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Physics of Plasmas : High intensity x-ray line emission from aluminum plasmas generated by a 120TW, 30fs laser pulse

By Jiamin Yang, Zhimin Hu, Jiyan Zhang, Tuo Zhu, Yang Zhao et al

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Book Id: WPLBN0002169650
Format Type: PDF eBook :
File Size: Serial Publication
Reproduction Date: 20 November 2008

Title: Physics of Plasmas : High intensity x-ray line emission from aluminum plasmas generated by a 120TW, 30fs laser pulse  
Author: Jiamin Yang, Zhimin Hu, Jiyan Zhang, Tuo Zhu, Yang Zhao et al
Volume: Issue : November 2008
Language: English
Subject: Science, Physics, Natural Science
Collections: Periodicals: Journal and Magazine Collection (Contemporary), Physics of Plasmas Collection
Historic
Publication Date:
Publisher: American Institute of Physics

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Zhimin Hu, Jiyan Zhang, Tuo Zhu, Yang Zhao Et A, J. Y. (n.d.). Physics of Plasmas : High intensity x-ray line emission from aluminum plasmas generated by a 120TW, 30fs laser pulse. Retrieved from http://community.worldlibrary.org/


Description
Description: The K-shell x-ray spectra from the aluminum plasmas generated by the interaction of the 120 TW, 30 fs laser with aluminum targets have been measured by defocusing the laser beam. Laser energy-normalized intensity of the He-a line increases with the laser intensity approximately as a power law ε∝ILγ with the much smaller exponent of γ = 0.062 compared to γ = 0.2 ∼ 0.5 in the previous experiments, which is caused by the stronger radial thermal diffusivity in the target for the smaller laser spot. Laser-to-He-a line conversion efficiency of up to 1.9×10−3 and as high as about 3×1013 photons/2π Sr aluminum He-a line x-ray source have been achieved for a single shot due to the preplasma effect and relatively large laser spot and energy for the single shot. The x-ray spectra as a function of the laser intensity are also analyzed to get the electron temperature and density.

 

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