铁电阴极电子枪的初步实验研究  

Preliminary study of ferroelectric electron gun

作　　者：朱子秋[1] 郑曙昕[1] 廖树清[1] 程诚[1] 邢庆子[1] 李泉凤[1] 

机构地区：[1]清华大学工程物理系加速器实验室,北京100084

出　　处：《强激光与粒子束》2008年第3期521-524,共4页High Power Laser and Particle Beams

摘　　要：设计加工了铁电阴极电子枪,给出了模拟计算及其初步实验结果。电子枪为皮尔斯枪型,采用顺电相陶瓷Ba0.67Sr0.33TiO3作为铁电阴极材料,电子枪电压脉宽80 ns,幅值最大可达80 kV,设计电子枪导流系数为0.15×10-6A.V-3/2。电子枪电压从30 kV逐步增大到56 kV,测量到其发射电流从0.7 A逐步增大到2.5 A。根据实验结果拟合得到的电子枪导流系数为0.2×10-6A.V-3/2,与设计基本符合。A ferroelectric electron gun was designed and fabricated. The simulation and preliminary experimental results of the gun are reported. The gun uses a planar Ba0.67Sr0.33TiO3 （BST67/33）cathode in a Pierce geometry. The gun voltage can reach 80 kV with the pulse width of 80 ns. The designed perveance of the gun is 0.15×10^-6 A·V^-3/2. In the experiment, the gun voltage gradually increases from 30 kV to 56 kV, and the emission current increases from 0.7 A to 2.5 A. The perveance of the gun is measured as 0.2×10^-6 A·V^-3/2, mearly the same as the designed value.

关 键 词：铁电阴极 电子枪 加速器 导流系数 

分 类 号：O462[理学—电子物理学]