Ultra-Short Laser Absorption In Solid Targets
- Laboratoire Electronique Quantique, Faculte de Physique, U. S. T. H. B., BP 32 El Alia, Algiers (Algeria)
With the rapid development and continuously improving technology of subpicosecond laser pulse generation, new interesting physical problems are now investigated. Among them the laser light absorption in solid targets. During the interaction with solid targets, high intensity laser pulses are absorbed by electrons in optical skin depths, leading to rapid ionization before that significant ablation of solid material takes place. The ultra-short laser is absorbed in the overdense plasma through the electron-ion collisions (normal skin effect) or collisionless mechanisms (anomalous skin effect or sheath inverse bremsstrahlung). These two regimes depend on the laser intensity, the plasma temperature and the ionization state Z. In this work we solve numerically the Fokker-Planck equation to compute the electron distribution function in the skin layer. In the second step we compute the surface impedance and we deduce the absorption coefficient.
- OSTI ID:
- 21251389
- Journal Information:
- AIP Conference Proceedings, Vol. 1047, Issue 1; Conference: LAPAMS'08: 1. international conference on laser plasma applications in materials science, Algiers (Algeria), 23-26 Jun 2008; Other Information: DOI: 10.1063/1.2999925; (c) 2008 American Institute of Physics; Country of input: International Atomic Energy Agency (IAEA); ISSN 0094-243X
- Country of Publication:
- United States
- Language:
- English
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