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High brightness keV harmonics from relativistically oscillating plasma surfaces

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  • B. Dromey
  • D. Adams
  • S. Kar
  • C. Bellei
  • D. C. Carroll
  • R. J. Clarke
  • J. S. Green
  • S. Kneip
  • K. Markey
  • S. R. Nagel
  • P. T. Simpson
  • L. Willingale
  • P. McKenna
  • D. Neely
  • Z. Najmudin
  • K. Krushelnick
  • P. A. Norreys
  • M. Zepf
<mark>Journal publication date</mark>08/2009
<mark>Journal</mark>European Physical Journal - Special Topics
Issue number1
Number of pages4
Pages (from-to)57-60
Publication StatusPublished
Early online date14/08/09
<mark>Original language</mark>English


X-ray harmonic radiation extending to 3.3 angstrom, 3.8 keV from Petawatt class laser-solid interactions is presented. The harmonic spectra display a relativistic limit scaling up to similar to 3000th order, above which an intensity dependent scaling roll-over is observed. Highly directional beamed emission for harmonic photon energy h nu > 1 keV is found to be into a cone angle