Bonn 2020 – scientific programme

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T: Fachverband Teilchenphysik

T 54: Axion like particles I

T 54.2: Talk

Wednesday, April 1, 2020, 16:45–17:00, H-HS XV

Development of components for the MADMAX prototype booster system — •Christoph Krieger for the MADMAX collaboration — Universität 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. 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.

To prototype the MADMAX booster system a small booster with twenty dielectric discs of 300 mm diameter is foreseen which 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, possibly, operated at CERN in 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 drive system.