Studies on EUV spectra from highly charged high Z ions using magnetically confined high temperature plasmas

基于短波长光源的发展和对聚变等离子体中杂质行为的理解，我们在大螺旋装置（LHD）产生的光学薄高温等离子体中观测到了镧系元素、钨、铋等高电荷高Z离子的极紫外光谱。由于离子丰度的变化，光谱特征随电子温度的变化而急剧变化。系统地建立了Z.通过对谱线的识别以及与理论计算的对比分析，对发射机制以及Z和电子温度的依赖关系有了较好的了解。

In terms of the development of short wavelength light source and the understanding of impurity behaviors in fusion plasmas, we have observed extreme ultraviolet spectra from highly charged high Z ions of lanthanides, tungsten, bismuth, etc. in optically thin, high temperature plasmas produced in the Large Helical Device (LHD). Spectral feature has drastically changed depending on the electron temperature because of the change in ion abundance. Experimental database has been systematically developed in a wide range of Z. The emission mechanism as well as the dependences on Z and electron temperature has been well understood through the identifications of discrete spectral lines and the comparative analyses with theoretical calculations.