Erlangen 2018 – scientific programme

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Q: Fachverband Quantenoptik und Photonik

Q 12: Quantum Optics II

Q 12.6: Talk

Monday, March 5, 2018, 15:15–15:30, K 0.016

The 1 m prototype for the ’Any Light particle Search’ experiment — •Kanioar Karan, Dennis Schmelzer, Li-Wei Wei, and Benno Willke — Max-Planck-Institut für Gravitationsphysik (Albert-Einstein-Institut), Callinstraße 38, 30167 Hannover

Extensions of the Standard Model of particle physics predict a variety of new particles, among them so-called WISPs, or very Weakly Interacting Sub-eV Particles. The most famous WISP candidate is the axion.

The ALPS collaboration is setting up a light shining through a wall experiment (LSW) for production and detection of WISPs. This experiment is based on the simple idea that a high power laser field that traveled through a static magnetic field can partly oscillate into an axion filed. The axion field then cross an opaque wall to a second static magnetic field and re-oscillate into an electromagnetic field. On both sides of the wall optical cavities are used to increase the laser field for the WISPs production and the likelihood for the re-oscillation of the WISPs into electromagnetic fields.

A key challenge in the experiment is to achieve a spatial overlap of 95% of the two optical cavities. Therefore, the parallelism of the cavity mirrors has to be ≤ 5µrad. With the 1m prototype table-top experiment the ALPS collaboration will show with a breadboard concept how to achieve a parallelism of 5µrad and the required spatial overlap of 95%. We will report on the status of this 1m-prototype experiment.