Journal of the Optical Society of Korea

Optical Society of Korea (한국광학회)
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High-resolution Spectroscopy of the Nickel-like Molybdenum X-ray Laser Toward the Generation of Circularly Polarized X-ray Laser

  • Hasegawa, Noboru (Quantum Beam Science Directorate, Japan Atomic Energy Agency (JAEA)) ;
  • Sasaki, Akira (Quantum Beam Science Directorate, Japan Atomic Energy Agency (JAEA)) ;
  • Yamatani, Hiroshi (Quantum Beam Science Directorate, Japan Atomic Energy Agency (JAEA)) ;
  • Kishimoto, Maki (Quantum Beam Science Directorate, Japan Atomic Energy Agency (JAEA)) ;
  • Tanaka, Momoko (Quantum Beam Science Directorate, Japan Atomic Energy Agency (JAEA)) ;
  • Ochi, Yoshihiro (Quantum Beam Science Directorate, Japan Atomic Energy Agency (JAEA)) ;
  • Nishikino, Masaharu (Quantum Beam Science Directorate, Japan Atomic Energy Agency (JAEA)) ;
  • Kunieda, Yuichi (Quantum Beam Science Directorate, Japan Atomic Energy Agency (JAEA)) ;
  • Kawachi, Tetsuya (Quantum Beam Science Directorate, Japan Atomic Energy Agency (JAEA)) ;
  • Yoneda, Hitoki (Institute for Laser Science, University of Electro-Communications) ;
  • Iwamae, Atsushi (Department of Engineering, Faculty of Engineering, Kyoto University)
  • Received : 2008.12.16
  • Accepted : 2009.02.26
  • Published : 2009.03.25
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Abstract

We attempted the first measurement of the spectral width of the nickel-like molybdenum x-ray laser (${\lambda}\;=\;18.895\;nm$) by use of a high-resolution spectrometer in order to determine the strength of the magnetic field required for the generation of a circularly polarized x-ray laser. The spectral width was measured to be ${\Delta}{\lambda}\;=\;18\;m{\AA}$ under the substantial lasing condition. The magnetic field required for the generation of a circularly polarized x-ray laser was 40 T. The splitting of the x-ray laser line was clearly obtained under 15 T external magnetic field. The strength of the magnetic field estimated from the splitting of the x-ray laser line was large compared with the external magnetic field. It implies that there might be an alternative mechanism for enhancement of the magnetic field in the gain medium plasma.

Keywords

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