Friction force in strongly magnetized plasmas

dc electrical conductivity in strongly magnetized plasmas

“…In contrast to this expectation, linear response theory was used to predict that strong magnetization of the background plasma causes the friction force to shift, obtaining a transverse component that is perpendicular to the velocity of the test charge in the plane formed by the velocity and magnetic field 27 . This prediction was later tested using first-principles molecular dynamics simulations, which were found to agree well with the theoretical predictions 29 . It causes non-intuitive effects on the motion of a test charge, such as causing the gyroradius of a fast particle to increase in time 27 .…”

“…A summary of example parameters can be found in table 1 of Ref. 29. The results of this study show a novel effect on electrical transport is expected to influence these plasmas, which in turn influences other transport behaviors including magnetic field evolution and energy dissipation.…”

“…Recent work has considered in detail the friction force on a test ion moving through a strongly magnetized electron background, revealing novel behaviors 18,21,[27][28][29] . Friction is normally expected to act antiparallel to the velocity of the test charge; 18,30 an expectation set by predictions of kinetic theory in the weakly magnetized regime.…”

A Kinetic Model of Friction in Strongly Coupled Strongly Magnetized Plasmas

“…The transverse force is perpendicular to both the velocity and Lorentz force, so it lies in the plane formed by the velocity and magnetic field. The transverse force was initially identified in the strongly magnetized regime for plasmas with temperature anisotropy 4,26,27 and was later predicted for the Maxwellian plasmas using the linear response theory 24,25 and confirmed by the molecular dynamics simulations 28,29 . Since the transverse force is perpendicular to the velocity, it does not decrease the kinetic energy of the projectile.…”

Dynamic structure factor of the magnetized one-component plasma: crossover from weak to strong coupling

“…Examples range from ions in warm dense matter [1,2] (solid densities), ultra cold neutral [3] and nonneutral plasmas [4] (mK temperatures), to complex (or dusty) plasmas [5] (highly charged dust particles). Recent experimental advances in the magnetic confinement of ultra cold neutral plasmas [6], high energy density matter [7], and dusty plasmas [8][9][10][11], as well as theoretical efforts concerning, e.g., the stopping power [12][13][14][15] and transport coefficients [16][17][18][19][20][21][22][23][24] demonstrate growing interest in the physics of magnetized strongly correlated plasmas-conditions relevant to the outer layers of neutron stars [25][26][27][28][29], confined antimatter [30,31], or magnetized target fusion [32,33]. In this challenging regime, the familiar theory of Braginskii [34] is no longer applicable, and new theoretical concepts as well as first-principle simulations are required.…”