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Journal of Experimental and Theoretical Physics

, Volume 103, Issue 2, pp 183–197 | Cite as

Ablated matter expansion and crater formation under the action of ultrashort laser pulse

  • S. I. Anisimov
  • V. V. Zhakhovskiĭ
  • N. A. Inogamov
  • K. Nishihara
  • Yu. V. Petrov
  • V. A. Khokhlov
Atoms, Molecules, Optics

Abstract

The action of a subpicosecond laser pulse on a target made of an absorbing condensed substance is considered. The propagation of an electron heat conduction wave and the crystal lattice heating prior to the hydrodynamic expansion of the target are analyzed. In these initial interaction stages, a heated layer with a thickness of d T is formed at the target surface. The dependence of d T on the absorbed laser energy density F[J/cm2] is evaluated. The motion of ablated matter in the expansion stage is described using a numerical solution of the equations of gasdynamics and the results of molecular dynamics (MD) simulations. The MD simulations are performed using a large number (∼103) of parallel processors, which allows the number of model atoms to be increased up to a level (about 3.5 × 107) close to that encountered under real experimental conditions.

PACS numbers

79.20.Ds 81.16.Mk 

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Copyright information

© Pleiades Publishing, Inc. 2006

Authors and Affiliations

  • S. I. Anisimov
    • 1
  • V. V. Zhakhovskiĭ
    • 2
    • 3
  • N. A. Inogamov
    • 1
  • K. Nishihara
    • 3
  • Yu. V. Petrov
    • 1
  • V. A. Khokhlov
    • 1
  1. 1.Landau Institute for Theoretical PhysicsRussian Academy of SciencesChernogolovka, Moscow oblastRussia
  2. 2.Institute for High Energy Densities, Joint Institute for High TemperaturesRussian Academy of SciencesMoscowRussia
  3. 3.Institute of Laser EngineeringOsaka UniversityOsakaJapan

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