Relativistic Charged-Particle Beam Space-Charge Limited Current in Finite Length Coaxial Drift Tube

被引：2

作者：

Yatsenko, Tetyana ^{[1
]}

Sotnikov, Gennadii, V ^{[2
]}

Portillo, Salvador ^{[3
]}

Ilyenko, Kostyantyn ^{[1
]}

机构：

[1] Natl Acad Sci Ukraine, Dept Vacuum Elect, Inst Radiophys & Elect, UA-61085 Kharkov, Ukraine

[2] Kharkiv Inst Phys & Technol, Natl Sci Ctr, Dept Expt Plasma Elect & Adv Accelerator Concepts, UA-61108 Kharkov, Ukraine

[3] Univ New Mexico, Elect & Comp Engn, Albuquerque, NM 87131 USA

来源：

IEEE TRANSACTIONS ON PLASMA SCIENCE | 2019年 / 47卷 / 05期

关键词：

Finite-length coaxial drift tube; relativistic charged-particle beam; space-charge limited (SCL) current; ELECTRON-BEAMS; PLASMA;

D O I：

10.1109/TPS.2019.2909154

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：

In the strong axial (guide) magnetic field and uniform beam density approximations, we calculate scalar potential distribution induced by axisymmetric annular relativistic charged-particle beam in a finite-length coaxial drift tube. This scalar potential distribution allows us to find an approximate radial position at which the extremum of the scalar potential is attained in the coaxial drift tube inside the annular relativistic charged-particle beam. By knowing the approximate extremal radial position, we obtain the analytical estimate for the space-charge limited (SCL) current of axisymmetric annular (finite thickness) relativistic charged-particle beam propagating in strong axial magnetic field in a finite length coaxial drift tube and establish a simple correspondence of this result to that in a long coaxial drift tube. A comparison of numerical nonlinear calculations and the analytical estimate for the SCL current in the finite-length coaxial drift tube is also given.

引用

页码：2602 / 2608

页数：7

共 42 条

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