Thermal X-ray spectra and impurities in the ST Tokamak
Thermal X-ray spectra and impurities in the ST Tokamak
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ST 托卡马克的热 X 射线光谱和杂质
DOI：
10.1088/0029-5515/15/2/015
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发表时间：
1975
期刊：
影响因子：
3.3
通讯作者：
E. Hinnov
中科院分区：
文献类型：
--
作者：
S. von Goeler;W. Stodiek;H. Eubank;H. Fishman;S. Grebenshchikov;E. Hinnov
本文研究了ST托卡马克装置中电子速度分布的热部分产生的软X射线辐射的谱分布。如果考虑径向轮廓效应，谱的斜率与激光测量电子温度的预测值符合得很好。绝对强度比氢韧致辐射的预期大5到100倍。这种增强可以用氧和重金属杂质的复合辐射来定量解释。为了研究托卡马克中杂质的分布，测量了不同半径下的增强因子ζ。这些实验以及其他将高Z气体(Xe，Kr，A)脉冲注入放电的实验表明，在测量精度范围内，ZJeff不随半径变化很大。
A study is made of the spectral distribution of the soft X-ray emission produced by the thermal part of the electron velocity distribution in the ST Tokamak. The slopes of the spectra are in good agreement with the prediction from laser measurement of electron temperature if radial profile effects are taken into account. The absolute intensity is a factor 5 to 100 larger than is expected for hydrogen bremsstrahlung. This enhancement can be quantitatively accounted for by recombination radiation from oxygen and heavy-metal impurities. The enhancement factor ζ was measured at different radii, in order to study the impurity distribution in the tokamak. These, as well as other experiments, in which high-Z gases (Xe, Kr, A) were pulsed into the discharge, indicated that, within the measuring accuracy, Zeff does not vary substantially with radius.