Speaker
Description
See the full abstract here:
http://ocs.ciemat.es/EPS2019ABS/pdf/P2.2015.pdf
In the present analysis we incorporate radiation effects to the study of the relativistic dynamics of charged particles submitted to the action of slowly modulated, high-frequency electrostatic waves with large amplitudes. Previous analyses ignoring radiation reaction indicate that this setting may be very efficient in terms of particle acceleration [1, 2]. As lower velocity particles are injected in low field end of the modulated pulse, uphill ponderomotive forces pull particles to higher velocities until they are trapped by the high-frequency carrier with subsequent extreme resonant acceleration.
The first acceleration stage provided by the ponderomotive effects is relatively smooth, but we have observed that the trapping and subsequent intense resonant acceleration is significantly affected by radiation reaction effects. Under circumstances where trapped particles extract energy from the slowly modulated wave in an adiabatic fashion, radiation reaction becomes critical in determining how long the process lasts until particles are ejected from the wave troughs.
We make use of the well known formalism of Landau and Lifschitz [3] to estimate radiative losses. Results reveal good agreement with modern accounts on the subject [4]. The equivalent process driven by lasers shall be briefly discussed as well.
References
[1] S. Marini, E. Peter, G. I. Oliveira, and F. B. Rizzato, Physics of Plasmas 24, 093113 (2017).
[2] I. Almansa, D. A. Burton, R. A. Cairns, S. Marini, E. Peter, F.B. Rizzato, and F. Russman, Physics of Plasmas
25, 113107 (2018).
[3] L. Landau and E. Lifchitz Théorie du Champ, Mir, Moscow (1966). [4] M. Tamburini, Radiation Reaction Effects in Super Intense Laser-Plasma Interaction, Ph. D Thesis, University of Pisa (2011).
