SMuK 2023 – wissenschaftliches Programm

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T: Fachverband Teilchenphysik

T 37: Neutrinos, Dark Matter IV

T 37.6: Vortrag

Dienstag, 21. März 2023, 18:15–18:30, POT/0251

Precise Temperature Characterization of an Atomic Hydrogen Source — •Brunilda Muçogllava and Martin Fertl for the Project 8 collaboration — Johannes Gutenberg Universität Mainz

In order to achieve a neutrino mass sensitivity of 40 meV, Project 8 aims to use the Cyclotron Radiation Emission Spectroscopy technique to analyze the tritium beta decay spectrum. To that end, a tritium atomic beam must be constructed and employed. Due to tritium's radioactive nature, initial measurements have been carried out using a Hydrogen Atom Beam Source (HABS) at the Mainz atomic test stand. The HABS produces hydrogen atoms via a 1 mm diameter tungsten capillary radiatively heated to ~ 2300 K by a filament. Precise capillary temperature measurements with low uncertainty at this high temperature are required for accurate characterization of the source. This is particularly important to understand the dissociation efficiency from molecular into atomic hydrogen, the key performance parameter for the atomic source. In this talk, the results of several temperature measuring devices will be discussed: a thermocouple inside the HABS, an optical spectrometer operated from outside the vacuum system, and a camera looking into the interior of the capillary.