Aachen 2019 – wissenschaftliches Programm

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T: Fachverband Teilchenphysik

T 57: Axionen II

T 57.7: Vortrag

Mittwoch, 27. März 2019, 17:35–17:50, S09

Low Temperature MMC Detector Arrays for the IAXO — •Daniel Unger, Christian Enss, Andreas Fleischmann, Lisa Gamer, Loredana Gastaldo, Daniel Hengstler, Sebastian Kempf, and Dennis Schulz for the iaxo collaboration — Kirchhoff Institute for Physics, Heidelberg University

The International Axion Observatory (IAXO) is searching for axions or axion-like particles generated in the Sun. A large magnetic field is used to convert solar axions to photons via the Primakoff effect. The major part of the expected spectrum considering only axion-photon coupling covers an energy range up to 10 keV with its maximum at about 3 keV. X-ray detectors with high efficiency in this energy range and low intrinsic background are required. Low temperature metallic magnetic calorimeters (MMCs) fulfil these requirements and can reach very low thresholds below 100 eV.

We present the design of a new detector system for the IAXO experiment with the possibility to operate two different kinds of two-dimensional MMC arrays. The setup is designed to host a large MMC array with moderate energy resolution aiming to discover events related to axions. If axions were discovered the focus would move to study the spectral shape. In this case a smaller MMC array featuring a higher energy resolution would replace the initial array using the same setup.

We show the current status of the platform and discuss methods to recognize background events based on pulse shape analysis and event coincidence in several pixels.