| 摘要 |
PROBLEM TO BE SOLVED: To obtain a method wherein a laser beam is stored, light is made to go back and forth between many curved surface mirrors, a space or a time region having strong light intensity is created by overlapping the optical path of the light, and the interaction between the light and a gas flow, an accelerated particle beam, a liquid or a solid substance is intensified. SOLUTION: The many curved surface mirrors are fixed and arranged on a certain circumference. Two from amount them are faced with each other. The laser beam is made to go back and forth. Whenever it goes back and forth, the curved surface mirrors are replaced. Its poetical path is shifted. A region whose light is strong or a pillar of light is formed on its axis by the enveloping surface of the optical path.
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