Precision X-ray spectroscopy of intense laser-plasma interactions

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Woolsey, N. C. ; Clarke, R. J. ; Doria, D. ; Gizzi, L. A. ; Gregori, G. ; Hakel, P. ; Hansen, S. B. ; Koester, P. ; Labate, L. ; Levato, T. ; Li, B. ; Makita, M. ; Mancini, R. C. ; Pasley, J. ; Rajeev, P. P. ; Robinson, A. P. L. ; Wagenaars, E. ; Waugh, J. N. ; Booth, N. (2011)
  • Subject: 3108 | 3106

Polarisation sensitive emission spectroscopy measurements are reported for a petawatt laser-solid target interaction at intensities up to 5 x 10(20) Wcm(-2). These measurements were single-shot and used pairs of highly-orientated graphite spectrometers to resolve the sulphur Ly-alpha doublet. The sulphur Ly-alpha(1) component shows a large positive polarisation indicative of a low energy electron beam in the plasma, the Ly-alpha(2) component acts as a cross-spectrometer calibration. The measurements show a significant anisotropic or beam-like component to a cold return current. (C) 2011 Elsevier B.V. All rights reserved.
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