Braxmaier Claus

来源：Review of Scientific Instruments, 2014, 85(8): 083105.

DOI：10.1063/1.4890560

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 x 10(-4) % due to thermal expansion although they consume an average power of 22W. Also Earth%26apos;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.

• 出版日期2014-8