Effect of the expanding explosive-emission centers plasma on the impedance of a high-current diode

被引：24

作者：

Belomyttsev, SY ^{[1
]}

Korovin, SD ^{[1
]}

Pegel, IV ^{[1
]}

机构：

[1] Russian Acad Sci, Inst High Current Elect, Siberian Div, Tomsk 634055, Russia

来源：

IEEE TRANSACTIONS ON PLASMA SCIENCE | 1999年 / 27卷 / 06期

关键词：

blade-type cathode; child-langmuir's law; cathode plasma expansion; diode impedance; diode pervence; discontinuity of emission surface; expanding hemispherical plasma emitter; explosive-emission (cold) cathode; high-current planar electron diode; periodic cathode structure; space-charge limited current; time dependence of current; time dependence of diode impedance; 3/2-power law; stability (time constancy) of current;

D O I：

10.1109/27.808928

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：

Formulas for the space-charge-limited electron current in a planar diode with a small hemispherical or hemi-cylindrical plasma emitter have been obtained theoretically and by a numerical simulation. For a periodic cathode structure of hemispherical emitters, an approximate expression for current is derived. Based on these results, the increase in current with time in high-current explosive-emission diodes is explained, A condition has been found under which the expanding cathode plasma has no effect on the diode impedance. This is related to the electric field pressure on the cathode. A configuration of the cathode surface has been proposed which provides realization of this condition.

引用

页码：1572 / 1577

页数：6

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