Karlsruhe 2024 – scientific programme

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T: Fachverband Teilchenphysik

T 8: Neutrino physics 2

T 8.6: Talk

Monday, March 4, 2024, 17:15–17:30, Geb. 30.22: Gaede-HS

Non contact measurement and stabilization of ultra-high temperatures in a hydrogen atom source — •Maximilian Hüneborn and Sebastian Böser for the Project 8 collaboration — Johannes Gutenberg-Universitat Mainz, Mainz, Germany

The Project 8 experiment aims to achieve a 40 meV neutrino mass measurement through the use of atomic tritium, to eliminate rotational and vibrational modes found in molecules, combined with measuring tritium beta decay electrons using cyclotron radiation emission spectroscopy. As a possible starting point, at the Mainz atomic test stand we are currently developing a thermal hydrogen cracker. One major aspect is the on-demand precise temperature control of the filament. This presentation compares the use of a thermocouple and a pyrometer for this purpose. Challenges, including source degradation at temperatures above 2000 K, led to the implementation of a PID loop for accurate temperature maintenance. This advancement not only addresses the issue of source degradation but also enhances the capabilities of the setup, enabling other measurements within the Mainz atomic setup to benefit from the newly acquired stability, precision, and reproducibility.

Keywords: pyrometry; atomic hydrogen; temperature control; PID loop implementation; molecular dissociation