High brightness kev harmonics from relativistically oscillating plasma surfaces

B. Dromey, D. Adams, S. Kar, C. Bellei, D.C. Carroll, R.J. Clarke, J.S. Green, S. Kneip, Paul Mckenna

Research output: Contribution to journalArticlepeer-review


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 <4 degrees, significantly less than that of the incident laser cone (20 degrees).
Original languageEnglish
Pages (from-to)57-60
Number of pages3
JournalEuropean Physical Journal - Special Topics
Issue number1
Publication statusPublished - 14 Aug 2009


  • laser-pulse
  • generation
  • intensity


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