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Large-amplitude plasma waves and 2ωp emission driven by laser-generated electron jets in overdense plasma layers

Published online by Cambridge University Press:  25 March 2004

Th. KUNZL ,
R. LICHTERS  and
J. MEYER-TER-VEHN
Th. KUNZL
Affiliation:
Max-Planck-Institut für Quantenoptik, Garching, Germany
R. LICHTERS
Affiliation:
Max-Planck-Institut für Quantenoptik, Garching, Germany
J. MEYER-TER-VEHN
Affiliation:
Max-Planck-Institut für Quantenoptik, Garching, Germany
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Abstract

The excitation of large-amplitude plasma waves by intense few-cycle laser pulses in thin overdense plasma layers is studied using one-dimensional particle-in-cell simulation. P-polarized pulses generate relativistic electron pulses (jets) at the irradiated surface that penetrate the layer and then oscillate back and forth due to reflection by self-generated space charge fields building up in front of the surfaces. Counterpropagating plasmons of large amplitude are excited and start to emit radiation at 2ωp and other harmonics of the plasma frequency. The analogy to type III solar radio emission that is driven by electron bursts from deeper layers of the solar corona is pointed out; it highlights the present topic as another example of laboratory astrophysics with lasers.

Keywords

2ωp radiationFew-cycle laser pulsesLarge amplitude plasma wavesRelativistic electron jets
Type
Research Article
Information
Laser and Particle Beams , Volume 21 , Issue 4 , October 2003 , pp. 583 - 591
Copyright
© 2003 Cambridge University Press

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