Cathode and plasma phenomena in vacuumarc sources of hydrogen isotope ions: I.Desorption of hydrogen isotopes during the operation of vacuum arc cathode spots

I V Uimanov; D L Shmelev; E M Oks; G Yu Yushkov; S A Barengolts

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Cathode and plasma phenomena in vacuumarc sources of hydrogen isotope ions: I.Desorption of hydrogen isotopes during the operation of vacuum arc cathode spots

机译：在真空弧形阴极斑点的操作期间，阴极和血浆现象在氢同位素离子的氢异构岩中的源极

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A model is proposed to describe the desorption of deuterium from a deuterated cathode during the operation of the vacuum arc cathode spot.The model treats a cathode spot as consisting of individual cells and involves a numerical simulation of the temperature fields that arise during the hydrodynamic processes responsible for the formation of microcraters on the cathode surface.Using a deuterated ZrD_(0.67) cathode as an example,it is shown that the amount of deuterium desorbed immediately from the crater formed during the operation of the cathode spot cells is several times smaller than the total amount of desorbed deuterium.The main portion of deuterium is desorbed from the hot cathode region adjacent to the crater and from the crater at the stage of its cooling.For a deuterated ZrD_(0.67) cathode,the percentage of desorbed deuterium can reach 80% of the total number of evaporated atoms,and it can be even greater if the cathode spot cells operate in the immediate vicinity of each other.

机译：提出了一个模型来描述真空电弧阴极点工作过程中氘从氘化阴极上的脱附。该模型将阴极斑点视为由单个电池组成，并对阴极表面形成微材料的流体动力过程中产生的温度场进行了数值模拟。以氘化ZrD_（0.67）阴极为例，结果表明，在阴极斑点电池运行期间形成的坑中立即解吸的氘量比解吸的氘总量小几倍。氘的主要部分从邻近陨石坑的热阴极区域解吸，并在冷却阶段从陨石坑解吸。对于氘化ZrD_（0.67）阴极，解吸氘的百分比可以达到蒸发原子总数的80%，如果阴极斑点电池在彼此紧邻的位置工作，解吸氘的百分比甚至可以更大。

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来源
《Plasma Sources Science & Technology》 |2020年第1期|共10页
作者
I V Uimanov; D L Shmelev; E M Oks; G Yu Yushkov; S A Barengolts;
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作者单位

Institute of Electrophysics UB RAS Ekaterinburg Russia;

Institute of Electrophysics UB RAS Ekaterinburg Russia;

Institute of High Current Electronics SB RAS Tomsk Russia;

Institute of High Current Electronics SB RAS Tomsk Russia;

Prokhorov General Physics Institute RAS Moscow Russia;

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原文格式 PDF
正文语种 eng
中图分类等离子体物理学;
关键词
vacuum arc; plasma; gas-saturated cathode; deuterium; ion beam; vacuum neutron tube;

机译：真空弧;等离子体;气体饱和阴极;氘;离子束;真空中子管;

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Cathode and plasma phenomena in vacuumarc sources of hydrogen isotope ions: I.Desorption of hydrogen isotopes during the operation of vacuum arc cathode spots

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