Heidelberg 2022 – wissenschaftliches Programm

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T: Fachverband Teilchenphysik

T 105: Search for Dark Matter 6

T 105.8: Vortrag

Donnerstag, 24. März 2022, 18:00–18:15, T-H37

MADMAX: Dealing with Motor Failures — •David Leppla-Weber for the MADMAX collaboration — Institut für Experimentalphysik, Universität Hamburg, Luruper Chaussee 149, 22761 Hamburg

The MAgnetized Disk and Mirror Axion eXperiment is a dielectric haloscope aiming to detect axions from the galactic halo by resonant conversion to photons in a strong magnetic field. It uses a stack of dielectric disks, called booster, that amplifies the axion-photon conversion probability over a significant mass range dependent on the position of the adjustable disks. In the planned prototype, depending on the axion mass, amplifications of a factor of ∼ 10⁴ can be achieved. The booster is positioned in a cryostat to achieve the low noise levels necessary for the detection of the tiny power stemming from the axion-photon conversion. In case a repair is needed, the cryostat has to be warmed up and cooled down again resulting in significant shutdown time of the experiment. To explore the case where one disk motor of the MADMAX prototype fails, an investigation for the maximum possible scan range with one disk stuck is presented. It is found that one stuck disk reduces the amplification by no more than 25 % over a range of 1.5 GHz. This enables the experiment to continue operating for a significant amount of time without having to interrupt the axion search and warm up the booster for repairs.