Applied Physics B

, Volume 77, Issue 1, pp 49–57

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

Authors

  • M. Hagedorn
    • Physikalisches InstitutWestfälische Wilhelms Universität
    • Physikalisches InstitutWestfälische Wilhelms Universität
  • G. Tsilimis
    • Physikalisches InstitutWestfälische Wilhelms Universität
  • H. Zacharias
    • Physikalisches InstitutWestfälische Wilhelms Universität
Regular Paper

DOI: 10.1007/s00340-003-1226-3

Cite this article as:
Hagedorn, M., Kutzner, J., Tsilimis, G. et al. Appl. Phys. B (2003) 77: 49. doi:10.1007/s00340-003-1226-3

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 .

Copyright information

© Springer-Verlag 2003