Emission Characteristics of Nanosized Scandia-Doped Dispenser Cathodes in Open Electron-Gun Structures

被引：32

作者：

Liu, Wei ^{[1
]}

Wang, Yiman ^{[1
]}

Wang, Jinshu ^{[1
]}

Wang, Yanchun ^{[2
]}

Vancil, Bernard ^{[3
]}

机构：

[1] Beijing Univ Technol, Sch Mat Sci & Engn, Beijing 100124, Peoples R China

[2] Tsinghua Univ, Beijing 100084, Peoples R China

[3] E Beam Inc, Beaverton, OR 97008 USA

来源：

IEEE TRANSACTIONS ON ELECTRON DEVICES | 2011年 / 58卷 / 04期

关键词：

Pierce electron gun; scandate cathode; thermionic emission; vacuum electron devices (VEDs);

D O I：

10.1109/TED.2011.2105877

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：

The emission properties of nanosized scandia-doped dispenser cathodes tested in open-structure Pierce electron guns are reported in this paper. Over 100 A/cm(2) and over 80 A/cm(2) space-charge-limited current densities have been obtained at the operating temperatures of 950 degrees C(b) and 1025 degrees C(b) for cathodes with planar emitting surfaces and cathodes with concave emitting surfaces, respectively, at rated anode voltages.

引用

页码：1241 / 1246

页数：6

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