Development of High-Current Sheet Beam Cathodes for Terahertz Sources

被引：11

作者：

Li, Lili ^{[1
]}

Wang, Yiman ^{[1
]}

Liu, Wei ^{[1
]}

Wang, Yanchun ^{[1
]}

Wang, Jinshu ^{[1
]}

Srivastava, Anurag ^{[2
]}

So, Jin-Kyu ^{[2
]}

Park, Gun-Sik ^{[2
]}

机构：

[1] Beijing Univ Technol, Sch Mat Sci & Engn, Beijing 100022, Peoples R China

[2] Seoul Natl Univ, Dept Phys & Astron, Seoul 151747, South Korea

来源：

IEEE TRANSACTIONS ON ELECTRON DEVICES | 2009年 / 56卷 / 05期

关键词：

High current density; scandate cathode; sheet beam; Smith-Purcell radiation sources; terahertz;

D O I：

10.1109/TED.2009.2015414

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：

Generation of a sheet beam directly from a scandia-doped dispenser cathode has been investigated and optimized by means of beam-profile simulations and measurements. Rectangular beams 600 mu m wide and 100 mu m thick with current densities over 50 A/cm(2) have been generated. The beams are stable for at least several hundred hours with the cathodes operating at 950 degrees C-b, making them promising candidates for application in the next generation of terahertz vacuum electron devices such as a 0.5-THz superradiant Smith-Purcell radiation source.

引用

页码：762 / 768

页数：7

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