Laser diffraction effects on the Rayleigh-Taylor instability of a radiation pressure accelerated thin foil

Research output: Contribution to conferenceAbstract

Abstract

We derive a theoretical model for the Rayleigh-Taylor (RT)-like instability for a thin foil accelerated by an intense laser, taking into account finite wavelength effects in the laser wave field. The latter leads to the diffraction of the electromagnetic wave off the periodic structures arising from the instability of the foil, which significantly modifies the growth rate of the RT-like instability when the perturbations on the foil have wavenumbers comparable to or larger than the laser wavenumber.

In particular, the growth rate has a local maximum at a perturbation wavenumber approximately equal to the laser wavenumber. This is due to resonant excitations of surface waves parallel to the foil [2]. The standard RT instability, arising from a pressure difference between the two sides of a foil, is approximately recovered for perturbation wavenumbers smaller than the laser wavenumber. Differences in the results for circular and linear polarization of the laser light are pointed out. The model has significance to radiation pressure acceleration of thin foils, where RT-like instabilities are significant obstacles.
LanguageEnglish
PagesP1.222
Number of pages1
Publication statusPublished - 26 Jun 2015
Event42nd EPS Conference on Plasma Physics - Centro Cultural de Belém, Lisbon, Portugal
Duration: 22 Jun 201526 Jun 2015

Conference

Conference42nd EPS Conference on Plasma Physics
CountryPortugal
CityLisbon
Period22/06/1526/06/15

Fingerprint

Taylor instability
radiation pressure
foils
diffraction
lasers
perturbation
circular polarization
linear polarization
surface waves
electromagnetic radiation
wavelengths
excitation

Keywords

  • laser diffraction effects
  • Rayleigh-Taylor instability
  • radiation pressure
  • thin foil

Cite this

Eliasson, B. (2015). Laser diffraction effects on the Rayleigh-Taylor instability of a radiation pressure accelerated thin foil. P1.222. Abstract from 42nd EPS Conference on Plasma Physics, Lisbon, Portugal.
Eliasson, B. / Laser diffraction effects on the Rayleigh-Taylor instability of a radiation pressure accelerated thin foil. Abstract from 42nd EPS Conference on Plasma Physics, Lisbon, Portugal.1 p.
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abstract = "We derive a theoretical model for the Rayleigh-Taylor (RT)-like instability for a thin foil accelerated by an intense laser, taking into account finite wavelength effects in the laser wave field. The latter leads to the diffraction of the electromagnetic wave off the periodic structures arising from the instability of the foil, which significantly modifies the growth rate of the RT-like instability when the perturbations on the foil have wavenumbers comparable to or larger than the laser wavenumber.In particular, the growth rate has a local maximum at a perturbation wavenumber approximately equal to the laser wavenumber. This is due to resonant excitations of surface waves parallel to the foil [2]. The standard RT instability, arising from a pressure difference between the two sides of a foil, is approximately recovered for perturbation wavenumbers smaller than the laser wavenumber. Differences in the results for circular and linear polarization of the laser light are pointed out. The model has significance to radiation pressure acceleration of thin foils, where RT-like instabilities are significant obstacles.",
keywords = "laser diffraction effects, Rayleigh-Taylor instability, radiation pressure, thin foil",
author = "B. Eliasson",
note = "Abstract for Poster presented on 22/6/2015.; 42nd EPS Conference on Plasma Physics ; Conference date: 22-06-2015 Through 26-06-2015",
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Eliasson, B 2015, 'Laser diffraction effects on the Rayleigh-Taylor instability of a radiation pressure accelerated thin foil' 42nd EPS Conference on Plasma Physics, Lisbon, Portugal, 22/06/15 - 26/06/15, pp. P1.222.

Laser diffraction effects on the Rayleigh-Taylor instability of a radiation pressure accelerated thin foil. / Eliasson, B.

2015. P1.222 Abstract from 42nd EPS Conference on Plasma Physics, Lisbon, Portugal.

Research output: Contribution to conferenceAbstract

TY - CONF

T1 - Laser diffraction effects on the Rayleigh-Taylor instability of a radiation pressure accelerated thin foil

AU - Eliasson, B.

N1 - Abstract for Poster presented on 22/6/2015.

PY - 2015/6/26

Y1 - 2015/6/26

N2 - We derive a theoretical model for the Rayleigh-Taylor (RT)-like instability for a thin foil accelerated by an intense laser, taking into account finite wavelength effects in the laser wave field. The latter leads to the diffraction of the electromagnetic wave off the periodic structures arising from the instability of the foil, which significantly modifies the growth rate of the RT-like instability when the perturbations on the foil have wavenumbers comparable to or larger than the laser wavenumber.In particular, the growth rate has a local maximum at a perturbation wavenumber approximately equal to the laser wavenumber. This is due to resonant excitations of surface waves parallel to the foil [2]. The standard RT instability, arising from a pressure difference between the two sides of a foil, is approximately recovered for perturbation wavenumbers smaller than the laser wavenumber. Differences in the results for circular and linear polarization of the laser light are pointed out. The model has significance to radiation pressure acceleration of thin foils, where RT-like instabilities are significant obstacles.

AB - We derive a theoretical model for the Rayleigh-Taylor (RT)-like instability for a thin foil accelerated by an intense laser, taking into account finite wavelength effects in the laser wave field. The latter leads to the diffraction of the electromagnetic wave off the periodic structures arising from the instability of the foil, which significantly modifies the growth rate of the RT-like instability when the perturbations on the foil have wavenumbers comparable to or larger than the laser wavenumber.In particular, the growth rate has a local maximum at a perturbation wavenumber approximately equal to the laser wavenumber. This is due to resonant excitations of surface waves parallel to the foil [2]. The standard RT instability, arising from a pressure difference between the two sides of a foil, is approximately recovered for perturbation wavenumbers smaller than the laser wavenumber. Differences in the results for circular and linear polarization of the laser light are pointed out. The model has significance to radiation pressure acceleration of thin foils, where RT-like instabilities are significant obstacles.

KW - laser diffraction effects

KW - Rayleigh-Taylor instability

KW - radiation pressure

KW - thin foil

UR - http://www.ipfn.ist.utl.pt/EPS2015/

M3 - Abstract

SP - P1.222

ER -

Eliasson B. Laser diffraction effects on the Rayleigh-Taylor instability of a radiation pressure accelerated thin foil. 2015. Abstract from 42nd EPS Conference on Plasma Physics, Lisbon, Portugal.