Hannover 2020 – wissenschaftliches Programm

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P: Fachverband Plasmaphysik

P 11: Laser plasma and laser applications 1

P 11.7: Vortrag

Mittwoch, 11. März 2020, 12:45–13:00, b302

Wigner crystals in bunches with finite emittance in the bubble regime — •Lars Reichwein, Johannes Thomas, and Alexander Pukhov — Institut für Theoretische Physik I, Heinrich-Heine-Universität Düsseldorf, Düsseldorf

The influence of non-zero emittance onto the spatial structure of an equilibrium electron bunch in a quasi-static bubble model is studied. The full Liénard-Wiechert potentials are used to calculate the relativistic inter-particle interaction while the external force is described in the context of a simplified bubble model [1]. We introduce transverse momenta as a perturbation approach of the previous zero-emittance model [2]. For low emittances the crystalline structure of the bunch is preserved, while for higher emittances the observed symmetry is broken. In the region of this phase transition a widening of the structure and formation of various shells can be observed. These structural changes resemble those of the zero-emittance model when the parameters momentum, plasma wavelength and total particle number were varied.

[1] I. Kostyukov et al., Phys. Plasmas 11, 5256 (2004)

[2] L. Reichwein et al., arXiv:1903.04858 (2019)