柱状锗等离子体状态的时空分辨诊断
TIME AND SPACE-RESOLVED DIAGNOSIS OF Ge PLASMA COLUMN
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摘要: 在四靶串接X光激光实验中,用时间分辨晶体谱仪记录了类Ne锗共振线及其类Na伴线的时间扫描特性。测出了这些谱线的辐射持续时间（FWHM）约为0.95ns。考察了锗等离子体电子温度Te随时间的演化,观测到Te≥400eV的维持时间大于1.2ns。用空间分辨晶体谱仪诊断得到锗等离子体电子温度Te和电子密度ne的轴向分布,其平均值Te=4.9×102eV,ne=1.2×1020/cm3。Abstract: In the experiment of X-ray laser with four-target series coupling, a time-resolved crystal spectrograph was used to record the resonant spectral lines of Ne- like Ge ions and their satellites. Emission time of these lines was measured to be about 0.95ns (FWHM). The time evolution of electron temperature Te of Ge plasma obtained showed that the duration of Te (≥400eV) was larger than 1.2ns.A space-resolved crystal spectrograph.was used to diagnose the distribution of electron temperature Te and density ne along the axis of the Ge plasma column. The average values of Te and ne were 4.9 × 102eV and 1.2 × 1020cm-3 respectively.
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Key words:
- Ne-like Ge resonant line /
- time-resolved /
- space-resolved /
- electron temperature
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