The combination of short wavelengths and ultrahigh intensities as provided by the new soft and hard X-ray free electron laser sources opens the doorway to totally new experiments on photon-matter interaction. It concerns, in particular, new classes of nonlinear inner-atomic processes. In the present contribution, recent results on sequential and nonsequential multi-photon ionization of gas phase targets are presented and discussed; including processes where also inner shells are affected. Moreover, examples are given how linear and nonlinear photoionization may be used for online photon diagnostics at these new radiation sources.
CITATION STYLE
Martins, M., Meyer, M., Richter, M., Sorokin, A. A., & Tiedtke, K. (2012). Atomic Physics Using Ultra-Intense X-Ray Pulses. In Springer Series on Atomic, Optical, and Plasma Physics (Vol. 68, pp. 307–330). Springer. https://doi.org/10.1007/978-3-642-25569-4_12
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