X-Ray Lasers 2016 Proceedings of the 15th International Conference on X-Ray Lasers - Kawachi, Tetsuya; Kawachi, Tetsuya; Bulanov, Sergei V.; Bulanov, Sergei V.; Daido, Hiroyuki; Daido, Hiroyuki; Kato, Yoshiaki; Kato, Yoshiaki (Springer International Publishing : Imprint: Springer, 2018)