摘要
研究了高流强电子束(1-10μA)在单根锥形SiO2毛细管中的导向效应,测量了出射电子的角分布,分析了入射能量对电子传输效率的影响。实验发现:出射电子呈高斯分布且时间稳定性好,随着入射能量增加,电子在毛细管中的传输效率降低,传输效率与入射能量呈负指数关系。实验结果与导向效应模型符合得很好。
The transmission of strong beam electrons(1 to 10 μA) through a tapered SiO2 capillary was investigated.The time dependence of the total transmitted fraction and one-dimension angular distribution of transmitted electrons were experimentally studied.The result indicates that,the transmitted electrons have the Gaussian distribution and good temporal stability;the transmitted fraction decreases with the incident energy in a negative exponential manner,and this dependence is supported by the guiding effect model.
出处
《强激光与粒子束》
EI
CAS
CSCD
北大核心
2011年第4期1065-1067,共3页
High Power Laser and Particle Beams
基金
国家自然科学基金项目(10775160)
关键词
电子束
锥形毛细管
导向效应
角分布
传输效率
electron beam
tapered capillary
guiding effect
angular distribution
transmitted fraction