Abstract

The test results of the prototype of the secondary-emission probe operating in the mode of self-oscillatory sweep intended for diagnosing nonequilibrium plasma in the presence of epithermal group of electrons are given. Earlier, the method of self-oscillatory probe was tested using an aluminum water-cooled contact surface with formation of a nanoscale thick high-emission oxide coating. The structure of the described probe is peculiar owing to application of refractory tantalum, which is capable of working in the mode of radiation cooling, which simplifies the structure and increases the reliability of the probe. It is shown that, owing to secondary-emission characteristics, oxide-coated tantalum allows under plasma loading obtaining a pronounced N-type current–voltage characteristic with a large excess in the electron-emission current component against the ion saturation current and satisfies all requirements for realization of the method of self-oscillatory probe.

中文翻译：

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测试二次发射自振荡探头

摘要

给出了以自振荡扫描模式工作的次级发射探针原型的测试结果，该模型用于在存在电子超热基团的情况下诊断非平衡等离子体。早期，使用铝水冷接触表面形成了纳米级厚的高发射氧化物涂层，测试了自振荡探头的方法。所描述的探针的结构由于应用了耐火钽而特有，该钽能够以辐射冷却的方式工作，从而简化了结构并提高了探针的可靠性。结果表明，由于具有二次排放特性，