Efficiency of Laser Plasma Kα Emission for Time-Resolved X-ray Imaging

Laser Plasma X-rays (LPX) with a duration of 10 ps or less, emitted from a solid target irradiated by a femtosecond laser pulse, is useful for time-resolved measurements. The intensity of this radiation is 4×10 9 photons/shot/4πsr at maximum, which corresponds to the conversion efficiency of laser e...

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Bibliographic Details
Published in:Japanese Journal of Applied Physics 2004-04, Vol.43 (4R), p.1608
Main Authors: Ohkubo, Takeru, Kinoshita, Kenichi, Zhidkov, Alexei, Hosokai, Tomonao, Kanegae, Yukio, Uesaka, Mitsuru
Format: Article
Language:English
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Summary:Laser Plasma X-rays (LPX) with a duration of 10 ps or less, emitted from a solid target irradiated by a femtosecond laser pulse, is useful for time-resolved measurements. The intensity of this radiation is 4×10 9 photons/shot/4πsr at maximum, which corresponds to the conversion efficiency of laser energy into Kα X-rays of 3.4×10 -5 . By simulations of the interaction of a laser pulse with a solid target, the efficiency is shown to increase more than ten times by suppressing the energy of a laser prepulse.
ISSN:0021-4922
1347-4065
DOI:10.1143/JJAP.43.1608