Plume expansion of a laser-induced plasma studied with the particle-in-cell method.

Ole Ellegaard, T Nedela, H Urbassek, J Schou

Publikation: Bidrag til tidsskriftTidsskriftartikelForskningpeer review

Resumé

Udgivelsesdato: 30/9
OriginalsprogEngelsk
TidsskriftApplied Surface Science
Vol/bind197
Sider (fra-til)229
Antal sider238
ISSN0169-4332
StatusUdgivet - 30. sep. 2002

Fingeraftryk

Plasmas
Lasers
Ions
Electrons
Ablation
Potential energy
Velocity distribution
Kinetic energy
Energy transfer
Distribution functions
Carrier concentration
Vacuum
Fluids
Temperature

Emneord

  • laser forstøvning, plasma ekspansion, plasma simulation, particle-in-cell metoden

Citer dette

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title = "Plume expansion of a laser-induced plasma studied with the particle-in-cell method.",
abstract = " The initial stage of laser-induced plasma plume expansion from a solid in vacuum and the effect of the Coulomb field have been studied. We have performed a one-dimensional numerical calculation by mapping the charge on a computational grid according to the particle-in-cell (PIC) method of Birdsall et al. It is assumed that the particle ablation from a surface with a fixed temperature takes place as a pulse, i.e. within a finite period of time. A number of characteristic quantities for the plasma plume are compared with similar data for expansion of neutrals as well as fluid models: Density profiles n(x, t), velocity distributions of ions u(x, t), distribution functions for velocities F(nu(x)) of ions or electrons as well as the time dependence of kinetic energy E-kin(t) for both type of particles. We found a significant increase in the velocities of the ions at the expense of field potential energy as well as electron energy. We have estimated the time constant for energy transfer between the electrons and the ions. The scaling of these processes is given by a single parameter determined by the Debye length obtained from the electron density in the plasma outside the surface",
keywords = "laser forst{\o}vning, plasma ekspansion, plasma simulation, particle-in-cell metoden, Laser ablation; plasma expansion; plasma simulation; particle-in-cell method",
author = "Ole Ellegaard and T Nedela and H Urbassek and J Schou",
year = "2002",
month = "9",
day = "30",
language = "English",
volume = "197",
pages = "229",
journal = "Applied Surface Science",
issn = "0169-4332",
publisher = "Elsevier",

}

Plume expansion of a laser-induced plasma studied with the particle-in-cell method. / Ellegaard, Ole; Nedela, T; Urbassek, H; Schou, J.

I: Applied Surface Science, Bind 197, 30.09.2002, s. 229.

Publikation: Bidrag til tidsskriftTidsskriftartikelForskningpeer review

TY - JOUR

T1 - Plume expansion of a laser-induced plasma studied with the particle-in-cell method.

AU - Ellegaard, Ole

AU - Nedela, T

AU - Urbassek, H

AU - Schou, J

PY - 2002/9/30

Y1 - 2002/9/30

N2 -  The initial stage of laser-induced plasma plume expansion from a solid in vacuum and the effect of the Coulomb field have been studied. We have performed a one-dimensional numerical calculation by mapping the charge on a computational grid according to the particle-in-cell (PIC) method of Birdsall et al. It is assumed that the particle ablation from a surface with a fixed temperature takes place as a pulse, i.e. within a finite period of time. A number of characteristic quantities for the plasma plume are compared with similar data for expansion of neutrals as well as fluid models: Density profiles n(x, t), velocity distributions of ions u(x, t), distribution functions for velocities F(nu(x)) of ions or electrons as well as the time dependence of kinetic energy E-kin(t) for both type of particles. We found a significant increase in the velocities of the ions at the expense of field potential energy as well as electron energy. We have estimated the time constant for energy transfer between the electrons and the ions. The scaling of these processes is given by a single parameter determined by the Debye length obtained from the electron density in the plasma outside the surface

AB -  The initial stage of laser-induced plasma plume expansion from a solid in vacuum and the effect of the Coulomb field have been studied. We have performed a one-dimensional numerical calculation by mapping the charge on a computational grid according to the particle-in-cell (PIC) method of Birdsall et al. It is assumed that the particle ablation from a surface with a fixed temperature takes place as a pulse, i.e. within a finite period of time. A number of characteristic quantities for the plasma plume are compared with similar data for expansion of neutrals as well as fluid models: Density profiles n(x, t), velocity distributions of ions u(x, t), distribution functions for velocities F(nu(x)) of ions or electrons as well as the time dependence of kinetic energy E-kin(t) for both type of particles. We found a significant increase in the velocities of the ions at the expense of field potential energy as well as electron energy. We have estimated the time constant for energy transfer between the electrons and the ions. The scaling of these processes is given by a single parameter determined by the Debye length obtained from the electron density in the plasma outside the surface

KW - laser forstøvning, plasma ekspansion, plasma simulation, particle-in-cell metoden

KW - Laser ablation; plasma expansion; plasma simulation; particle-in-cell method

M3 - Journal article

VL - 197

SP - 229

JO - Applied Surface Science

JF - Applied Surface Science

SN - 0169-4332

ER -