High intensity x-ray line emission from aluminum plasmas generated by a 120TW, 30fs laser pulse
The K-shell x-ray spectra from the aluminum plasmas generated by the interaction of the 120TW, 30fs 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 wi...
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Veröffentlicht in: | Physics of plasmas 2008-11, Vol.15 (11) |
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container_title | Physics of plasmas |
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creator | Yang, Jiamin Hu, Zhimin Zhang, Jiyan Zhu, Tuo Zhao, Yang Wen, Tianshu Wang, Zhebin Ding, Yaonan Wei, Mingxi Yang, Guohong Zhang, Baohan |
description | The K-shell x-ray spectra from the aluminum plasmas generated by the interaction of the 120TW, 30fs 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. |
doi_str_mv | 10.1063/1.3023110 |
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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.</description><identifier>ISSN: 1070-664X</identifier><identifier>EISSN: 1089-7674</identifier><identifier>DOI: 10.1063/1.3023110</identifier><language>eng</language><ispartof>Physics of plasmas, 2008-11, Vol.15 (11)</ispartof><lds50>peer_reviewed</lds50><woscitedreferencessubscribed>false</woscitedreferencessubscribed><citedby>FETCH-LOGICAL-c740-e15f24b145bbe90c2c691bf472260eff5cd6e8e9f6722e31d6f4194449caebd13</citedby><cites>FETCH-LOGICAL-c740-e15f24b145bbe90c2c691bf472260eff5cd6e8e9f6722e31d6f4194449caebd13</cites></display><links><openurl>$$Topenurl_article</openurl><openurlfulltext>$$Topenurlfull_article</openurlfulltext><thumbnail>$$Tsyndetics_thumb_exl</thumbnail><link.rule.ids>314,776,780,27901,27902</link.rule.ids></links><search><creatorcontrib>Yang, Jiamin</creatorcontrib><creatorcontrib>Hu, Zhimin</creatorcontrib><creatorcontrib>Zhang, Jiyan</creatorcontrib><creatorcontrib>Zhu, Tuo</creatorcontrib><creatorcontrib>Zhao, Yang</creatorcontrib><creatorcontrib>Wen, Tianshu</creatorcontrib><creatorcontrib>Wang, Zhebin</creatorcontrib><creatorcontrib>Ding, Yaonan</creatorcontrib><creatorcontrib>Wei, Mingxi</creatorcontrib><creatorcontrib>Yang, Guohong</creatorcontrib><creatorcontrib>Zhang, Baohan</creatorcontrib><title>High intensity x-ray line emission from aluminum plasmas generated by a 120TW, 30fs laser pulse</title><title>Physics of plasmas</title><description>The K-shell x-ray spectra from the aluminum plasmas generated by the interaction of the 120TW, 30fs 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. 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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.</abstract><doi>10.1063/1.3023110</doi></addata></record> |
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title | High intensity x-ray line emission from aluminum plasmas generated by a 120TW, 30fs laser pulse |
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