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Rostock 2019 – scientific programme

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A: Fachverband Atomphysik

A 9: Precision Spectroscopy of atoms and ions III (joint session A/Q)

A 9.3: Talk

Monday, March 11, 2019, 17:00–17:15, S HS 2 Physik

Towards Sympathetic Cooling of Protons and Antiprotons — •Matthew Bohman1,2, Pascal Blessing2,3, Jack Devlin2, James Harrington1, Andreas Mooser1,2, Gerog Schneider2,5, Christian Smorra2, Markus Wiesinger1,2, Elise Wursten2,6, Klaus Blaum1, Yasuyuki Matsuda4, Wolfgang Quint3,7, Jochen Walz5,8, and Stefan Ulmer21Max-Planck-Institut für Kernpysik, Germany — 2Fundamental Symmetries Laboratory, RIKEN, Japan — 3GSI, Germany — 4University of Tokyo, Japan — 5Mainz University, Germany — 6CERN, Switzerland — 7Heidelberg University, Germany — 8Helmholtz-Institut Mainz, Germany

High precision measurements on trapped protons and antiprotons provide some of the most stringent tests of CPT symmetry in the baryon sector. In particular, these experiments confirm CPT symmetry and provide further evidence of Lorentz invariance at the level of 10e-24 GeV on an absolute energy scale. Further precision, however, is limited by high particle energies and requires moving beyond the traditional techniques available in high precision cryogenic Penning trap experiments. We present a novel technique to sympathetically cool protons and antiprotons stored in separate traps, by coupling single particles to laser cooled ions via image currents induced in a common endcap electrode. We place our work in the context of an improved g-factor measurement of the proton and show early results including the application of methods to measure sub-thermal single particle energy distributions in the laser cooled limit.

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