Bulletin of the American Physical Society
76th Annual Gaseous Electronics Conference
Volume 68, Number 9
Monday–Friday, October 9–13, 2023; Michigan League, Ann Arbor, Michigan
Session IW5: Poster Session II; Exhibition & Coffee (4:00pm-6:00pm)
4:00 PM,
Wednesday, October 11, 2023
Room: Michigan League, Ballroom
Abstract: IW5.00001 : Temperature Relaxation Rates for Strongly Magnetized Plasmas in Antimatter Traps*
Presenter:
James C Welch
(University of Michigan)
Authors:
James C Welch
(University of Michigan)
Louis Jose
(University of Michigan)
Tim D Tharp
(Marquette Univ)
Scott D Baalrud
(University of Michigan)
Using a recently developed generalized Boltzmann kinetic theory for strongly magnetized plasmas, the electron-ion temperature relaxation rates in both parallel and perpendicular directions are calculated. In this regime, the particles will emit radiation in the perpendicular direction producing an anisotropy between the parallel and perpendicular temperatures which is transferred to the other species via Coulomb collisions. These results have relevance in several processes used in the ALPHA experiment, including antiproton cooling via Coulomb collisions with electrons, the thermal equilibration between antiprotons and positrons during recombination, and the sympathetic cooling of positrons on laser-cooled Beryllium. The improved understanding of temperature relaxation presented here will contribute to a more complete fluid model in this novel plasma regime.
*This material is based upon work supported by the U.S. National Science Foundation under Grant No. PHY-2205506.
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