Interpretative modelling of JET's thermal helium diagnostic
Interpretative modelling of JET's thermal helium diagnostic
复制标题
JET 热氦诊断的解释模型
DOI：
10.1016/s0022-3115(98)00692-8
复制
发表时间：
1999
影响因子：
3.1
通讯作者：
P. Stangeby
中科院分区：
文献类型：
--
作者：
Y. Andrew;S. Davies;D. Elder;L. Horton;G. Matthews;A. Meigs;P. Morgan;M. O’Mullane;M. Stamp;R. Prentice;P. Stangeby
利用中性氦线比测量了MkIIa分流器中的电子密度ne和温度Te。实验结果表明，垂直靶注入氦气的光谱信号以再循环为主。当氦从水平目标注入时，可以区分注入和回收的光谱源。为了确定中性氦发射的空间位置，从而确定ne， temmeasurement，已经开发了一个解释模型，该模型使用杂质/中性代码，DIVIMP/NIMBUS，原子数据库ADAS和诊断视线。在一系列目标条件下，使用不同的注入点进行了测量和模拟。并与其他转向器诊断方法，如转向器干涉仪和目标朗缪尔探针进行了比较。
Electron density, ne, and temperature, Te, in the MkIIa divertor have been measured using neutral helium line ratios. Experimental evidence indicates that the spectroscopic signal for helium injected from the vertical target is dominated by recycling. When helium is injected from the horizontal target it is possible to differentiate between injected and recycled spectral sources. To determine the spatial location of the neutral helium emission, and hence of the ne, Temeasurements, an interpretative model has been developed which uses the impurity/neutral codes, DIVIMP/NIMBUS, the atomic database ADAS and the diagnostic lines of sight. Measurements and simulations have been performed using the various injection points over a range of target conditions. Comparisons with other divertor diagnostics, such as the divertor interferometer and target Langmuir probes are presented.