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High brightness keV harmonics from relativistically oscillating plasma surfaces

Abstract

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°).

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Correspondence to B. Dromey.

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Dromey, B., Adams, D., Kar, S. et al. High brightness keV harmonics from relativistically oscillating plasma surfaces. Eur. Phys. J. Spec. Top. 175, 57–60 (2009). https://doi.org/10.1140/epjst/e2009-01117-4

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  • DOI: https://doi.org/10.1140/epjst/e2009-01117-4

Keywords

  • European Physical Journal Special Topic
  • Relativistic Limit
  • Solid Target
  • Harmonic Order
  • Harmonic Spectrum