Hannover 2020 – scientific programme
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A: Fachverband Atomphysik
A 24: Ultracold atoms, ions, and BEC V (joint session A/Q)
A 24.4: Talk
Thursday, March 12, 2020, 12:00–12:15, f303
A cryogenic Penning trap system for sympathetic laser cooling of atomic ions and protons — •Johannes Mielke1, Teresa Meiners1, Matthias Borchert1,3, Frederik Jacobs1, Julian Pick1, Amado Bautista-Salvador2, Juan Manuel Cornejo1, Ralf Lehnert1,4, Malte Niemann1, Stefan Ulmer3, and Christian Ospelkaus1,2 — 1Institut für Quantenoptik, Leibniz Universität Hannover, Welfengarten 1, 30167 Hannover, Germany — 2Physikalisch-Technische Bundesanstalt, Bundesallee 100, 38116 Braunschweig, Germany — 3Ulmer Fundamental Symmetries Laboratiory, RIKEN, Wako, Saitama 351-0198, Japan — 4Indiana University Center for Spacetime Symmetries, Bloomington, IN 47405, USA
High precision comparisons of the fundamental properties of protons and antiprotons carried out within the BASE collaboration serve as tests of CPT invariance in the baryon sector. However, preparation and measurement schemes based on resistive cooling and image current detection are time-consuming and highly sensitive to the particle’s motional energy. Thus, experimental schemes based on sympathetic cooling of single (anti-)protons through co-trapped atomic ions can contribute to the ongoing strive for improved precision through fast preparation times and low particle temperatures.
Here we present a cryogenic multi-Penning trap system for free space coupling of two single particles in an engineered double-well potential and report on latest results obtained with Doppler cooled 9Be+ ions. Prospects for proton loading and sympathetic cooling in a micro-coupling trap will be discussed.