Electrostatic equilibria of non-neutral plasmas confined in a Penning trap with axially varying magnetic field

Lane, R. A.; Ordonez, C. A.

doi:10.1063/1.5092136

Electrostatic equilibria of non-neutral plasmas confined in a Penning trap with axially varying magnetic field

Journal Article · Tue May 21 00:00:00 EDT 2019 · Physics of Plasmas

DOI:https://doi.org/10.1063/1.5092136· OSTI ID:1609767

Lane, R. A. ^[1]; ^[2]

Ball Aerospace, Albuquerque, NM (United States); Univ. of North Texas, Denton, TX (United States); DOE/OSTI
Univ. of North Texas, Denton, TX (United States)

A procedure for computing the electrostatic equilibria of non-neutral plasmas in a Penning trap with a nonuniform magnetic field by solving Poisson's equation using an iterative method is described. Plasma equilibria in a model Penning trap with high and low field regions are computed. The plasma is assumed to follow the Boltzmann density distribution along magnetic field lines. Correspondence with previous investigations examining similar configurations analytically and using particle-in-cell simulations is found. The relationship between the plasma density in low and high field regions is examined for various plasma temperatures, densities, magnetic mirror ratios, and plasma and electrode radii. An analytical description of the radial density profile in the high field region is developed and compared with the computed equilibria. A concept is described for cooling a positron plasma with laser-cooled ions trapped axially within a high magnetic field region, while antiprotons are trapped axially separated from the laser-cooled ions within a low field region, and the positron plasma extends to both regions.

View Accepted Manuscript (DOE)

Research Organization:: Univ. of North Texas, Denton, TX (United States)

Sponsoring Organization:: USDOE Office of Science (SC)

Grant/Contract Number:: FG02-06ER54883

OSTI ID:: 1609767

Alternate ID(s):: OSTI ID: 1514757

Journal Information:: Physics of Plasmas, Journal Name: Physics of Plasmas Journal Issue: 5 Vol. 26; ISSN 1070-664X

Publisher:: American Institute of Physics (AIP)Copyright Statement

Country of Publication:: United States

Language:: English

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Electrostatic equilibria of non-neutral plasmas confined in a Penning trap with axially varying magnetic field

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