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A canonical view on particle acceleration by electromagnetic pulses

Published online by Cambridge University Press:  18 March 2022

F. Russman Open the ORCID record for F. Russman [Opens in a new window] ,
S. Marini Open the ORCID record for S. Marini [Opens in a new window]  and
F.B. Rizzato
F. Russman*
Affiliation:
Instituto de Física, Universidade Federal do Rio Grande do Sul, Caixa Postal 15051, 91501-970 Porto Alegre, RS, Brasil
S. Marini*
Affiliation:
LSI, CEA/DRF/IRAMIS, CNRS, École Polytechnique, Institut Polytechnique de Paris, F-91120 Palaiseau, France LULI, Sorbonne Université, CEA, CNRS, École Polytechnique, Institut Polytechnique de Paris, F-75252 Paris, France
F.B. Rizzato*
Affiliation:
Instituto de Física, Universidade Federal do Rio Grande do Sul, Caixa Postal 15051, 91501-970 Porto Alegre, RS, Brasil
*
†Email addresses for correspondence: russman@ufrgs.br, samuel.marini@polytechnique.edu, rizzato@if.ufrgs.br
†Email addresses for correspondence: russman@ufrgs.br, samuel.marini@polytechnique.edu, rizzato@if.ufrgs.br
†Email addresses for correspondence: russman@ufrgs.br, samuel.marini@polytechnique.edu, rizzato@if.ufrgs.br
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Abstract

In the present work we investigate the dynamics of electrons under the action of wave packets of high-frequency electromagnetic carrier waves. When the group velocities of the packets are subluminal, electrons can be efficiently accelerated. We show that the whole process can be described by an accurate ponderomotive canonical formalism that includes relevant extensions of the original ponderomotive approach applied to carriers moving at the speed of light. Single-particle simulations validate our analytical approach and show that extended canonical methods provide better agreement with numerics than previous investigations. In particular, we obtain a precise relationship between the wave amplitude and group velocity for optimum acceleration of initially stationary targets.

Keywords

plasma wavesintense particle beamsplasma nonlinear phenomena
Type
Research Article
Information
Journal of Plasma Physics , Volume 88 , Issue 2 , April 2022 , 905880204
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Copyright
Copyright © The Author(s), 2022. Published by Cambridge University Press

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References

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