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arXiv · 0906.0517

Laser Singular Theta-Pinch

A. Yu. Okulov
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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.

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A. Yu. Okulov. 2009-06-02. Laser Singular Theta-Pinch. https://doi.org/10.1016/j.physleta.2010.09.014

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