SMuK 2023 – wissenschaftliches Programm

Bereiche | Tage | Auswahl | Suche | Aktualisierungen | Downloads | Hilfe

P: Fachverband Plasmaphysik

P 12: Poster II

P 12.24: Poster

Mittwoch, 22. März 2023, 17:30–19:00, HSZ EG

Thermal equilibrium for non-neutral plasma in a magnetic dipole trap — •Patrick Steinbrunner¹, Matthew R. Stoneking², Thomas M. O'Neil³, and Daniel H. E. Dubin³ — ¹Max Planck Institute for Plasma Physics, Greifswald, Germany — ²Lawrence University, Appleton, USA — ³University of California San Diego, La Jolla, USA

The confinement of a non-neutral plasma in a thermal equilibrium state is known to be possible in the uniform magnetic field of a Penning-Malmberg trap. We generalize the theory of these states to include inhomogeneous magnetic dipole fields. We present computational results for local thermal equilibria along magnetic field lines as well as global thermal equilibria and there respective zero-temperature limits. The distribution function of a global thermal equilibrium state is obtained by maximizing the plasma entropy subject to fixed values for the total number of particles, total energy and total canonical angular momentum. If a non-neutral plasma arrives in this state, there is no conceptual limit on the confinement time. Such a configuration also confines a quasi neutral plasma for a finite amount of time, making it an attractive candidate for the creation of an electron-positron pair plasma as planned by the APEX collaboration.