Observation and theory of X-ray mirages

Sergey Magnitskiy (), Nikolay Nagorskiy, Anatoly Faenov, Tatiana Pikuz, Mamoko Tanaka, Masahiko Ishino, Masaharu Nishikino, Yuji Fukuda, Masaki Kando, Tetsuya Kawachi and Yoshiaki Kato
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Sergey Magnitskiy: Faculty of Physics and International Laser Center of M.V. Lomonosov Moscow State University
Nikolay Nagorskiy: Faculty of Physics and International Laser Center of M.V. Lomonosov Moscow State University
Anatoly Faenov: Joint Institute for High Temperature, Russian Academy of Science
Tatiana Pikuz: Joint Institute for High Temperature, Russian Academy of Science
Mamoko Tanaka: Quantum Beam Science Directorate, Japan Atomic Energy Agency
Masahiko Ishino: Quantum Beam Science Directorate, Japan Atomic Energy Agency
Masaharu Nishikino: Quantum Beam Science Directorate, Japan Atomic Energy Agency
Yuji Fukuda: Quantum Beam Science Directorate, Japan Atomic Energy Agency
Masaki Kando: Quantum Beam Science Directorate, Japan Atomic Energy Agency
Tetsuya Kawachi: Quantum Beam Science Directorate, Japan Atomic Energy Agency
Yoshiaki Kato: The Graduate School for the Creation of New Photonics Industries

Nature Communications, 2013, vol. 4, issue 1, 1-7

Abstract: Abstract The advent of X-ray lasers allowed the realization of compact coherent soft X-ray sources, thus opening the way to a wide range of applications. Here we report the observation of unexpected concentric rings in the far-field beam profile at the output of a two-stage plasma-based X-ray laser, which can be considered as the first manifestation of a mirage phenomenon in X-rays. We have developed a method of solving the Maxwell–Bloch equations for this problem, and find that the experimentally observed phenomenon is due to the emergence of X-ray mirages in the plasma amplifier, appearing as phase-matched coherent virtual point sources. The obtained results bring a new insight into the physical nature of amplification of X-ray radiation in laser-induced plasma amplifiers and open additional opportunities for X-ray plasma diagnostics and extreme ultraviolet lithography.

Date: 2013
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DOI: 10.1038/ncomms2923

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