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Updated: Jan 19, 2026
Principle, Conservation and Measurement of Angular Momentum
Published on: April 30, 2023
Kinetic plasma waves carrying orbital angular momentum
D R Blackman1, R Nuter1, Ph Korneev2,3
1CELIA, University of Bordeaux, CNRS, CEA, F-33405 Talence, France.
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 higher-order momenta of the electron distribution function lead to coupling of Laguerre-Gaussian modes and result in a modification of the wave dispersion and damping. The theoretical analysis is compared to the three-dimensional particle-in-cell 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.
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