Erlangen 2022 – wissenschaftliches Programm

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A: Fachverband Atomphysik

A 20: Precision spectroscopy of atoms and ions (joint session A/Q)

A 20.6: Poster

Mittwoch, 16. März 2022, 16:30–18:30, P

Towards Magnetic Trapping of Atomic Hydrogen — •Merten Heppener, Gregor Schwendler, Jan Haack, Hendrik Schürg, and Randolf Pohl — Johannes Gutenberg-Universität Mainz, QUANTUM, Institut für Physik & Exzellenzcluster PRISMA⁺, Mainz, Germany

We are currently setting up an experiment to determine the root mean square triton charge radius via two-photon 1S-2S laser spectroscopy at 243 nm on magnetically trapped tritium atoms [1]. For preparation of trapping, an atomic hydrogen source including a microwave dissociation was set up, followed by a cryogenic nozzle and a magnetic quadrupole guide for velocity selection. In the future, it is planned to load the slow hydrogen atoms into a magnetic minimum trap using a cold lithium buffer gas, for which we will present the planned trap configuration. Parallel, a spectroscopy laser system at 243 nm is being developed. The available laser power for exciting the 1S-2S two-photon transition is increased in a stabilized enhancement cavity. The population of the hydrogen 2S state can be monitored by detecting quenched Lyman-α photons using micro-channel plate-based system. In the next stage, we will test our laser system on an atomic hydrogen sample.

[1] S. Schmidt et al. J. Phys. Conf. Ser. 1138, 012010 (2018)