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A: Fachverband Atomphysik

A 20: Poster Session I

A 20.21: Poster

Tuesday, March 7, 2017, 17:00–19:00, P OG1

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

X-ray lasing by inner-shell stimulated emission of highly charged ions (HCIs) is considered in theoretical simulations. Spiky, partially coherent x-ray free-electron lasers pulses are used to pump the lasing by ionizing K-shell electrons. Because there is no cavity to choose a specific frequency from the HCI’s amplified spontaneous emission spectrum, the linewidth of the x-ray laser approximates the gain profile of the HCI medium. A frequency-dependent gain is calculated by means of time-dependent density-matrix simulations. Compared to similar approaches with neutral atoms in former experiments, certain HCIs promise a much narrower bandwidth of x-ray laser light.