Doppler-free two-photon excitation of Lyman-α fluorescence for the diagnostics of magnetically confined fusion plasmas
Doppler-free two-photon excitation of Lyman-α fluorescence for the diagnostics of magnetically confined fusion plasmas
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用于磁约束聚变等离子体诊断的莱曼-α 荧光的无多普勒双光子激发
DOI：
10.1063/1.1150620
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发表时间：
2000
期刊：
影响因子：
--
通讯作者：
D. Voslamber
中科院分区：
文献类型：
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作者：
D. Voslamber
研究了无多普勒双光子激发氢莱曼-α荧光作为磁约束聚变（MCF）等离子体诊断的激光诱导荧光（LIF）技术。一个正式的分析基础的原子和等离子体物理以及各种实际方面，如参数优化和实验精度。后者进行了分析方面的光子噪声和等离子体和激光参数的荧光信号的灵敏度。所描述的LIF技术的诊断潜力依赖于其高光谱分辨率。因此，氢同位素H、D和T的吸收线彼此清楚地分离，并且可以用于同位素选择性密度测量。此外，利用小带宽的可调谐激光系统，可以从谱线形状推断各种等离子体参数，如中性点的温度或有效电荷数Zeff。荧光光谱的偏振特性。
Doppler-free two-photon excitation of hydrogen Lyman-α fluorescence is investigated as a possible laser-induced fluorescence (LIF) technique for the diagnosis of magnetically confined fusion (MCF) plasmas. A formal analysis is presented of the underlying atomic and plasma physics as well as of various practical aspects, such as parameter optimization and experimental precision. The latter is analyzed with regard to the photon noise and to the sensitivity of the fluorescence signals to the plasma and laser parameters. The diagnostic potential of the LIF technique described relies on its high spectral resolution. Thus, the absorption lines of the hydrogen isotopes H, D, and T are clearly separated from each other and can serve for isotope-selective density measurements. In addition, using a tunable laser system with small bandwidth, various plasma parameters can be inferred from the spectral line shapes, such as the neutrals’ temperatures or the effective charge number Zeff. The polarization of the fluoresc...