Diffusion model for fast alpha-particle transport in Magneto-Inertial Fusion plasmas
Abstract
A diffusion model is developed to describe fast alpha-particle transport and confinement in dense magnetized DT fusion plasmas, tailored to Magneto-Inertial Fusion conditions. The model, derived from the Fokker-Planck kinetic equation using the Chapman-Enskog approximation, includes dynamic Coulomb friction from electrons and ions. This approach improves upon earlier heuristic model [Liberman and Velikovich, J. Plasma Phys. 31, 369 (1984)], which, while valid in the ignition range near 5 keV, lacks accuracy at the higher temperatures ~20 keV required for high-gain Magnetized Liner Inertial Fusion (MagLIF). This paper provides explicit analytic formulas for all transport coefficients and characterizes the relationship between the alpha-particle pressure gradient and the associated Ampère force in magnetized plasmas, which are both relevant for MagLIF at high temperatures.
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BibTeX
@misc{velikovich2026diffusion,
title = {{Diffusion model for fast alpha-particle transport in Magneto-Inertial Fusion plasmas}},
author = {Alexander Velikovich and Fernando García-Rubio and Scott Davidson and Lee Ellison and Jason Hamilton and Paul Schmit},
howpublished = {arXiv},
year = {2026},
month = oct,
doi = {10.48550/arxiv.2610.38839},
eprint = {2610.38839},
archivePrefix = {arXiv},
url = {https://arxiv.org/abs/2610.38839},
}
RIS
TY - UNPB
TI - Diffusion model for fast alpha-particle transport in Magneto-Inertial Fusion plasmas
AU - Alexander Velikovich
AU - Fernando García-Rubio
AU - Scott Davidson
AU - Lee Ellison
AU - Jason Hamilton
AU - Paul Schmit
PY - 2026
DA - 2026/10/28
PB - arXiv
DO - 10.48550/arxiv.2610.38839
UR - https://arxiv.org/abs/2610.38839
AB - A diffusion model is developed to describe fast alpha-particle transport and confinement in dense magnetized DT fusion plasmas, tailored to Magneto-Inertial Fusion conditions. The model, derived from the Fokker-Planck kinetic equation using the Chapman-Enskog approximation, includes dynamic Coulomb friction from electrons and ions. This approach improves upon earlier heuristic model [Liberman and Velikovich, J. Plasma Phys. 31, 369 (1984)], which, while valid in the ignition range near 5 keV, lacks accuracy at the higher temperatures ~20 keV required for high-gain Magnetized Liner Inertial Fusion (MagLIF). This paper provides explicit analytic formulas for all transport coefficients and characterizes the relationship between the alpha-particle pressure gradient and the associated Ampère force in magnetized plasmas, which are both relevant for MagLIF at high temperatures.
ER -