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Enormous Amplification of Full-Coherent Radiation in the Extreme Ultraviolet Region with a Free-Electron Laser

  • Eiji J. Takahashi
  • Tadashi Togashi
  • Makoto Aoyama
  • Koichi Yamakawa
  • Takahiro Sato
  • Atsushi Iwasaki
  • Shigeki Owada
  • Kaoru Yamanouchi
  • Toru Hara
  • Shinichi Matsubara
  • Takashi Ohshima
  • Yuji Otake
  • Hitoshi Tanaka
  • Takashi Tanaka
  • Hiromitsu Tomizawa
  • Takahiro Watanabe
  • Makina Yabashi
  • Katsumi Midorikawa
  • Tetsuya Ishikawa
Conference paper
Part of the Springer Proceedings in Physics book series (SPPHY, volume 125)

Abstract

High-order harmonic beam was injected as a seeding source to a 250-MeV free-electron-laser amplifier. When the amplification conditions were satisfied, strong enhancement of the radiation intensity by a factor of 650 was observed at a wavelength of 61.5 nm. The random and uncontrollable spikes, which appeared in the spectra of the Self-Amplified Spontaneous Emission based FEL radiation without the seeding pulse, were found to be suppressed drastically to form to a narrow-band, single peak profile at the seeding wavelength. The properties of the seeded FEL radiation were well reproduced by numerical simulations.

Keywords

Electron Bunch Extreme Ultraviolet Seed Pulse Seeding Effect Longitudinal Coherence 
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Copyright information

© Springer-Verlag Berlin Heidelberg 2012

Authors and Affiliations

  • Eiji J. Takahashi
    • 1
  • Tadashi Togashi
    • 2
  • Makoto Aoyama
    • 3
  • Koichi Yamakawa
    • 3
  • Takahiro Sato
    • 4
    • 5
  • Atsushi Iwasaki
    • 5
  • Shigeki Owada
    • 5
  • Kaoru Yamanouchi
    • 5
  • Toru Hara
    • 4
  • Shinichi Matsubara
    • 2
  • Takashi Ohshima
    • 4
  • Yuji Otake
    • 4
  • Hitoshi Tanaka
    • 4
  • Takashi Tanaka
    • 4
  • Hiromitsu Tomizawa
    • 2
  • Takahiro Watanabe
    • 4
  • Makina Yabashi
    • 4
  • Katsumi Midorikawa
    • 1
  • Tetsuya Ishikawa
    • 4
  1. 1.RIKEN-ASIWakoJapan
  2. 2.JASRIHyogoJapan
  3. 3.JAEAKizugawaJapan
  4. 4.RIKEN SPring-8 CenterHyogoJapan
  5. 5.University of TokyoTokyoJapan

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