A Flake Graphite/Titanium Dioxide Composite Cathode for S-Band Relativistic Magnetron

被引：0

作者：

Chen, Tingxu ^{[1
]}

Yang, Liu ^{[1
]}

Fu, Hao ^{[2
]}

Li, Hao ^{[1
]}

Wang, Haiyang ^{[1
]}

Hu, Biao ^{[1
]}

Cheng, Renjie ^{[1
]}

Liu, Sidi ^{[1
]}

Li, Tianming ^{[1
]}

机构：

[1] Univ Elect Sci & Technol China, Sch Elect Sci & Engn, Chengdu 610054, Peoples R China

[2] Univ Elect Sci & Technol China, Sch Phys, Chengdu 610054, Peoples R China

来源：

IEEE TRANSACTIONS ON ELECTRON DEVICES | 2024年 / 71卷 / 10期

基金：

中国国家自然科学基金;

关键词：

Cathodes; Graphite; Plasmas; Surface treatment; Surface morphology; Explosives; Electron emission; Composite cathode; emission defects; explosive electron emission cathode; peak power; relativistic magnetron; EXPLOSIVE-EMISSION CATHODE; PLASMA; DIODE;

D O I：

10.1109/TED.2024.3437342

中图分类号：

TM [电工技术]; TN [电子技术、通信技术];

学科分类号：

0808 ; 0809 ;

摘要：

As a source of intense current electron beams, the explosive electron emission cathode has long been the key component of relativistic magnetrons (RMs). However, its application has been hampered by significant limitations: pulse shortening due to plasma expansion and microwave power degradation stemming from emission defects. To mitigate these issues, in this article, a flake graphite/titanium dioxide composite cathode (FTC) with a simple preparation process is proposed. To validate the performance of this cathode, experiments were conducted using a ten-cavity rising-sun relativistic magnetron. The results show that, in comparison to graphite cathodes, the FTC exhibits a remarkable 90 % increase in microwave output peak power and a 2-ns extension in pulsewidth. The work in this article aims to provide new ideas for relativistic magnetron cathode design.

引用

页码：6357 / 6361

页数：5

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