Accéléromètre atomique double espèce 87Rb/39K aéroporté pour un test du principe d’équivalence

Abstract : During the last two decades, new techniques to cool and manipulate atoms has enabled the development of inertial sensors based on atom interferometry. The ICE project aims to verify the weak equivalence principle (WEP) using a compact and transportable dual-species atom interferometer. To make precise tests of the WEP, this experiment is performed in a micro-gravity environment during parabolic flights onboard the Novespace zero-g aircraft. The interferometer is composed of two atomic species (87Rb et 39K) with similar transition wavelengths (780 nm and 767 nm), which are derived from frequency-doubled telecom lasers. This ultra-stable laser source is able to withst and the parabolic flight and their rough conditions.In previous work, we have demonstrated measurements from a cold rubidium interferometer during the 1g and 0g phases during flights. Recently, we manage to carry out one of the first gravimeter with 39K in a new titanium vacuum system. This is a huge achievement because this atom is hard to cool down and to manipulate. I will present in this thesis, the results with Rubidium and Potassium on the newset-up, I we will report on recent progress toward a double species 87Rb/39K interferometer.
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Pierre Alain Gominet. Accéléromètre atomique double espèce 87Rb/39K aéroporté pour un test du principe d’équivalence. Physique [physics]. Université de Bordeaux, 2015. Français. ⟨NNT : 2015BORD0011⟩. ⟨tel-01168749⟩

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