SMuK 2023 – scientific programme

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T: Fachverband Teilchenphysik

T 150: Gas-Detecors, Pixel/TANGERINE

T 150.3: Talk

Thursday, March 23, 2023, 18:00–18:15, WIL/C207

Measurement of the first Townsend coefficient using UV light — •Paolina Noll, Thomas Radermacher, Stefan Roth, David Smyczek, and Nick Thamm — RWTH Aachen University - Physics Institute III B, Aachen, Germany

In gaseous ionization detectors primary electrons are accelerated in high electric fields and hence generate secondary ion pairs. These electron avalanches are described by the first Townsend coefficient which is the number of electrons produced per unit path length per primary electron. In a test setup a UV LED produces primary electrons via the photoelectric effect. The Townsend coefficient is extracted from the anode current measured in relation to the voltage applied. The experimental setup and first results are presented.