Abstract

The study of a diffuse vacuum arc (DVA) is of interest in connection with the developing methods of plasma processing of the spent nuclear fuel (SNF). This type of discharge can provide a high degree of ionization of the vapors of the cathode material in the absence of droplets and multiply charged ions. This work is devoted to the study of the ion composition of the arc discharge plasma at a consumable hot gadolinium cathode by analyzing the optical and mass spectra of ions. The plasma ion composition is determined at a discharge current of 50 A, arc voltage ranging from 4 to 14 V, and cathode temperature ranging from 1.9 to 1.95 kK. The obtained data, together with the data recorded using the condensation probe method, showed that at an arc voltage of 5 to 6 V a plasma is generated with an ionization degree close to 100%, which contains more than 95% of singly charged ions among all the charged states.

中文翻译：

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飞行时间法研究热阴极上扩散真空电弧的离子组成

摘要

扩散真空电弧（DVA）的研究与乏核燃料（SNF）的等离子体处理的开发方法有关。这种放电可以在不存在液滴和多重带电离子的情况下，使阴极材料的蒸气高度电离。这项工作致力于通过分析离子的光谱和质谱研究可消耗的热g阴极上电弧放电等离子体的离子组成。在50 A的放电电流，4到14 V的电弧电压和1.9到1.95 kK的阴极温度下确定等离子体离子组成。所获得的数据与使用凝结探针法记录的数据一起显示，在5至6 V的电弧电压下，产生的等离子体的电离度接近100％，