The electron energy probability function (EEPF) probe measurements in cold plasma controlled by high-energy (0.5–1 keV) run-away electrons generated in an ‘open-discharge’ configuration are presented in this paper. High plasma stability along with the second harmonic lock-in measurement method provide a sufficiently high accuracy of the EEPF measurements which makes it possible to thoroughly study the features of both cold plasma and the probe method itself. The experiments have been carried out in pure gases: Ar, He, O 2 and H 2 . The run-away electron beam is revealed to produce a lot of cold electrons in each gas and the EEPF is Maxwellian with T e about few tens of meV (which is slightly higher than the gas temperature). It is shown that an EEPF can be correctly measured under these conditions if the modulation amplitude and, accordingly, the energy resolution of the method is less than the electron temperature, T e . At ...

中文翻译：

---

受高能失控电子控制的等离子体中的电子能量概率函数

本文介绍了冷等离子体中的电子能量概率函数（EEPF）探针测量，该等离子体由“开放放电”配置中产生的高能（0.5-1 keV）失控电子控制。较高的等离子体稳定性以及二次谐波锁定测量方法可提供足够高的EEPF测量精度，这使得可以彻底研究冷等离子体和探针方法本身的特性。实验是在纯气体：Ar，He，O 2和H 2中进行的。失控的电子束显示出会在每种气体中产生大量冷电子，而EEPF是麦克斯韦（Maxwellian），T e约为几十meV（略高于气体温度）。结果表明，在这些条件下，如果调制幅度以及相应地，该方法的能量分辨率小于电子温度T e。在 ...