Transient structure of ionized atmosphere in pulsed laser propulsion system

Koji Takahashi, K. Maeda, T. Ikuta, S. Hatano, Y. Mori, K. Nagayama

研究成果: Contribution to journalConference article査読

1 被引用数 (Scopus)

抄録

Optical breakdown of air is explored by using high-speed photography for the realization of laser propulsion system in aerospace engineering. The multiple ionization and subsequent pear-shaped emission by laser pulse through a convex lens are recorded and analyzed by image converter camera. The improved pulsed-laser shadowgraphy employed in this system successfully enables us to visualize the transient structures of complicated shock waves more clearly than ever. The ionization just above the surface of an aluminum target is also examined in comparison with the case of no target, which may be the major mechanism of Myrabo's demonstration of a small flyer launching by a pulsed carbon dioxide laser. Not only the high-enthalpy states of the ionized atmosphere are calculated but also the precise history of breakdown initiation in the nanosecond laser pulse is obtained.

本文言語英語
ページ(範囲)907-916
ページ数10
ジャーナルProceedings of SPIE - The International Society for Optical Engineering
4183
DOI
出版ステータス出版済み - 1 1 2001
イベント24th International Congress on High-Speed Photography and Photonics - Sendai, 日本
継続期間: 9 24 20009 29 2000

All Science Journal Classification (ASJC) codes

  • 電子材料、光学材料、および磁性材料
  • 凝縮系物理学
  • コンピュータ サイエンスの応用
  • 応用数学
  • 電子工学および電気工学

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