X‐ray spectra from high‐intensity subpicosecond laser produced plasmas
X‐ray spectra from high‐intensity subpicosecond laser produced plasmas
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DOI：
10.1063/1.871481
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发表时间：
1995-03
影响因子：
2.2
通讯作者：
U. Teubner;C. Wuelker;W. Theobald;E. Förster
中科院分区：
文献类型：
--
作者：
U. Teubner;C. Wuelker;W. Theobald;E. Förster
研究了高强度亚皮秒KrF* *激光脉冲与铝等离子体的相互作用。在1017w /cm2以下的一系列强度和不同入射角下，激光脉冲吸收与x射线产生有关。用不同的光谱仪测量了7 ~ 150a波长范围内的软x射线光谱。光谱对激光强度、偏振度和入射角有明显的依赖性。观测到的光谱对入射光强和入射角的依赖关系是激光脉冲吸收的角度依赖关系和吸收能量转换成软x射线发射效率的角度依赖关系的结果。光谱受吸收体积大小、主要发生吸收的电子密度以及电子温度等其他参数的影响。研究了高强度亚皮秒KrF* *激光脉冲与铝等离子体的相互作用。在1017w /cm2以下的一系列强度和不同入射角下，激光脉冲吸收与x射线产生有关。用不同的光谱仪测量了7 ~ 150a波长范围内的软x射线光谱。光谱对激光强度、偏振度和入射角有明显的依赖性。观测到的光谱对入射光强和入射角的依赖关系是激光脉冲吸收的角度依赖关系和吸收能量转换成软x射线发射效率的角度依赖关系的结果。光谱受吸收体积大小、主要发生吸收的电子密度以及电子温度等其他参数的影响。
The interaction of high‐intensity subpicosecond KrF*‐laser pulses with aluminum plasmas has been investigated. The laser pulse absorption and the x‐ray production have been related at a series of intensities up to 1017 W/cm2 and different angles of incidence. Soft x‐ray spectra were measured in the wavelength range from 7 to 150 A with various spectrographs. The spectra show distinct dependences on the laser intensity, the polarization, and the angle of incidence. The observed dependence of the spectra on the intensity and on the angle of incidence is the result of both the angular dependence of the laser pulse absorption and that of the conversion efficiency of the absorbed energy into soft x‐ray emission. The spectra are influenced by the size of the absorption volume, the electron density where the absorption mainly takes place, and other parameters, such as the electron temperature.The interaction of high‐intensity subpicosecond KrF*‐laser pulses with aluminum plasmas has been investigated. The laser pulse absorption and the x‐ray production have been related at a series of intensities up to 1017 W/cm2 and different angles of incidence. Soft x‐ray spectra were measured in the wavelength range from 7 to 150 A with various spectrographs. The spectra show distinct dependences on the laser intensity, the polarization, and the angle of incidence. The observed dependence of the spectra on the intensity and on the angle of incidence is the result of both the angular dependence of the laser pulse absorption and that of the conversion efficiency of the absorbed energy into soft x‐ray emission. The spectra are influenced by the size of the absorption volume, the electron density where the absorption mainly takes place, and other parameters, such as the electron temperature.