Aachen 2019 – wissenschaftliches Programm
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T: Fachverband Teilchenphysik
T 57: Axionen II
T 57.4: Vortrag
Mittwoch, 27. März 2019, 16:50–17:05, S09
MADMAX - Towards a Dielectric Axion Haloscope — •Christoph Krieger for the MADMAX collaboration — Universität Hamburg, Institut für Experimentalphysik, Luruper Chaussee 149, 22761 Hamburg
The axion, a low-mass particle arising from an elegant solution to the strong CP problem, is a viable and natural candidate for (cold) dark matter. Its major coupling to ordinary matter is realized as a coupling to two photons allowing for axion photon conversion inside strong electromagnetic fields. Due to a linear relation between the axion mass and its coupling, for low axion masses, detection becomes non-trivial.
Especially, the range of 40 to 400 µeV, favored in one of the well motivated scenarios, cannot be accessed with the standard haloscope approach. Therefore, for the MAgentized Disc and Mirror Axion eXperiment the dielectric haloscope approach will be used, utilizing the axion photon conversion at dielectric surfaces in a strong magnetic field. By combining many surfaces, the conversion can be boosted significantly using constructive interference and resonances.
For MADMAX a booster consisting of 80 dielectric discs with 1 m2 size inside a magnetic field in the order of 10 T are envisioned. The relative positions of these discs has to be adjustable in the range of a few to tens of millimeter with micrometer precision.
In this presentation, developments and first results towards a (technical) prototype, including production of tiled large area discs and characterization measurements, will be shown along prospects for the final experiment to be build at DESY in Hamburg.