Precision X-ray spectroscopy of intense laser-plasma interactions
- 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.
DOIAbstract
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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