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Weak collisionless shocks in laser-plasmas

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Lisbonrevised_1.pdf (194.0Kb)
Date
04/2015
Author
Cairns, R. A.
Bingham, R.
Trines, R. G. M.
Norreys, P.
Funder
EPSRC
Grant ID
EP/J018171/1
Keywords
Laser plasma
Collisionless shock
Ion acceleration
QC Physics
NDAS
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Abstract
We obtain a theory describing laminar shock-like structures in a collisionless plasma and examine the parameter limits, in terms of the ion sound Mach number and the electron/ion temperature ratio, within which these structures exist. The essential feature is the inclusion of finite ion temperature with the result that some ions are reflected from a potential ramp. This destroys the symmetry between upstream and downstream regions that would otherwise give the well-known ion solitary wave solution. We have shown earlier (Cairns et al 2014 Phys. Plasmas 21 022112) that such structures may be relevant to problems such as the existence of strong, localized electric fields observed in laser compressed pellets and laser acceleration of ions. Here we present results on the way in which these structures may produce species separation in fusion targets and suggest that it may be possible to use shock ion acceleration for fast ignition.
Citation
Cairns , R A , Bingham , R , Trines , R G M & Norreys , P 2015 , ' Weak collisionless shocks in laser-plasmas ' , Plasma Physics and Controlled Fusion , vol. 57 , no. 4 , 044008 . https://doi.org/10.1088/0741-3335/57/4/044008
Publication
Plasma Physics and Controlled Fusion
Status
Peer reviewed
DOI
https://doi.org/10.1088/0741-3335/57/4/044008
ISSN
0741-3335
Type
Journal article
Rights
© 2015 IOP Publishing Ltd.
Collections
  • University of St Andrews Research
URI
http://hdl.handle.net/10023/8442

Items in the St Andrews Research Repository are protected by copyright, with all rights reserved, unless otherwise indicated.

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