Multi Photon Physics at the LCLS

Christoph Roedig, Gilles Doumy, Sang-Kil Son, C. I. Blaga, Anthony DiChiara, R. Santra, N. Berrah, C. Bosteadt, J. D. Bozek, Philip H. Bucksbaum, J. P. Cryan, L. Fang, S. Ghimire, J. M. Glownia, M. Hoener, E. P. Kanter, B. Krassig, M. Kuebel, M. Messerschmidt, G. Paulus, David A. Reis, Nina Rohringer, L. Young, Pierre Agostini, and Lou DiMauro

[BibTeX]doi:10.1364/LS.2011.LThE1

Nonlinear absorption of femtosecond kilovolt x-rays in Neon is investigated. A possible two-photon Ionization is observed with the presence of Ne⁹⁺ at photon energies below the Ne⁸⁺ 1s² ionization threshold.

Tags: Ne, nonlinear, x-ray, LCLS, experiment, XATOM, FEL, CFEL, DESY