Plasma scale-length effects on electron energy spectra in high-irradiance laser plasmas

O. Culfa, G. J. Tallents, A. K. Rossall, E. Wagenaars, C. P. Ridgers, C. D. Murphy, R. J. Dance, R. J. Gray, P. McKenna, C. D R Brown, S. F. James, D. J. Hoarty, Christopher Neal Booth, A. P L Robinson, K. L. Lancaster, S. A. Pikuz, A. Ya Faenov, T. Kampfer, K. S. Schulze, I. UschmannN. C. Woolsey

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Abstract

An analysis of an electron spectrometer used to characterize fast electrons generated by ultraintense (1020Wcm-2) laser interaction with a preformed plasma of scale length measured by shadowgraphy is presented. The effects of fringing magnetic fields on the electron spectral measurements and the accuracy of density scale-length measurements are evaluated. 2D EPOCH PIC code simulations are found to be in agreement with measurements of the electron energy spectra showing that laser filamentation in plasma preformed by a prepulse is important with longer plasma scale lengths (>8 μm).

Original languageEnglish
Article number043201
JournalPhysical Review E - Statistical, Nonlinear, and Soft Matter Physics
Volume93
Issue number4
DOIs
Publication statusPublished - 6 Apr 2016
Externally publishedYes

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