Observation of a plasma waveguide in a preformed plasma pumped by double-pulse laser irradiation for the efficient soft X-ray amplification

Kawachi, Tetsuya; Hasegawa, Noboru; Nishikino, Masaharu; Ochi, Yoshihiro; Sasaki, Akira

A molybdenum slab target was irradiated by double pulses of line-focused CPA Nd:glass laser. A probe beam was injected in the plasma in the longitudinal direction, and we found that the probe beam was guided in the plasma with the plasma length of up to 4.3 mm at the time of 0.8 1.5 ns after the peak of the second pulse. Comparison with hydrodynamics code implied that the electron density dip or flat region was formed, which was favorable for the efficient soft X-ray lasing under the coupling of seed X-ray and X-ray amplifier.

Language	:	English
Journal	:	Optics Letters
Volume	:	34
Number	:	5
Pages	:	p.635 - 637
Publication Year/Month	:	2009/03
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Paper URL	:	https://doi.org/10.1364/OL.34.000635
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Keywords	:	no keyword
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Registration No. : AA20080682
JAEA Abstracts No. : 37000639
Paper Submission No. : 5666

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