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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 : 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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