Rostock 2019 – scientific programme

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A: Fachverband Atomphysik

A 35: Precision Spectroscopy of atoms and ions

A 35.19: Poster

Thursday, March 14, 2019, 16:15–18:15, S Fobau Physik

Cold Atomic Hydrogen Source @ T-Rex — •Jan Haack, Merten Heppener, Stefan Schmidt, Henrik-Lukas Schumacher, Marcel Willig, Andreas Wieltsch, and Randolf Pohl — Johannes Gutenberg-Univertität Mainz, QUANTUM, Institut für Physik, Exzellenzcluster PRISMA⁺

The Triton-Radius Experiment T-Rex at JGU Mainz aims at a first measurement of the 1S-2S transition in atomic tritium [1]. Such a measurement has the potential to improve the charge radius of the triton nucleus by a factor of 400, with an experimental accuracy of only 1 kHz. This is 100x less precise than the current measurements of the 1S-2S transition in H and D, [2,3]. T-Rex will use a cryogenic hydrogen (later tritium) beam and select low atomic velocities by a magnetic quadrupole guide. The slowest atoms will then be stopped using a Li MOT as a cold buffer gas, and trapped in a magnetic minimum trap. We will present the state of the experiment as well as an outlook.
[1] S. Schmidt et al. J. Phys. Conf. Ser. accepted (2018), arXiv 1808.07240
[2] C. Parthey et al. Phys. Rev. Lett. 104 233001 (2010)
[3] C. Parthey et al. Phys. Rev. Lett. 107 203001 (2011)