Sergei V. Bobashev

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Exceptional behavior of light-matter interaction in the extreme ultraviolet is demonstrated. The photoionization of different rare gases was compared at the free-electron laser in Hamburg, FLASH, by applying ion spectroscopy at the wavelength of 13.7 nm and irradiance levels of thousands of terawatts per square centimeter. In the case of xenon, the degree(More)
In the spectral range of the extreme ultraviolet at a wavelength of 13.3 nm, we have studied the photoionization of xenon at ultrahigh intensities. For our ion mass-to-charge spectroscopy experiments, irradiance levels from 10(12) to 10(16) W cm(-2) were achieved at the new free-electron laser in Hamburg FLASH by strong beam focusing with the aid of a(More)
K. Tiedtke, J. Feldhaus, U. Hahn, U. Jastrow, T. Nunez, T. Tschentscher, S. V. Bobashev, A. A. Sorokin, J. B. Hastings, S. Möller, L. Cibik, A. Gottwald, A. Hoehl, U. Kroth, M. Krumrey, H. Schöppe, G. Ulm, and M. Richter Deutsches Elektronen-Synchrotron, Notkestraße 85, 22603 Hamburg, Germany Ioffe Physico-Technical Institute, Polytekhnicheskaya 26, 194021(More)
A. A. Sorokin, M. Wellhöfer, S. V. Bobashev, K. Tiedtke, and M. Richter Physikalisch-Technische Bundesanstalt, Abbestraße 2-12, D-10587 Berlin, Germany Ioffe Physico-Technical Institute, Polytekhnicheskaya 26, 194021 St. Petersburg, Russia Universität Hamburg, Luruper Chaussee 149, D-22761 Hamburg, Germany Deutsches Elektronen-Synchrotron, Notkestraße 85,(More)
The purpose of the investigations was further validation of the formulated mathematical model and algorithm as well as revealing and the analysis of major factors determining the MHD impact on the flow. The effect of the magnetic field induced by the coil built-in the body on the plasma flow was investigated and the efficiency of the MHD interaction was(More)
At the new Free-electron LASer in Hamburg FLASH, we have studied photon-matter interaction by means of ion time-of-flight spectroscopy on gases in the soft X-ray regime. Emphasis was laid on the quantitative investigation of non-linear effects upon photoionization by the highly intense soft X-ray laser pulses. In the photon energy range from 38 to 93 eV, we(More)
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