Advances in Searching for Galactic Axions with a Dielectric Haloscope (MADMAX)

Abstract

Axions are hypothetical particles that could explain the observed dark matter density and, simultaneously, could naturally resolve the strong charge parity (CP) problem in quantum chromodynamics (QCD). Recent theoretical works indicate that axions are expected to have masses in the range of , a range that presently still evades experimental detection. An experimental design is presented to search for QCD axions in this mass range via the magnetized disk and mirror axion experiment (MADMAX). MADMAX will be composed of multiple movable dielectric disks and a stable mirror that are placed inside a strong magnetic field to utilize the axion‐induced coherent electromagnetic wave emissions from each disk surface. In this paper, new R&D milestones achieved will be reported, that is, the updated magnet quench protection system, a closed booster dielectric haloscope system tested in the MORPURGO magnet at (European Organization for Nuclear Research) CERN using a full experimental data acquisition chain. These new main novel accomplishments investigate the feasibility of the experiment.

The mysterious diffuse UV radiation and axion quark nugget dark matter model

“…In particular, it will allow to 8 The emitted axions in the AQN framework will have relativistic velocities va ≈ 0.6c. Therefore, one should use a truly broadband instruments such as ABRACADABRA [50], LC Circuit [51], DM Radio [52], MADMAX (Magnetized Disc and Mirror Axion Experiment) [53], to detect the AQN-induced signal, see also the recent reviews [54][55][56][57][58] with mentioning existing and planning instruments which are capable to work in a broadband mode.…”