Dortmund 2021 – scientific programme

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T: Fachverband Teilchenphysik

T 70: Searches for Dark Matter II

T 70.6: Talk

Wednesday, March 17, 2021, 17:15–17:30, Tt

The MADMAX prototype booster system — •Christoph Krieger for the MADMAX collaboration — Institut für Experimentalphysik, Universität Hamburg, Luruper Chaussee 149, 22761 Hamburg, Deutschland

The axion is a viable and natural candidate for (cold) dark matter. The theoretically favored mass range for the discovery of axions, 40 to 400 µeV, can be ivestigated using a dielectric haloscope. The MAgentized Disc and Mirror Axion eXperiment is based on this approach, 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.

To prototype the MADMAX booster system, a small booster with twenty dielectric discs of 300 mm diameter is foreseen. These discs have to be (re-)positioned in situ with micrometer precision inside a large magnetic field and a cryogenic environment. The prototype system will be commissioned in a dedicated cryostat at the University of Hamburg and later operated at CERN inside the MORPURGO magnet for a first axion search with a dielectric haloscope.

In this presentation, the concept of the MADMAX prototype and especially the development of the booster will be presented, showing the recent status of the production of tiled discs as well as studies on the first prototype of the drive system.