Mainz 2017 – wissenschaftliches Programm
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SYAM: Symposium Atomic Anti-Matter Physics
SYAM 1: Atomic Anti-Matter Physics I
SYAM 1.5: Vortrag
Donnerstag, 9. März 2017, 12:45–13:00, P 1
The Proton g-Factor Experiment at Mainz — •Georg Schneider1,2, Matthew Bohman3, Andreas Mooser2, Natalie Schön1, James Harrington3, Takashi Higuchi2,4, Hiroki Nagahama2,4, Stefan Sellner2, Christian Smorra2,5, Toya Tanaka2,4, Klaus Blaum3, Yasuyuki Matsuda4, Wolfgang Quint6, Jochen Walz1,7, Yasunori Yamazaki8, and Stefan Ulmer2 — 1University of Mainz, Germany — 2RIKEN, Ulmer IRU, Japan — 3MPIK Heidelberg, Germany — 4University of Tokyo, Japan — 5CERN, Switzerland — 6GSI Darmstadt, Germany — 7HIM Mainz, Germany — 8RIKEN, APL, Japan
In 2014 we measured the g-factor of a single proton in a Penning trap with a relative precision of 3.3 parts per billion. Now we aim to improve the precision even further to a level of 10−10 or better.
The measurement technique makes use of two spatially separated traps, the homogeneous precision trap (PT) to perform high-precision frequency measurements and the analysis trap (AT) with a superimposed magnetic inhomogeneity to detect the spin-state. One of the previous limitations was a residual magnetic field inhomogeneity in the PT caused by the AT. To reduce this systematic effect the distance between the two traps was increased. Furthermore, a self-shielding coil and new detectors were installed. Ultimately, the implementation of these improved techniques at our antiproton experiment BASE at CERN will provide one of the most sensitive tests of the fundamental CPT symmetry in the baryon sector.