Dortmund 2021 – scientific programme
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T: Fachverband Teilchenphysik
T 70: Searches for Dark Matter II
T 70.8: Talk
Wednesday, March 17, 2021, 17:45–18:00, Tt
Investigation of dielectric loss (tanδ) of low-loss materials for the axion dark matter search experiment, MADMAX — •Erdem Oez for the MADMAX collaboration — RWTH, Aachen, Germany
In the presence of dark matter axions a dielectric material submerged in a magnetic field emits microwaves. The magnetized disk and mirror axion (MADMAX) experiment plans to use multiple ( ∼ 80) large (∼ 1 mm thick, ∼ 1.25 m diameter) dielectric disks to enhance the microwave signal. In order to further maximize generated signal, low- loss ( tanδ < 10−4) materials such as Sapphire (Al2O3) or Lanthanum Aluminate (LaAlO3) need to be used as disk materials. In this talk we present a very sensitive resonator cavity method, measurements and results for investigation of dielectric properties of these materials.