Heidelberg 2022 – wissenschaftliches Programm

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T: Fachverband Teilchenphysik

T 11: Gaseous Detectors

T 11.1: Vortrag

Montag, 21. März 2022, 16:15–16:30, T-H24

Photon Detection by Structured Converter Layers in Micro-Pattern Gaseous Detectors — •Katrin Penski, Otmar Biebel, Stefanie Götz, Vitaliy Havrylenko, Ralf Hertenberger, Christoph Jagfeld, Maximilian Rinnagel, Chrysostomos Valderanis, and Fabian Vogel — LMU München

Micro-Pattern Gaseous Detectors are high-rate capable with excellent spatial and temporal resolution. Developed for the detection of charged particles, the low density in the active gas volume of these detectors exhibit only a poor detection efficiency for electrically neutral particles. For photons the detection via the photoelectric effect can be increased using a solid converter cathode, which is made of high-Z materials. With our novel approach the detection efficiency can be optimized by incorporating several converter plates, which are mounted parallel to the electric drift field in the detector. With an optimized electric field, the created electrons are guided out of the conversion volume. First measurement results are presented and compared to corresponding simulations. This technique allows for higher photon detection efficiencies and more sensitive equipment, which might be applied to modern astrophysics, material research or medical physics.