S. Sebban,1 F. Tissandier,1 J. Gautier,1 M. Kozlova,1 J. P. Goddet,1 O. Guilbaud,2 P. Zeitoun,1 M. Ribière,1 S. Jacquemot,3 G. Lambert,1 G. Maynard,2 B. Robillard,2 A. Klisnick,4 T. Mocek,5 J. Nejdlhttps://orcid.org/0000-0003-0864-85925
1Lab. d'Optique Appliquée, CNRS, Ecole Polytechnique ParisTech (France) 2Lab. de Physique des Gaz et des Plasmas, CNRS, Univ. Paris-Sud 11 (France) 3Ecole Polytechnique (France) 4ISMO, CNRS, Univ. Paris-Sud 11 (France) 5Institute of Physics of the ASCR, v.v.i. (Czech Republic)
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We report spatial and spectral characterization an optical-field-ionized high-order harmonic-seeded soft-x-ray laser. We
show that it can be controlled between a regular Gaussian shape and a Bessel profile exhibiting several rings via the IR
laser pump intensity. The temporal coherence and spectral linewidth of both the seeded and unseeded soft-x-ray lasers
were experimentally measured using a varying path difference interferometer. It showed that the high-order harmonic is
subject to a strong spectral narrowing during its propagation in the plasma amplifier without rebroadening at saturation.
Also, we present a new method to generate ultra-short x-ray laser pulses by using the laser-driven betatron source to
photo-pump inner-shell transitions.
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S. Sebban, F. Tissandier, J. Gautier, M. Kozlova, J. P. Goddet, O. Guilbaud, P. Zeitoun, M. Ribière, S. Jacquemot, G. Lambert, G. Maynard, B. Robillard, A. Klisnick, T. Mocek, J. Nejdl, "Advances in laser driven soft x-ray lasers at LOA," Proc. SPIE 8140, X-ray Lasers and Coherent X-ray Sources: Development and Applications IX, 814005 (4 October 2011); https://doi.org/10.1117/12.892394