PoS - Proceedings of Science
Volume 390 - 40th International Conference on High Energy physics (ICHEP2020) - Parallel: Dark Matter Detection
MADMAX: A Dielectric Haloscope Experiment
X. Li* on behalf of the MADMAX Collaboration
*corresponding author
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Pre-published on: February 09, 2021
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Axions emerge naturally from the Peccei-Quinn (PQ) mechanism which addresses the absence of CP violation in QCD; the axions produced through the "vacuum realignment mechanism" are also a good cold dark matter (CDM) candidate. If PQ symmetry breaking had occurred after inflation, the axion mass is likely to fall in the range of $26 ~\mu$eV to $1$ meV, which is yet to be explored experimentally.

We present a novel dielectric haloscope experiment dedicated to the direct detection of the axions that constitute the local galactic dark matter halo in the mass range of 40 to 400 $\mu$eV — the MAgnetized Disc and Mirror Axion eXperiment (MADMAX). Multiple dielectric discs and a metal mirror are placed in a strong magnetic field to utilize the axion-induced coherent electromagnetic waves emitted from each disc surface and their resonances within the discs-mirror system, such that the axion-induced signal can be boosted to a level detectable by state-of-the-art low noise amplifiers. The design and sensitivity of MADMAX, ongoing R&D activities and the project roadmap are presented.
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