Intense high-contrast femtosecond K-shell X-ray source from laser-driven ar clusters

L.M. Chen, F. Liu, W.M. Wang, M. Kando, J.Y. Mao, L. Zhang, J.L. Ma, Y. T. Li, S. V. Bulanov, T. Tajima, Y. Kato, Zheng-Ming Sheng, Z.Y. Wei, J. Zhang

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Bright Ar quasimonochromatic K-shell x ray with very little background has been generated using an Ar clustering gas jet target irradiated with a 30 fs ultrahigh-contrast laser, with a measured flux of 2.2×1011  photons/J into 4π. This intense x-ray source critically depends on the laser contrast and intensity. The optimization of source output with interaction length is addressed. Simulations point to a nonlinear resonant mechanism of electron heating during the early stage of laser interaction, resulting in enhanced x-ray emission. The x-ray pulse duration is expected to be only 10 fs, opening the possibility for single-shot ultrafast keV x-ray imaging applications.
Original languageEnglish
Article number215004
Number of pages4
JournalPhysical Review Letters
Publication statusPublished - 28 May 2010


  • intense
  • high-contrast
  • femtosecond K-shell X-ray source
  • laser-driven ar clusters


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