Enhancement of plasma wakefield generation and self-compression of femtosecond laser pulses by ionization gradients

He, Z-H and Nees, J. A. and Hou, B. and Krushelnick, K. and Thomas, A. G. R. (2014) Enhancement of plasma wakefield generation and self-compression of femtosecond laser pulses by ionization gradients. Plasma Physics and Controlled Fusion, 56 (8). ISSN 0741-3335

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Abstract

As lasers become progressively higher in power, optical damage thresholds will become a limiting factor. Using the non-linear optics of plasma may be a way to circumvent these limits. In this paper, we report on simulations showing an enhancement to plasma wakefield self-compression of femtosecond laser pulses due to an ionization gradient at the leading edge of the pulse. By operating in a regime where wakefield generation is driven by moderately relativistic (similar to 10(18) W cm(-2)) laser pulses and proper choice of gas species, the ionization front of the pulse can lead to a frequency shift that enhances the ponderomotive force and therefore both the wakefield generation and subsequent pulse compression.

Item Type:
Journal Article
Journal or Publication Title:
Plasma Physics and Controlled Fusion
Uncontrolled Keywords:
/dk/atira/pure/subjectarea/asjc/3100/3104
Subjects:
ID Code:
82763
Deposited By:
Deposited On:
09 Nov 2016 16:24
Refereed?:
Yes
Published?:
Published
Last Modified:
23 Jan 2020 03:34