Kinetic plasma waves carrying orbital angular momentum
Abstract
The structure of Langmuir plasma waves carrying a finite orbital angular momentum is revised in the paraxial approximation. It is shown that the kinetic effects related to higherorder momenta of the electron distribution function lead to coupling of LaguerreGaussian modes and result in a modification of the wave dispersion and damping. The theoretical analysis is compared to the threedimensional particleincell numerical simulations for a mode with orbital momentum l =2 . It is demonstrated that propagation of such a plasma wave is accompanied with generation of quasistatic axial and azimuthal magnetic fields which result from the orbital and longitudinal momenta transported with the wave, respectively.
 Publication:

Physical Review E
 Pub Date:
 July 2019
 DOI:
 10.1103/PhysRevE.100.013204
 arXiv:
 arXiv:1903.08955
 Bibcode:
 2019PhRvE.100a3204B
 Keywords:

 Physics  Plasma Physics
 EPrint:
 Phys. Rev. E 100, 013204 (2019)