On the expansion of non-ideal copper plasma into vacuum

被引：2
|
作者：
Levko, Dmitry [1 ]
Arslanbekov, Robert R. [1 ]
Kolobov, Vladimir, I [1 ,2 ]
机构：
[1] CFD Res Corp, 701 McMillian Way, Huntsville, AL 35806 USA
[2] Univ Alabama Huntsville, Ctr Space Plasma & Aeron Res, Huntsville, AL 35899 USA
来源：
PHYSICS OF PLASMAS | 2020年 / 27卷 / 08期
关键词：
CATHODE; SIMULATION; STATE;
D O I：
10.1063/1.5144684
中图分类号：
O35 [流体力学]; O53 [等离子体物理学];
学科分类号：
070204 ; 080103 ; 080704 ;
摘要：
The expansion of non-ideal copper plasma into vacuum is analyzed for the conditions typical for explosive electron emission in vacuum arcs. The computational model solves the Euler equations with an equation of state (EoS) for weakly non-ideal plasma, taking into account the ionization energy correction due to electron-ion Coulomb coupling. We have ascertained that the EoS has insignificant influence on the plasma expansion while the plasma properties and composition change drastically. Based on our simulation results, we discuss the validity of the "frozen" state theory often used in the vacuum arc plasma diagnostics.
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页数：8
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