Mainz 2017 – scientific programme

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SYAM: Symposium Atomic Anti-Matter Physics

SYAM 1: Atomic Anti-Matter Physics I

SYAM 1.4: Talk

Thursday, March 9, 2017, 12:30–12:45, P 1

Sympathetic Laser Cooling of Coupled Ions in a Penning Trap — •Matthew Bohman^1,2, Andreas Mooser², Natalie Schön³, Georg Schneider^{2, 3}, James Harrington^{1, 2}, Takashi Higuchi^{2, 4}, Hiroki Nagahama^{2, 4}, Stefan Sellner², Christian Smorra^{2, 5}, Toya Tanaka^{2, 4}, Klaus Blaum¹, Yasuyuki Matsuda⁴, Wolfgang Quint⁶, Jochen Walz^{3, 7}, Yasunori Yamazaki⁸, and Stefan Ulmer² — ¹MPIK Heidelberg, Germany — ²RIKEN, Ulmer IRU, Japan — ³University of Mainz, Germany — ⁴University of Tokyo, Japan — ⁵CERN, Switzerland — ⁶GSI Darmstadt — ⁷HIM Mainz, Germany — ⁸RIKEN, APL, Japan

Many atomic systems cannot practically be directly addressed by an electric dipole cooling transition, however, temperatures on the mK scale or below are often necessary for precision experiments. As a result, ions with a readily accessible transition can be directly cooled and thermally cool the system of interest. To this end, we have designed an experiment with two Penning traps coupled together with a common endcap. Beryllium ions in one trap can be Doppler cooled on one of the 2s-2p lines at approximately 313 nm and a proton, coupled through image currents in the common endcap, should be able to reach temperatures near the Doppler limit. Ultimately, this technique will allow additional precision measurements of the proton, including a stringent test of CPT symmetry through a measurement of the g-factor of the proton and anti-proton.