Energy exchange via multi-species streaming in laser-driven ion acceleration

M. King; R. J. Gray; H. W. Powell; R. Capdessus; P. McKenna

Energy exchange via multi-species streaming in laser-driven ion acceleration

M. King, R. J. Gray, H. W. Powell, R. Capdessus, P. McKenna

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Abstract

Due to the complex electron dynamics and multiple ion acceleration mechanisms that can take place in the interaction of an ultra-intense laser pulse with a thin foil, it is possible for multiple charged particle populations to overlap in space with varying momentum distributions. In certain scenarios this can drive streaming instabilities such as the relativistic Buneman instability and the ion-ion acoustic instability. The potential for such instabilities to occur are demonstrated using particle-in-cell simulations. It is shown that if a population of ions can be accelerated such that it can propagate through other slowly expanding ion populations, energy exchange can occur via the ion-ion acoustic instability.

Original language	English
Number of pages	8
Journal	Plasma Physics and Controlled Fusion
Publication status	Accepted/In press - 9 Aug 2016

Keywords

plasma instabilities
laser plasma interaction
laser plasma acceleration
ion acceleration
electron dynamics
laser pulse
particle-in-cell simulations
ion-ion acoustic instability

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King-etal-PPCF2016-Energy-exchange-via-multi-species-streamingAccepted author manuscript, 5.84 MB

http://iopscience.iop.org/journal/0741-3335

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King, M., Gray, R. J., Powell, H. W., Capdessus, R., & McKenna, P. (Accepted/In press). Energy exchange via multi-species streaming in laser-driven ion acceleration. Plasma Physics and Controlled Fusion.

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abstract = "Due to the complex electron dynamics and multiple ion acceleration mechanisms that can take place in the interaction of an ultra-intense laser pulse with a thin foil, it is possible for multiple charged particle populations to overlap in space with varying momentum distributions. In certain scenarios this can drive streaming instabilities such as the relativistic Buneman instability and the ion-ion acoustic instability. The potential for such instabilities to occur are demonstrated using particle-in-cell simulations. It is shown that if a population of ions can be accelerated such that it can propagate through other slowly expanding ion populations, energy exchange can occur via the ion-ion acoustic instability.",

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AU - Powell, H. W.

AU - Capdessus, R.

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KW - plasma instabilities

KW - laser plasma interaction

KW - laser plasma acceleration

KW - ion acceleration

KW - electron dynamics

KW - laser pulse

KW - particle-in-cell simulations

KW - ion-ion acoustic instability

UR - http://iopscience.iop.org/journal/0741-3335

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JO - Plasma Physics and Controlled Fusion

JF - Plasma Physics and Controlled Fusion

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