Back Flux for Pulsed Laser Evaporation into Vacuum

Abstract

This paper proposes results on calculation of the back flux for the case of pulsed laser evaporation into vacuum. On the basis of the direct Monte Carlo simulation, one-dimensional plane expansion of vapor cloud was calculated for a wide range of the number of evaporated monolayers. A substantial back flux rise is observed if the rotational degrees of freedom are taken into account. Influence of relaxation collision number on the back flux is demonstrated. Computations that combine the laser-induced target heating calculation and the direct Monte Carlo simulation of vapor cloud expansion show an insignificant effect of the time evolution of the surface temperature on the back flux.

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Document Details

Document Type
Technical Report
Publication Date
Jul 13, 2005
Accession Number
ADA445961

Entities

People

  • Alexey A. Morozov

Organizations

  • Russian Academy of Sciences

Tags

Communities of Interest

  • Air Platforms
  • Energy and Power Technologies

DTIC Thesaurus Topics

  • Ablation
  • Boltzmann Equation
  • Collisions
  • Energy
  • Energy Transfer
  • Equations
  • Evaporation
  • Heat Energy
  • Heat Of Fusion
  • Lasers
  • Latent Heat
  • Monte Carlo Method
  • Optical Properties
  • Pulsed Lasers
  • Simulations
  • Surface Temperature
  • Thermal Conductivity

Fields of Study

  • Physics

Readers

  • Computational Modeling and Simulation
  • Optical Physics and Photonics.
  • Plasma Physics / Magnetohydrodynamics

Technology Areas

  • Directed Energy
  • Directed Energy - Pulsed-Laser Deposition