Development of a highly coherent x-ray laser

Masaharu Nishikino, Momoko Tanaka, Hayato Kawazome, Tetsuya Kawachi, Akira Sasaki, Noboru Hasegawa, Yoshihiro Ochi, Maki Kishimoto, Keisuke Nagashima, Naofumi Ohnishi

Research output: Chapter in Book/Report/Conference proceedingConference contributionpeer-review

1 Citation (Scopus)


We have developed a fully coherent x-ray laser (XRL) at 13.9 nm by a double-target configuration. In the experiment, a seed XRL beam from the first target is injected into a plasma amplifier at the second target. The amplified XRL beam has full spatial coherence, 0.2 mrad of the nearly diffraction limited divergence, and 25 nJ of the output energy. For various application researches, we improve the output energy and the beam property of the x-ray laser. The gain-length product was gL ∼ 8.2, and the maximum output energy of about 1 μJ is achieved. The divergence of the XRL is affected by the refraction influence in the amplifier medium and/or the diffraction by the small size of the gain medium. We made the 2-D radiation hydrodynamics simulation code in order to investigate the generation of the gain medium plasma and the refraction influence.

Original languageEnglish
Title of host publicationSUPERSTRONG FIELDS IN PLASMAS
Subtitle of host publication3rd International Conference on Superstrong Fields in Plasmas
Number of pages6
Publication statusPublished - 2006 Apr 7
Event3rd International Conference on Superstrong Fields in Plasmas - Varenna, Italy
Duration: 2005 Sept 192005 Sept 24

Publication series

NameAIP Conference Proceedings
ISSN (Print)0094-243X
ISSN (Electronic)1551-7616


Conference3rd International Conference on Superstrong Fields in Plasmas


  • 2-D radiation hydrodynamics simulation
  • X-ray laser


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