Influence of Toroidal Flow on Stationary Density of Collisionless Plasmas
Elias Laribi, Shun Ogawa, Guilhem Dif-Pradalier and 3 more
Fluids · 2019
doi:10.3390/fluids4030172 (opens in a new tab)
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Abstract
Starting from the given passive particle equilibrium particle cylindrical profiles, we built self-consistent stationary conditions of the Maxwell-Vlasov equation at thermodynamic equilibrium with non-flat density profiles. The solutions to the obtained equations are then discussed. It appears that the presence of an azimuthal (poloidal) flow in the plasma can ensure radial confinement, while the presence of a longitudinal (toroidal) flow can enhance greatly the confinement. Moreover in the global physically reasonable situation, we find that no unstable point can emerge in the effective integrable Hamiltonian of the individual particles, hinting at some stability of the confinement when considering a toroidal geometry in the large aspect ratio limit.
Abstract licence: CC BY
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