Investigation Of Plasma Critical Surface Rippling By Harmonics Generation In Laser Plasmas
- KFKI RMKI, EURATOM Association, P.O.Box 49, H-1525 Budapest (Hungary)
- University of Szeged, Department of Experimental Physics, H-6720 Szeged (Hungary)
Experiments were carried out by a tightly focused, prepulse-free hybrid KrF excimer-dye laser system (700fs pulse duration, 248nm wavelength, 15mJ pulse energy). Intense 2{omega}, 3{omega} and near threshold 4{omega} were generated in laser plasmas on solid surfaces for p- and s-polarized 1.5{center_dot}1017 W/cm2 radiation intensity. Directionality and polarization properties were investigated depending on the laser intensity and polarization. The observations showed diffuse propagation of harmonics for intensities above 1016 W/cm2 and the polarization of harmonics was mixed for the highest intensities. The explanation of these results is surface rippling of the plasma critical surface because of the Rayleigh-Taylor instability, which is an intrinsic consequence of the unstable balance between light pressure and plasma expansion.
- OSTI ID:
- 20797920
- Journal Information:
- AIP Conference Proceedings, Vol. 812, Issue 1; Conference: PLASMA 2005: International conference on research and applications of plasmas; 3. German-Polish conference on plasma diagnostics for fusion and applications; 5. French-Polish seminar on thermal plasma in space and laboratory, Opole-Turawa (Poland), 6-9 Sep 2005; Other Information: DOI: 10.1063/1.2168845; (c) 2006 American Institute of Physics; Country of input: International Atomic Energy Agency (IAEA); ISSN 0094-243X
- Country of Publication:
- United States
- Language:
- English
Similar Records
Numerical Investigation of the Rippling Effect at the Interaction of an Ultrashort Laser Pulse with Inhomogeneous Plasma
Phase-matched second- and third-harmonic generation in plasmas with density ripple