Bremen 2017 – wissenschaftliches Programm
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P: Fachverband Plasmaphysik
P 13: Magnetic Confinement
P 13.3: Poster
Dienstag, 14. März 2017, 16:30–18:30, HS Foyer
Compression of the radial positron profile in a magnetic dipole trap by rotating electric fields — •J. Horn-Stanja1, U. Hergenhahn1, T. S. Pedersen1,2, H. Saitoh1,3, E. V. Stenson1, M. R. Stoneking4, M. Dickmann5, C. Hugenschmidt5, M. Singer5, and J. R. Danielson6 — 1Max-Planck-Institute for Plasma Physics — 2Ernst-Moritz-Arndt University Greifswald — 3University of Tokyo — 4Lawrence University — 5Technische Universität München — 6University of California, San Diego
An electron-positron plasma is, in contrast to a conventional electron-ion plasma, characterized by the mass balance of the oppositely charged components. Although offering a fundamentally different playground for plasma physics, the experimental investigation of these plasmas is still in its infancy. The APEX project aims to create the first magnetically confined electron-positron plasma by first accumulating positrons from the world's most intense positron source NEPOMUC in novel linear trapping devices (the Positron Accumulation eXperiment PAX) and second injecting them into a magnetic dipole trap which allows to confine them simultaneously with electrons.
Recent experiments with a prototype dipole trap operated at the NEPOMUC source proved the interaction of rotating electric fields with positrons in a magnetic dipole field. In a broad frequency range around 150kHz a compression of the radial positron profile was observed. In this contribution, results from these experiments as well as from simulations on the interaction of rotating electric fields with positrons in this dipole trap will be presented.