Laser Singular Theta-Pinch
Abstract
The interaction of the two counter-propagating ultrashort laser pulses with a singular wavefronts in the thin slice of the underdense plasma is considered. It is shown that ion-acoustic wave is excited via Brillouin three-wave resonance by corkscrew interference pattern of a paraxial singular laser beams. The orbital angular momentum carried by light is transferred to plasma ion-acoustic vortex. The rotation of the density perturbations of electron fluid is the cause of helical current which produce the kilogauss axial quasi-static magnetic field. The exact analytical configurations are presented for an ion-acoustic current field and magnetic induction. The range of experimentally accessible parameters is evaluated.
Cite
@article{arxiv.0906.0517,
title = {Laser Singular Theta-Pinch},
author = {A. Yu. Okulov},
journal= {arXiv preprint arXiv:0906.0517},
year = {2015}
}
Comments
6 pages, 2 figures, accepted to publication in Physics Letters A