Here, we report on modifications to the electron energy distribution function during X-mode microwave injection in argon and helium helicon plasmas. No electron heating is observed in argon helicon plasmas. Significant electron heating, $\Delta T_e\sim 1$ eV, is observed in helium plasmas. The heating is spatially localized to the upper hybrid resonance layer. Previously absent helium ion emission lines, from states over 50 eV above the helium ion ground state, are observed with the injection of X-mode microwaves.

中文翻译：

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X射线微波注入在螺旋等离子体中进行辐射局部电子加热

在这里，我们报告在氩和氦螺旋等离子体中进行X模微波注入过程中对电子能量分布函数的修改。在氩螺旋等离子体中未观察到电子加热。显着的电子加热$\Delta {Ť}_{Ë}〜\mathrm{1个}$eV在氦等离子体中观察到。加热在空间上局限于上部混合共振层。通过注入X模态微波，可以观察到先前不存在的氦离子发射谱线，该谱线比氦离子基态高出50 eV。