| Literature DB >> 21263571 |
Tadashi Togashi1, Eiji J Takahashi, Katsumi Midorikawa, Makoto Aoyama, Koichi Yamakawa, Takahiro Sato, Atsushi Iwasaki, Shigeki Owada, Tomoya Okino, Kaoru Yamanouchi, Fumihiko Kannari, Akira Yagishita, Hidetoshi Nakano, Marie E Couprie, Kenji Fukami, Takaki Hatsui, Toru Hara, Takashi Kameshima, Hideo Kitamura, Noritaka Kumagai, Shinichi Matsubara, Mitsuru Nagasono, Haruhiko Ohashi, Takashi Ohshima, Yuji Otake, Tsumoru Shintake, Kenji Tamasaku, Hitoshi Tanaka, Takashi Tanaka, Kazuaki Togawa, Hiromitsu Tomizawa, Takahiro Watanabe, Makina Yabashi, Tetsuya Ishikawa.
Abstract
The 13th harmonic of a Ti:sapphire (Ti:S) laser in the plateau region was injected as a seeding source to a 250-MeV free-electron-laser (FEL) amplifier. When the amplification conditions were fulfilled, strong enhancement of the radiation intensity by a factor of 650 was observed. The random and uncontrollable spikes, which appeared in the spectra of the Self-Amplified Spontaneous Emission (SASE) based FEL radiation without the seeding source, were found to be suppressed drastically to form to a narrow-band, single peak profile at 61.2 nm. The properties of the seeded FEL radiation were well reproduced by numerical simulations. We discuss the future precept of the seeded FEL scheme to the shorter wavelength region.Year: 2011 PMID： 21263571 DOI： 10.1364/OE.19.000317
Source DB: PubMed Journal: Opt Express ISSN： 1094-4087 Impact factor: 3.894