Heidelberg 2022 – wissenschaftliches Programm

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T: Fachverband Teilchenphysik

T 11: Gaseous Detectors

T 11.4: Vortrag

Montag, 21. März 2022, 17:00–17:15, T-H24

Research and Development of an Electret based Gasseous Detector — •Vitalii Havrylenko, Otmar Biebel, Stefanie Götz, Ralf Hertenberger, Christoph Jagfeld, Katrin Penski, Maximilian Rinnagel, Chrysostomos Valderanis, and Fabian Vogel — LMU, München

Gaseous Electron Multiplier (GEM) detectors require a high electric field for the signal amplification. In order to simplify the operation of such a detector system, e.g. for use on X-ray astronomy satellites the GEM foil will be replaced by an electret GEM foil. An electret is a material that conserves an internal polarisation, thus creating an electrostatic potential on a long time scale. This detector does not need an external HV supply. Results of different techniques of electret production are presented. Different bipolar epoxies were hardened in strong electric fields yielding a static polarization which can be observed by the induced voltage. Furthermore, Teflon is charged via corona-discharges. The voltage dependence on time is measured for all electret samples and compared. Potential up to 1000 V stable over multiple days are reported.