### Abstract

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.

Language | English |
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Pages | P1.222 |

Number of pages | 1 |

Publication status | Published - 26 Jun 2015 |

Event | 42nd EPS Conference on Plasma Physics - Centro Cultural de Belém, Lisbon, Portugal Duration: 22 Jun 2015 → 26 Jun 2015 |

### Conference

Conference | 42nd EPS Conference on Plasma Physics |
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Country | Portugal |

City | Lisbon |

Period | 22/06/15 → 26/06/15 |

### Fingerprint

### Keywords

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

### Cite this

*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.

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

Research output: Contribution to conference › Abstract

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 -