Finite-amplitude RF heating rates for magnetized electrons in neutral plasma

Guthrie, John M; Roberts, Jacob L

doi:10.48550/arxiv.2104.02267

Cited by 1 publication

(1 citation statement)

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“…A prominent laboratory example is non-neutral plasmas 32 , such as the plasmas in antimatter traps 33 , which can reach very strongly magnetized conditions. A host of other experiments may reach strongly magnetized conditions in the near future, including ultracold neutral plasmas [34][35][36][37] , dusty plasmas [38][39][40] , plasmas in highly compressed magnetized inertial confinement fusion experiments 41,42 , and in intense laser-matter interaction experiments 43 . Regimes in which electrons reach a marginal level of strong magnetization (β e ∼ 1) are more common, including electrons in tokamak experiments 44 .…”

Section: Introductionmentioning

confidence: 99%

dc electrical conductivity in strongly magnetized plasmas

Baalrud,

Lafleur

2021

Preprint

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A generalized Ohm's law is derived to treat strongly magnetized plasmas in which the electron gyrofrequency significantly exceeds the electron plasma frequency. The frictional drag due to Coulomb collisions between electrons and ions is found to shift, producing an additional transverse resistivity term in the generalized Ohm's law that is perpendicular to both the current (J) and the Hall (J × B) direction. In the limit of very strong magnetization, the parallel resistivity is found to increase by a factor of 3/2, and the perpendicular resistivity to scale as ln(ω ce τ e ), where ω ce τ e is the Hall parameter. Correspondingly, the parallel conductivity coefficient is reduced by a factor of 2/3, and the perpendicular conductivity scales as ln(ω ce τ e )/(ω ce τ e ) 2 . These results suggest that strong magnetization significantly changes the magnetohydrodynamic evolution of a plasma.

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