Berlin 2014 – wissenschaftliches Programm
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P: Fachverband Plasmaphysik
P 20: Poster Session - Dusty Plasmas
P 20.10: Poster
Mittwoch, 19. März 2014, 16:30–18:30, SPA Foyer
Progress towards making a plasma of positrons and electrons — Eve Stenson1, Haruhiko Saitoh1, Holger Niemann1, Norbert Paschkowski1, •Uwe Hergenhahn1, Gerrit Marx2, Lutz Schweikhard2, James Danielson3, Cliff Surko3, Christoph Hugenschmidt4, and T. Sunn Pedersen1 — 1Max-Planck-Institut für Plasmaphysik, Greifswald — 2Ernst-Moritz-Arndt-Universität Greifswald — 3UC San Diego, CA, USA — 4FRM II, TU München
Laboratory experiments on a pair plasma comprising electrons and positrons would be of huge interest for basic plasma science, numerical simulation of plasma turbulence, and astrophysics. In this project, we plan to use the NEPOMUC positron beamline at the FRM II reactor, together with plasma confinement in the magnetic field of a levitated, superconducting current loop, to make controlled experimental studies of such plasmas possible for the first time. Numerical simulations of strategies for injecting a cold positron beam into a magnetic dipole field will be presented. Plasma densities can be greatly increased by interfacing the confinement device to NEPOMUC with an efficient positron trap and accumulator. Therefore, in parallel we have started experiments on trapping and accumulating large numbers of electrons and positrons, and will report about the use of Penning-Malmberg traps for this purpose.