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, K. Markey, S. R. Nagel, P. T. Simpson, L. Willingale, P. McKenna, D. Neely, Z. Najmudin, K. Krushelnick, P. A. Norreys, M. Zepf

Research output: Contribution to journalArticlepeer-review


X-ray harmonic radiation extending to 3.3 Å, 3.8 keV from Petawatt class laser-solid interactions is presented. The harmonic spectra display a relativistic limit scaling up to ~3000th order, above which an intensity dependent scaling roll-over is observed. Highly directional beamed emission for harmonic photon energy hν > 1 keV is found to be into a cone angle <4°, significantly less than that of the incident laser cone (20°).
Original languageEnglish
Pages (from-to)57-60
Number of pages4
Issue number1
Publication statusPublished - 14 Aug 2009

ASJC Scopus subject areas

  • Physics and Astronomy(all)
  • Materials Science(all)
  • Physical and Theoretical Chemistry


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