Design and Simulation of Novel Field Emission X-Ray Tube Electron Optical System [场发射X射线管电子光学系统的设计和研究] - 文章详情页

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摘要：

Herein,we　reportedthedevelopment　of　X-ray　tube　electron　optical　system.First,a　Mo-tip　field　emission　array　cathode　without　grid　electrodes　was　fabricated.At　3400　V,the　emission　current　and　current　density　were　1.46　mA　and　516.4　mA/cm　2　,respectively.Next,the　X-ray　tube　electron　optical　system,comprising　the　emission　array　cathode,focusing　electrode　and　anode,was　modeled　and　simulated　with　software　CST　particle　studio　for　design　optimization.The　simulated　results　show　that　novel　Mo-tipfield　emission　array　was　a　reliable　electron　source　for　the　X-ray　tube.For　example,the　optimized　electron　optical　system　has　the　electric　field　of　4.7　V/μm　(　the　onset　field　of　3　V/μm),cathode　area　of　10　mm×2　mm,and　total　emission　current　of　10　mA.Finally,the　X-ray　emission　was　evaluated.Irradiating　at　30°,the　1　mm×1　mm　emission　electron　beam　generated　an　X-ray　effective　focal　spot　of　0.58　mm×1　mm,satisfying　the　requirements　of　X-ray　tube.　©　2018,　Journal　of　Vacuum　Science　and　Technology　Publishing　House.　All　right　reserved.

关键词：

Beam spot; Electron optics; Field emission; X-ray tube

作者机构：

[ 1 ] [Luo, D.]School of materials Science and Engineering, Beijing University of Technology, Beijing, 100124, China
[ 2 ] [Li, X.]National Key Laboratory of Science and Technology on Vacuum Electronics, Beijing Vacuum Electronics Research Institute, Beijing, 100015, China
[ 3 ] [Zhang, Q.]National Key Laboratory of Science and Technology on Vacuum Electronics, Beijing Vacuum Electronics Research Institute, Beijing, 100015, China
[ 4 ] [Hu, Y.]National Key Laboratory of Science and Technology on Vacuum Electronics, Beijing Vacuum Electronics Research Institute, Beijing, 100015, China
[ 5 ] [Liu, W.]School of materials Science and Engineering, Beijing University of Technology, Beijing, 100124, China
[ 6 ] [Feng, J.]National Key Laboratory of Science and Technology on Vacuum Electronics, Beijing Vacuum Electronics Research Institute, Beijing, 100015, China
[ 7 ] [Wang, J.]School of materials Science and Engineering, Beijing University of Technology, Beijing, 100124, China

通讯作者信息：

[Liu, W.]School of materials Science and Engineering, Beijing University of TechnologyChina

电子邮件地址：

liuw@bjut.edu.cn

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