Modeling the saturation of the multipactor effect in a dielectric-loaded parallel-plate waveguide

被引:4
|
作者
Zhai, Yonggui [1 ]
Wang, Hongguang [1 ]
Cao, Meng [1 ]
Weng, Ming [1 ]
Lin, Shu [1 ]
Peng, Min [1 ]
Chen, Kun [2 ]
Wang, Rui [1 ,3 ]
Li, Yun [3 ]
Cui, Wanzhao [3 ]
Chen, Jun [4 ]
Li, Yongdong [1 ]
机构
[1] Xi An Jiao Tong Univ, Sch Elect Sci & Engn, Minist Educ, Key Lab Phys Elect & Devices, Xian 710049, Shaanxi, Peoples R China
[2] Northwest Inst Nucl Technol, Sci & Technol High Power Microwave Lab, Xian 710024, Peoples R China
[3] China Acad Space Technol Xian, Natl Key Lab Sci & Technol Space Microwave, Xian 710100, Peoples R China
[4] Xi An Jiao Tong Univ, Sch Human Settlements & Civil Engn, Xian 710049, Shaanxi, Peoples R China
基金
中国博士后科学基金; 中国国家自然科学基金;
关键词
MAGNETIC-FIELD; DISCHARGE; BREAKDOWN; EMISSION;
D O I
10.1063/5.0080741
中图分类号
O59 [应用物理学];
学科分类号
摘要
The aim of this paper is to establish a numerical simulation model for the multipactor effect in a partially dielectric-loaded parallel-plate waveguide, with a focus on the investigation of multipactor saturation mechanisms for different dielectric materials with different secondary emission yield (SEY) properties. An electrostatic method involving the radio-frequency fields, space charge fields, and the dynamics of charge accumulation on the dielectric surface and solutions for electrostatic fields are proposed. The evolution of the electron number, accumulated charge, and secondary electron multiplication rate for different input voltages and SEY properties of the dielectric materials are studied using numerical calculations. The results show that two physical multipactor phenomena occur in a dielectric-loaded parallel-plate waveguide: a self-sustaining phenomenon, which means that the electron population reaches a saturation level, and a self-extinguishing phenomenon. The latter can be divided into two cases: in one, the number of electrons undergoes a process of multiplication, saturation, and reduction, and in the other, the number of electrons disappears after their population reaches a maximum. Furthermore, a multipactor susceptibility diagram for SEY curves of different dielectric materials is constructed. The results show that the multipactor effect is suppressed when the maximum of the SEY curve is less than 1.3.
引用
收藏
页数:13
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