München 2019 – wissenschaftliches Programm
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HK: Fachverband Physik der Hadronen und Kerne
HK 13: Fundamental Symmetries I
HK 13.5: Vortrag
Montag, 18. März 2019, 18:15–18:30, HS 16
Towards Sympathetic Cooling of Single Protons and Antiprotons — •Markus Wiesinger1,2, Matthew Bohman1,2, Georg Schneider3, Christian Smorra2, Andreas Mooser1,2, Pascal Blessing2,4, Jack Devlin2,5, James Harrington1,2, Elise Wursten2,5, Klaus Blaum1, Yasuyuki Matsuda6, Wolfgang Quint5, Jochen Walz3, and Stefan Ulmer2 — 1Max-Planck-Institut für Kernphysik, Germany — 2Ulmer Fundamental Symmetries Laboratory, RIKEN, Japan — 3Johannes Gutenberg-Universität Mainz, Germany — 4GSI, Germany — 5CERN, Switzerland — 6University of Tokyo, Japan
We, the BASE collaboration, perform most precise tests of the CPT symmetry in the baryon sector by measurement of the proton and antiproton magnetic moment and the proton-to-antiproton charge-to-mas ratio.
Our latest high-precision measurement of the proton magnetic moment at the proton g-factor experiment in Mainz is limited by statistics. The reason is that the current use of sub-thermal cooling of a single proton by a resistive method - an extremely time-consuming technique - leads to cycle times of hours.
To overcome this limitation sympathetic cooling by laser-cooled Be+ ions is planned in a common-end-cap Penning trap: The method not only promises to produce protons or antiprotons with mK temperatures within tens of seconds but also achieves separation of the cooled ion and the refrigerator ion - a feature distinct from other ongoing efforts to sympathetically cool antiprotons.
We present the current setup of the proton g-factor experiment and report on the status of our laser cooling experiments.