Electrostatic equilibria of non-neutral plasmas confined in a Penning trap with axially varying magnetic field
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.
- 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, Vol. 26, Issue 5; ISSN 1070-664X
- Publisher:
- American Institute of Physics (AIP)Copyright Statement
- Country of Publication:
- United States
- Language:
- English
Web of Science
Similar Records
Simulation studies of non-neutral plasma equilibria in an electrostatic trap with a magnetic mirror
A new scheme to accumulate positrons in a Penning-Malmberg trap with a linac-based positron pulsed source