Abstract

The results of studying the self/non-self-sustained gas discharge (SNSS discharge) excited by microwave beams at high gas pressure (atmospheric or higher than atmospheric) under conditions of a substantially subthreshold radiation power are presented. The discharge has a number of properties that distinguish it from all microwave discharges described in literature. The physical model of the discharge built at the Prokhorov General Physics Institute, Russian Academy of Sciences, describes its excitation at pressures high enough that the frequency of electron-neutral collisions is appreciably higher than the cyclic frequencies of microwaves, and the microwave beam power is much lower than the threshold for the excitation of a self-sustained plasma formation. For the first time, the article presents the results of “shadow” photography demonstrating one of the main properties of discharge—its structure, which is a set of “microexplosion” formations moving against the microwave radiation.

中文翻译：

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微波在高压气体中激发的亚阈值放电，该等离子体是多种等离子体“微爆炸”的系统

摘要

给出了在基本上低于阈值的辐射功率的条件下，研究在高​​气压（大气压或高于大气压）下由微波束激发的自/非自持气体放电（SNSS放电）的结果。放电具有许多特性，使其有别于文献中描述的所有微波放电。俄罗斯科学院普罗霍罗夫综合物理研究所建立的放电物理模型描述了其在足够高的压力下激发，使得电子中性碰撞的频率明显高于微波的循环频率，并且微波束功率为远低于激发自持等离子体形成的阈值。首次，