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

Osterholz, J. and Brandl, F. and Cerchez, M. and Fischer, T. and Hemmers, D. and Hidding, B. and Pipahl, A. and Pretzler, G. and Rose, S. J. and Willi, O. (2008) Extreme ultraviolet emission from dense plasmas generated with sub-10-fs laser pulses. Physics of Plasmas, 15 (10). 103301. ISSN 1070-664X

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    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.

    ORCID iDs

    Osterholz, J., Brandl, F., Cerchez, M., Fischer, T., Hemmers, D., Hidding, B. ORCID logoORCID: https://orcid.org/0000-0002-5827-0041, Pipahl, A., Pretzler, G., Rose, S. J. ORCID logoORCID: https://orcid.org/0000-0001-5608-5208 and Willi, O.;