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A: Fachverband Atomphysik

A 35: Precision Spectroscopy of atoms and ions

A 35.18: Poster

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

A proton source for precision experiments in the QLEDS project — •Nicolas Pulido¹, Johannes Mielke¹, Teresa Meiners¹, Malte Niemann¹, Juan M. Cornejo¹, Matthias Borchert^{1, 3}, Jonathan Morgner^{1, 2}, Amado Bautista^{1, 2}, Stefan Ulmer³, and Christian Ospelkaus^{1, 2} — ¹Institut für Quantenoptik, Leibniz Universität Hannover — ²Physikalisch-Technische Bundesanstalt, Braunschweig — ³Ulmer Fundamental Symmetries Laboratory, RIKEN

Penning traps are an essential tool for high precision measurements on the g-factor of protons and antiprotons to perform tests of the CPT theorem [1]. This is the goal pursued by the BASE collaboration. Here we discuss techniques for sympathetic laser cooling and detection to support these tests [2,3]. We present the design of an off-axis proton source that also allows the introduction of an on-axis antiproton beam in the Penning trap system within the BASE collaboration. The source, consisting of an electron gun and a storage trap, will be commissioned in a cryogenic test setup.

The test setup is composed of a 2-stage cryocooler and a Penning trap with permanent magnets. We discuss different methods of non-destructive ion detection for the test setup.

[1] C. Smorra et al., Nature 550, 371-374 (2017)

[2] C. Smorra et al., EPJ-ST 224, 3055 (2015)

[3] D. J. Wineland et al., J. Res. NIST 103, 259-328 (1998)