 |
École polytechnique Open archive |  |
 |
Journal articles
Enhanced Spatiotemporal Laser-Beam Smoothing in Gas-Jet Plasmas
Abstract : Spatiotemporal smoothing of large-scale laser intensity fluctuations is observed for a laser beam focused into underdense helium plasmas. This smoothing is found to be severely enhanced when focusing the laser beam into a helium gas jet. In contrast to other experiments with preformed plasmas, the average and the peak laser intensities are well below the threshold for ponderomotive self-focusing. The coherence characteristics of the transmitted light are measured for various electron densities, and the smoothing effect is explained by multiple scattering of laser light on self-induced density perturbations.
https://hal-polytechnique.archives-ouvertes.fr/hal-00518894
Contributor : Thuy Le <>
Submitted on : Friday, September 17, 2010 - 2:59:36 PM
Last modification on : Wednesday, December 2, 2020 - 5:38:03 PM
Contributor : Thuy Le <>
Submitted on : Friday, September 17, 2010 - 2:59:36 PM
Last modification on : Wednesday, December 2, 2020 - 5:38:03 PM