Dortmund 2021 – scientific programme

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T: Fachverband Teilchenphysik

T 64: Pixel Detectors III

T 64.5: Talk

Wednesday, March 17, 2021, 17:00–17:15, Tn

Development of a Hybrid Pixel Detector Tracker for a Light Dark Matter Experiment at ELSA — Philip Bechtle, Klaus Desch, Markus Gruber, Matthias Hamer, Jochen Kaminski, •Leonie Richarz, and Tobias Schiffer — Physikalisches Institut, Universität Bonn, Nußallee 12, 53115 Bonn

Light Dark Matter Experiments based on dark bremsstrahlung are promising approaches to solve the mystery of unobserved dark matter in our universe. In these experiments an electron beam is shot onto a thin target, where aside from normal bremsstrahlung also possibly dark bremsstrahlung could be observed.

Due to the low signal cross-section in the parameter space where these experiments are typically sensitive, a large number of electrons on target is required. At the same time, for the reconstruction of single electron-target interactions a low number of such interactions per recorded event is advantageous. The electron stretcher accelerator (ELSA) in Bonn could provide both, as a very low number of electrons can be extracted at a high rate. A candidate for reconstructing the tracks of individual electrons in such a setup (and identifying dark bremsstrahlung via the momentum loss) is an ultrafast hybrid pixel detector. As a first step towards such a tracker, a setup using hybrid pixel modules with the Timepix3 ASIC is developed, providing spatial coordinates and timing information at a high readout rate.

In this talk the ongoing preparations of a first testbeam with such a detector will be presented, including elements of the development of the required readout system.