Bonn 2020 – wissenschaftliches Programm
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T: Fachverband Teilchenphysik
T 77: Axion like particles II
T 77.7: Vortrag
Donnerstag, 2. April 2020, 18:05–18:20, H-HS XV
Preliminary results of a GridPix based IAXO prototype detector — •Sebastian Schmidt, Klaus Desch, Jochen Kaminski, Tobias Schiffer, and Johanna von Oy — Physikalisches Institut der Universität Bonn
The International AXion Observatory (IAXO) is a next generation axion helioscope aiming for an order of magnitude improvement on the axion photon coupling gaγ over the current best results by the CERN Axion Solar Telescope (CAST). Such helioscopes utilize the inverse Primakoff effect to reconvert solar axions (and potential other ALPs) into X-rays in their respective magnetic fields.
A gaseous detector based on 7 GridPixes, a combination of a 256 × 256 pixel Timepix ASIC and an integrated MicroMegas stage on top, together with veto scintillators and an FADC, were deployed at CAST in 2017/18 to develop an ultra low background detector for IAXO.
This talk will present preliminary results of the data taking campaign from 2017/18 and compare it with the current best limit on the axion electron coupling gae. The focus will be the improvements given by each of the detector features and the importance of ray tracing the axion / X-ray paths from the Sun to the detector.