SMuK 2023 – wissenschaftliches Programm

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T: Fachverband Teilchenphysik

T 98: Gas-Detecors, Detector Systems

T 98.2: Vortrag

Mittwoch, 22. März 2023, 17:45–18:00, WIL/C207

Development of a GridPix detector for IAXO — •Johanna von Oy, Klaus Desch, Jochen Kaminski, Tobias Schiffer, Sebastian Schmidt, and Markus Gruber — Physikalisches Institut der Universität Bonn

To search for the yet undiscovered particle axion, the helioscope experiment International AXion Observatory (IAXO) and its intermediate experimental stage BabyIAXO have been proposed. In these experiments, axions coming from the sun are converted into X-rays in a magnet utilizing the inverse Primakoff effect.

The then focused X-rays can be detected with a gas-filled GridPix detector. The base of this detector is a pixelated readout chip with a perfectly aligned mash on top that acts as a gas amplificication stage. This allows individual electrons, produced by the X-rays in the gas volume to be detected.

Due to the low probability of axions converting into X-rays thanks to their small interaction strength, the detector background has to be very low. For that purpose, the materials used have to be as radiopure as possible. A first prototype, using the materials in their non-radiopure form has been build and is being tested.

This talk explains the detector in detail and discusses first test results.