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Evidence of locally enhanced target heating due to instabilities of counter-streaming fast electron beams

Koester, P, Booth, N, Cecchetti, CA, Chen, H, Evans, RG, Gregori, G, Labate, L, Levato, T, Li, B, Makita, M, Mithen, J, Murphy, CD, Notley, M, Pattathil, R, Riley, D, Woolsey, N and Gizzi, LA (2015) Evidence of locally enhanced target heating due to instabilities of counter-streaming fast electron beams Physics of Plasmas, 22 (2).

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Abstract

© 2015 AIP Publishing LLC.The high-current fast electron beams generated in high-intensity laser-solid interactions require the onset of a balancing return current in order to propagate in the target material. Such a system of counter-streaming electron currents is unstable to a variety of instabilities such as the current-filamentation instability and the two-stream instability. An experimental study aimed at investigating the role of instabilities in a system of symmetrical counter-propagating fast electron beams is presented here for the first time. The fast electron beams are generated by double-sided laser-irradiation of a layered target foil at laser intensities above 1019W/cm2. High-resolution X-ray spectroscopy of the emission from the central Ti layer shows that locally enhanced energy deposition is indeed achieved in the case of counter-propagating fast electron beams.

Item Type: Article
Authors :
NameEmailORCID
Koester, PUNSPECIFIEDUNSPECIFIED
Booth, NUNSPECIFIEDUNSPECIFIED
Cecchetti, CAUNSPECIFIEDUNSPECIFIED
Chen, HUNSPECIFIEDUNSPECIFIED
Evans, RGUNSPECIFIEDUNSPECIFIED
Gregori, GUNSPECIFIEDUNSPECIFIED
Labate, LUNSPECIFIEDUNSPECIFIED
Levato, TUNSPECIFIEDUNSPECIFIED
Li, BUNSPECIFIEDUNSPECIFIED
Makita, MUNSPECIFIEDUNSPECIFIED
Mithen, Jj.mithen@surrey.ac.ukUNSPECIFIED
Murphy, CDUNSPECIFIEDUNSPECIFIED
Notley, MUNSPECIFIEDUNSPECIFIED
Pattathil, RUNSPECIFIEDUNSPECIFIED
Riley, DUNSPECIFIEDUNSPECIFIED
Woolsey, NUNSPECIFIEDUNSPECIFIED
Gizzi, LAUNSPECIFIEDUNSPECIFIED
Date : 1 February 2015
Identification Number : https://doi.org/10.1063/1.4907195
Depositing User : Symplectic Elements
Date Deposited : 17 May 2017 13:34
Last Modified : 17 May 2017 13:34
URI: http://epubs.surrey.ac.uk/id/eprint/839724

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