Direct imaging of spatial distribution of ions generated by nonresonant multiphoton ionization of H2 gas

Shingo Ichimura, Shigeyuki Sekine, Hans Joachim Steffen, Kiyohide Kokubun, Hazime Shimizu

研究成果: Article査読

6 被引用数 (Scopus)

抄録

The spatial distribution of ions generated by nonresonant multiphoton ionization (NRMPI) of H2 gas with a picosecond YAG laser was clearly observed with a new detection system consisted of a static lens, a microchannel plate (MCP) intensifies a charge-coupled device (CCD) camera, and an image processor. The ions were distributed along a straight line, reflecting the ion generation along the laser beam path. The ionization region had a spindle shape with the maximum diameter at the focal point of a spherical lens used for laser beam focussing. The size of the ionization region was about 2.5 mm in length and 0.05 mm in diameter when the gas pressure was 1 × 10–5 Pa and incident laser energy was 12 mJ/pulse. The laser power density at the focal point was about 2 × 1013 W/cm2.

本文言語English
ページ(範囲)L135-L138
ジャーナルJapanese journal of applied physics
33
1
DOI
出版ステータスPublished - 1994 1月
外部発表はい

ASJC Scopus subject areas

  • 工学(全般)
  • 物理学および天文学(全般)

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