Heidelberg 2015 – scientific programme

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A: Fachverband Atomphysik

A 28: Poster: Interaction with VUV and X-ray light II

A 28.4: Poster

Wednesday, March 25, 2015, 17:00–19:00, C/Foyer

X-ray lasing with highly charged ions — •Chunhai Lyu, Zoltán Harman, Stefano M. Cavaletto, and Christoph H. Keitel — Max-Planck-Institut für Kernphysik, Saupfercheckweg 1, 69117 Heidelberg, Germany

We theoretically propose an approach to create population inversion by K-shell ionization of highly charged ions with x-ray free electron laser pulses, which results in subsequent lasing in the X-ray regime. The time-dependent dynamics of the population of the ionic states and the gain of the x-ray laser pulses are simulated numerically in the framework of a density matrix approach. Due to the absence of Auger decay, in selected ions, the bandwidth of the x-ray laser is decreased and hence the coherence is improved. Furthermore, the frequency of the laser can be increased approximately quadratically with the charge number of the ions, and can be extended to the hard x-ray regime if heavy ions are used.