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Linear laser plasma toward large-sized uniform soft X-ray source

Published online by Cambridge University Press:  09 March 2009

Xiaofang Wang
Affiliation:
Shanghai Institute of Optics and Fine Mechanics, Academia Sinica, P.O. Box 800–211, Shanghai 201800, Peoples Republic of China
Zhizhan Xu
Affiliation:
Shanghai Institute of Optics and Fine Mechanics, Academia Sinica, P.O. Box 800–211, Shanghai 201800, Peoples Republic of China
Shisheng Chen
Affiliation:
Shanghai Institute of Optics and Fine Mechanics, Academia Sinica, P.O. Box 800–211, Shanghai 201800, Peoples Republic of China
Aidi Qian
Affiliation:
Shanghai Institute of Optics and Fine Mechanics, Academia Sinica, P.O. Box 800–211, Shanghai 201800, Peoples Republic of China
Yueling Li
Affiliation:
Shanghai Institute of Optics and Fine Mechanics, Academia Sinica, P.O. Box 800–211, Shanghai 201800, Peoples Republic of China
Pinzhong Fan
Affiliation:
Shanghai Institute of Optics and Fine Mechanics, Academia Sinica, P.O. Box 800–211, Shanghai 201800, Peoples Republic of China
Lihuang Lin
Affiliation:
Shanghai Institute of Optics and Fine Mechanics, Academia Sinica, P.O. Box 800–211, Shanghai 201800, Peoples Republic of China

Abstract

The effect of laser intensity distribution along the line focus on the uniformity of the line-shaped plasmas produced is investigated with time-integrated and time-resolved soft X-ray and optical diagnostics. Evident plasma condition nonuniformities along the line focus resulting from nonuniform laser intensity distributions have been observed with a conventional simple line-focusing technique. With a new line-focusing technique producing a uniform laser illumination, a uniform, line-shaped plasma can be obtained. It is also found that nonuniformities under uniform laser illumination occur mostly during laser heating. The line-shaped uniform laser plasma can be used as a large, uniform X-ray source besides its importance in X-ray laser demonstration and amplification. As an application of such line-shaped plasmas as X-ray sources, the no-overcoat 5F X-ray film is calibrated for the first time by a new method in the soft X-ray range from 10–80 A.

Type
Research Article
Copyright
Copyright © Cambridge University Press 1992

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