Berlin 2014 – wissenschaftliches Programm

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A: Fachverband Atomphysik

A 21: Precision spectroscopy of atoms and ions III (with Q)

A 21.2: Vortrag

Dienstag, 18. März 2014, 14:15–14:30, BEBEL SR140/142

The BASE Penning trap system — •Georg Ludwig Schneider^1,3, Christian Smorra¹, Kurt Alan Franke^1,2, Andreas Mooser³, Hiroki Nagahama^1,4, Klaus Blaum², Yasuyuki Matsuda⁴, Christian Ospelkaus⁵, Wolfgang Quint⁶, Jochen Walz³, Yasunori Yamazaki⁷, and Stefan Ulmer¹ — ¹RIKEN Ulmer IRU, Japan — ²MPI-K Heidelberg, Germany — ³University of Mainz, Germany — ⁴Tokyo University, Japan — ⁵University of Hannover, Germany — ⁶GSI Darmstadt, Germany — ⁷RIKEN APL, Japan

The Baryon Antibaryon Symmetry Experiment (BASE) at CERN aims to measure the g-factor of the antiproton with a precision of one part per billion. This will provide a stringent test of CPT symmetry with baryons.

A single antiproton stored in a cryogenic Penning trap system is used to perform this measurement. The g-factor will be determined by measuring the frequency ratio ν_L/ν_c, where ν_L is the spin precession frequency and ν_c the cyclotron frequency. To achieve this goal an advanced Penning trap system, consisting of four traps was developed. Analysis and precision trap are used to observe single spin flips and obtain the desired frequencies. Cooling and reservoir trap on the other hand allow efficient particle cooling and long-term storage of an antiproton reservoir.

The talk will give an overview on the design, characterization and implementation of this trapping system into the BASE apparatus.