Bulletin of the American Physical Society
64th Annual Meeting of the APS Division of Plasma Physics
Volume 67, Number 15
Monday–Friday, October 17–21, 2022; Spokane, Washington
Session CP11: Poster Session II: In-Person, Hall A (2:00-3:30pm) and Virtual Poster Presentations (3:45-5:00pm)
MFE: Low Aspect Ratio; Superconducting
FUND: Nonneutral, Antimatter, Strong coupled Plasmas; Waves
2:00 PM - 5:00 PM
Monday, October 17, 2022
Room: Exhibit Hall A and Online
Abstract: CP11.00067 : Global thermal equilibrium for non-neutral plasma in non-uniform field traps with cylindrical symmetry*
Presenter:
Patrick Steinbrunner
(Max Planck Institute for Plasma Physics)
Authors:
Patrick Steinbrunner
(Max Planck Institute for Plasma Physics)
Matthew R Stoneking
(Lawrence University)
Thomas M O'Neil
(University of California, San Diego)
Daniel H Dubin
(University of California, San Diego)
Collaboration:
APEX Collaboration
be possible in the uniform magnetic field of a Penning-Malmberg trap [1]. 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 [2]. If a non-neutral plasma arrives in this state, there is no theoretical limit on the
confinement time. We generalize the theory of these states to include cylindrical symmetric traps
with non-uniform magnetic fields. We construct configurations that enable the confinement of
a plasma with the topology of a torus in a magnetic dipole field. Such a configuration also
confines a neutral plasma for a finite amount of time, making it an attractive candidate for the
creation of an electron-positron pair plasma [3].
[1] S. A. Prasad and T. M. O’Neil. "Finite length thermal equilibria of a pure electron plasma column," Phys.
Fluids 22, 278 (1979).
[2] T. O’Neil and D. H. Dubin, Thermal equilibria and thermodynamics of trapped plasmas with a single sign of
charge, Physics of Plasmas 5, 2163 (1998).
[3] M. R. Stoneking et al. "A new frontier in laboratory physics: magnetized electron–positron plasmas." Journal
of Plasma Physics 86.6 (2020).
*This work has received support from the European Research Council (ERC) under the European Union's Horizon 2020 research and innovation programme.
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