# IDM 2018

Jul 22 – 27, 2018
MacMillian
US/Eastern timezone

## MADMAX: A new way to search for QCD Axion Dark Matter with a Dielectric Haloscope

Jul 26, 2018, 4:55 PM
25m
Kassar-Foxboro

#### Kassar-Foxboro

Talk Direct Detection

### Speaker

Stefan Knirck (Max-Planck-Institute for Physics, Munich, Germany)

### Description

Light Dark Matter candidates have increasingly come under the focus of scientific interest. In particular the QCD axion is also able to solve other fundamental problems such as CP-conservation in strong interactions. Galactic axions and axion-like particles can be converted to photons at boundaries between materials of different dielectric constants under a strong magnetic field. Combining many such surfaces, one can enhance this conversion significantly using constructive interference and resonances. The proposed MADMAX setup containing 80 high dielectric disks in a 10 T magnetic field could probe the well-motivated mass range of $40-400 \, \mu {\rm eV}$, a range which is at present inaccessible by existing cavity searches. The experimental idea and the proposed design of MADMAX will be discussed. Among recent R&D results from finite element simulations and proof-of-principle prototype measurements, the prospects of reaching sensitivity to the QCD axion will be presented.

### Primary author

Stefan Knirck (Max-Planck-Institute for Physics, Munich, Germany)