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Updated: Jan 19, 2026

Principle, Conservation and Measurement of Angular Momentum

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 Korneev^2,3

¹CELIA, University of Bordeaux, CNRS, CEA, F-33405 Talence, France.

Physical Review. E

|September 11, 2019

Summary

This study revises Langmuir plasma waves with orbital angular momentum, revealing kinetic effects that alter wave dispersion and damping. Simulations show these waves generate magnetic fields during propagation.

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Angular Momentum

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Last Updated: Jan 19, 2026

Principle, Conservation and Measurement of Angular Momentum

Principle, Conservation and Measurement of Angular Momentum

Published on: April 30, 2023

Angular Momentum

Angular Momentum

Conservation of Angular Momentum

Conservation of Angular Momentum

Area of Science:

Plasma Physics
Wave Phenomena
Kinetic Theory

Background:

Langmuir plasma waves are fundamental to understanding plasma dynamics.
Orbital angular momentum (OAM) in waves can lead to novel phenomena.
Previous models may not fully capture kinetic effects in OAM-carrying waves.

Purpose of the Study:

To revise the structure of Langmuir plasma waves with finite orbital angular momentum (OAM).
To investigate the influence of kinetic effects on wave dispersion and damping.
To explore the generation of magnetic fields by these waves.

Main Methods:

Theoretical analysis using the paraxial approximation.
Incorporation of kinetic effects from higher-order electron momenta.
Comparison with three-dimensional particle-in-cell (PIC) numerical simulations.

Main Results:

Kinetic effects couple Laguerre-Gaussian modes, modifying wave dispersion and damping.
Simulations confirm theoretical predictions for OAM modes (l=2).
Plasma wave propagation generates quasistatic axial and azimuthal magnetic fields.

Conclusions:

Kinetic effects are crucial for accurately describing OAM-carrying Langmuir waves.
The generation of magnetic fields is a direct consequence of momentum transport by these waves.
This research provides a more complete understanding of wave-particle interactions in magnetized plasmas.