Tunable mega-ampere electron current propagation in solids by dynamic control of lattice melt

David MacLellan, David Carroll, Ross Gray, Nicola Booth, Matthias Burza, M. P. Desjarlais, F Du, David Neely, Haydn Powell, A.P.L. Robinson, Graeme Gordon Scott, Xiaohui Yuan, C. -G. Wahlstrom, Paul McKenna

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The influence of lattice-melt-induced resistivity gradients on the transport of mega-ampere currents of fast electrons in solids is investigated numerically and experimentally using laser-accelerated protons to induce isochoric heating. Tailoring the heating profile enables the resistive magnetic fields which strongly influence the current propagation to be manipulated. This tunable laser-driven process enables important fast electron beam properties, including the beam divergence, profile and symmetry, to be actively tailored, and without recourse to complex target manufacture.
Original languageEnglish
Article number185001
Number of pages5
JournalPhysical Review Letters
Issue number18
Publication statusPublished - 31 Oct 2014


  • lattice-melt-induced resistivity gradients
  • mega-ampere currents
  • fast electrons

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