Mainz 2017 – wissenschaftliches Programm
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A: Fachverband Atomphysik
A 20: Poster Session I
A 20.39: Poster
Dienstag, 7. März 2017, 17:00–19:00, P OG1
Formation studies of mesocsopic ion Coulomb crystals at SpecTrap — •Stefan Schmidt1,2, Tobias Murböck3, Zoran Andelkovic4, Gerhard Birkl3, Wilfried Nörtershäuser1, Richard Thompson5, and Manuel Vogel4 — 1Institut für Kernphysik, TU Darmstadt — 2Institut für Kernchemie, Johannes Gutenberg Universität Mainz — 3Institut für Angewandte Physik, TU Darmstadt — 4GSI Helmholtzzentrum für Schwerionenforschung, Darmstadt — 5Imperial College London, SW7 2AZ
We have investigated the formation and geometric structure of mesoscopic Coulomb ion crystals of singly charged magnesium ions stored in a Penning trap [1]. For this purpose, a combination of buffer-gas cooling and Doppler laser cooling was used for rapid crystallization of a sample of externally produced magnesium ions. The presented studies include detailed information of the evolution and dynamics of these ion crystals. In addition, two-species ion crystals were investigated over a large range of charge-to-mass ratios. These results represent an important step towards high-precision laser spectroscopy of highly charged ions as a fundamental test of bound-state QED.
Further, we present the design and concept of a dedicated low-noise charge amplifier [2] for non-destructive single-pass detection of charged particles in a beamline. In our setup, the detector is used as both a sensitive charge counter as well as a timing circuit.
[1] T. Murböck et al.: Phys. Rev. A 94, 043410 (2016)
[2] S. Schmidt et al.: Rev. Sci. Intr. 86, 113302 (2015)