Diffraction and the evolution of small scale filaments in a laser-produced plasma
- 9 October 1989
- journal article
- research article
- Published by American Physical Society (APS) in Physical Review Letters
- Vol. 63 (15) , 1597-1600
- https://doi.org/10.1103/physrevlett.63.1597
Abstract
Intense laser light filamentation in a hydrogen plasma is investigated using a two-dimensional hydrodynamic simulation code. The laser paraxial wave equation is used to study the focusing which results from a Gaussian hot-spot intensity perturbation. It is found that diffraction increases the scale size of small scale off-axis filamentation, and significantly raises the ponderomotive self-focusing intensity threshold. Radially propagating density fluctuations, contributing to small scale focusing, are observed due to the self-consistent treatment of hydrodynamics in the simulations.Keywords
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