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Title: Gas-dynamic acceleration of laser-ablation plumes: Hyperthermal particle energies under thermal vaporization

Abstract

The expansion of a plume produced by low-fluence laser ablation of graphite in vacuum is investigated experimentally and by direct Monte Carlo simulations in an attempt to explain hyperthermal particle energies for thermally vaporized materials. We demonstrate that the translation energy of neutral particles, ∼2 times higher than classical expectations, is due to two effects, hydrodynamic plume acceleration into the forward direction and kinetic selection of fast particles in the on-axis region. Both effects depend on the collision number within the plume and on the particles internal degrees of freedom. The simulations allow ablation properties to be evaluated, such as ablation rate and surface temperature, based on time-of-flight measurements. Available experimental data on kinetic energies of various laser-produced particles are well described by the presented model.

Authors:
;  [1]
  1. Kutateladze Institute of Thermophysics, Lavrentyev Ave. 1, Novosibirsk 630090 (Russian Federation)
Publication Date:
OSTI Identifier:
22420286
Resource Type:
Journal Article
Journal Name:
Applied Physics Letters
Additional Journal Information:
Journal Volume: 106; Journal Issue: 5; Other Information: (c) 2015 AIP Publishing LLC; Country of input: International Atomic Energy Agency (IAEA); Journal ID: ISSN 0003-6951
Country of Publication:
United States
Language:
English
Subject:
71 CLASSICAL AND QUANTUM MECHANICS, GENERAL PHYSICS; COMPUTERIZED SIMULATION; DEGREES OF FREEDOM; EVAPORATION; GRAPHITE; LASERS; MONTE CARLO METHOD; PLASMA ACCELERATION; SURFACES; TIME-OF-FLIGHT METHOD

Citation Formats

Morozov, A. A., Evtushenko, A. B., Bulgakov, A. V., E-mail: bulgakov@itp.nsc.ru, and EaStCHEM, School of Chemistry, University of Edinburgh, Edinburgh EH9 3FJ. Gas-dynamic acceleration of laser-ablation plumes: Hyperthermal particle energies under thermal vaporization. United States: N. p., 2015. Web. doi:10.1063/1.4907703.
Morozov, A. A., Evtushenko, A. B., Bulgakov, A. V., E-mail: bulgakov@itp.nsc.ru, & EaStCHEM, School of Chemistry, University of Edinburgh, Edinburgh EH9 3FJ. Gas-dynamic acceleration of laser-ablation plumes: Hyperthermal particle energies under thermal vaporization. United States. https://doi.org/10.1063/1.4907703
Morozov, A. A., Evtushenko, A. B., Bulgakov, A. V., E-mail: bulgakov@itp.nsc.ru, and EaStCHEM, School of Chemistry, University of Edinburgh, Edinburgh EH9 3FJ. 2015. "Gas-dynamic acceleration of laser-ablation plumes: Hyperthermal particle energies under thermal vaporization". United States. https://doi.org/10.1063/1.4907703.
@article{osti_22420286,
title = {Gas-dynamic acceleration of laser-ablation plumes: Hyperthermal particle energies under thermal vaporization},
author = {Morozov, A. A. and Evtushenko, A. B. and Bulgakov, A. V., E-mail: bulgakov@itp.nsc.ru and EaStCHEM, School of Chemistry, University of Edinburgh, Edinburgh EH9 3FJ},
abstractNote = {The expansion of a plume produced by low-fluence laser ablation of graphite in vacuum is investigated experimentally and by direct Monte Carlo simulations in an attempt to explain hyperthermal particle energies for thermally vaporized materials. We demonstrate that the translation energy of neutral particles, ∼2 times higher than classical expectations, is due to two effects, hydrodynamic plume acceleration into the forward direction and kinetic selection of fast particles in the on-axis region. Both effects depend on the collision number within the plume and on the particles internal degrees of freedom. The simulations allow ablation properties to be evaluated, such as ablation rate and surface temperature, based on time-of-flight measurements. Available experimental data on kinetic energies of various laser-produced particles are well described by the presented model.},
doi = {10.1063/1.4907703},
url = {https://www.osti.gov/biblio/22420286}, journal = {Applied Physics Letters},
issn = {0003-6951},
number = 5,
volume = 106,
place = {United States},
year = {Mon Feb 02 00:00:00 EST 2015},
month = {Mon Feb 02 00:00:00 EST 2015}
}