Suppression of Energy Fluctuation for the Free Electron Laser at LEBRA.

  • Yokoyama Kazue
    Graduate School of Science and Technology, Nihon University, 7-24-1 Narashinodai, Funabashi 274-8501, Japan
  • Sato Isamu
    Institute of Quantum Science, Nihon University, 7-24-1 Narashinodai, Funabashi 274-8501, Japan
  • Hayakawa Ken
    Institute of Quantum Science, Nihon University, 7-24-1 Narashinodai, Funabashi 274-8501, Japan
  • Tanaka Toshinari
    Institute of Quantum Science, Nihon University, 7-24-1 Narashinodai, Funabashi 274-8501, Japan
  • Sato Kazuo
    Institute of Quantum Science, Nihon University, 7-24-1 Narashinodai, Funabashi 274-8501, Japan
  • Hayakawa Yasushi
    Institute of Quantum Science, Nihon University, 7-24-1 Narashinodai, Funabashi 274-8501, Japan
  • Nakazawa Hiroyuki
    Graduate School of Science and Technology, Nihon University, 7-24-1 Narashinodai, Funabashi 274-8501, Japan
  • Kanno Koichi
    Graduate School of Science and Technology, Nihon University, 7-24-1 Narashinodai, Funabashi 274-8501, Japan
  • Sakai Takeshi
    Graduate School of Science and Technology, Nihon University, 7-24-1 Narashinodai, Funabashi 274-8501, Japan
  • Ishiwata Ken'ichiro
    Graduate School of Science and Technology, Nihon University, 7-24-1 Narashinodai, Funabashi 274-8501, Japan

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The first lasing of the free electron laser (FEL) was achieved in May 2001 at Nihon University. Problems occurred regarding the energy stability of the electron beam in the pulse duration and the long operation time for the FEL. The energy stability has been improved by compensation of the RF phase drift with a function generator and a feedback circuit.

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