Extreme ultraviolet emission from dense plasmas generated with sub-10-fs laser pulses

J. Osterholz, F. Brandl, M. Cerchez, T. Fischer, D. Hemmers, B. Hidding, A. Pipahl, G. Pretzler, S. J. Rose, O. Willi

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Abstract

The extreme ultraviolet (XUV) emission from dense plasmas generated with sub- 10-fs laser pulses with varying peak intensities up to 3× 1016 W cm2 is investigated for different target materials. K shell spectra are obtained from low Z targets (carbon and boron nitride). In the spectra, a series limit for the hydrogen- and helium-like resonance lines is observed, indicating that the plasma is at high density and that pressure ionization has removed the higher levels. In addition, L shell spectra from titanium targets were obtained. Basic features of the K and L shell spectra are reproduced with computer simulations. The calculations include hydrodynamic simulation of the plasma expansion and collisional radiative calculations of the XUV emission.

Original languageEnglish
Article number103301
Number of pages7
JournalPhysics of Plasmas
Volume15
Issue number10
DOIs
Publication statusPublished - 6 Nov 2008

Keywords

  • extreme ultraviolet emissions
  • dense plasmas
  • laser pulses
  • intense subpicosecond laser pulses
  • laser energy

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