Applied Physics B

, Volume 77, Issue 1, pp 49–57

High-repetition-rate hard X-ray generation with sub-millijoule femtosecond laser pulses

  • M. Hagedorn
  • J. Kutzner
  • G. Tsilimis
  • H. Zacharias
Regular Paper

Abstract

Hard X-ray radiation is generated at 1-kHz repetition rate on metal targets using 30-fs sub-millijoule laser pulses. Spinning-disc targets of medium-Z (Ti, Cr, Fe, Ni, Cu, Zn and Mo) and high-Z (Ta) metals are investigated. For medium-Z targets, characteristic K-shell emission (Kα and Kβ) is observed in the 4–20 keV energy range in addition to a broadband bremsstrahlung background. Whereas in former studies similar results have been obtained by applying laser pulses in the tens-to-hundreds-of-millijoules range, we observe characteristic X-ray generation even at applied pulse energies as low as 100 μJ. The well-defined emission wavelength, the high intensity and the high brightness of this radiation makes this source a promising tool for time-resolved experiments with high-repetition-rate (≥10 kHz) small-scale table-top laser systems .

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Copyright information

© Springer-Verlag 2003

Authors and Affiliations

  • M. Hagedorn
    • 1
  • J. Kutzner
    • 1
  • G. Tsilimis
    • 1
  • H. Zacharias
    • 1
  1. 1.Physikalisches InstitutWestfälische Wilhelms UniversitätMünsterGermany

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