低能电子在外层导电屏蔽的玻璃锥管中的传输

发布时间：2018-06-20 07:53

本文选题：电子 + 导电效应　；参考：《物理学报》2017年12期

【摘要】：采用新的具有常数锥角的玻璃锥管,并对玻璃锥管进行了外表面导电屏蔽,通过对电子穿越玻璃锥管的二维角分布随时间演化的观测,研究了低能电子与玻璃管相互作用的机制.发现电子穿越完全放电的玻璃锥管时穿透率先下降后平稳,整个过程中角分布中心发生微小移动,但角分布的半高宽几乎保持不变.这与我们之前发表的工作(2016 Acta Phys.Sin.65 204103)不同,这是由于对玻璃锥管进行外表面导电屏蔽会阻止外界不确定的快速充放电的影响,并形成了新的稳定放电通道,有利于实现电子的稳定穿透.电子的穿透率随倾角呈类似矩形的分布,透射电子的角分布中心伴随倾角的变化而移动,其穿透所容许的倾角与几何穿透一致.
[Abstract]:A new glass conical tube with a constant cone angle is used to shield the outer surface of the glass cone. The mechanism of the interaction between the low energy electron and the glass tube is studied through the observation of the time evolution of the two-dimensional angular distribution of the electron traversing glass cone tube. It is found that the penetration of the electron through the fully discharged glass cone is the first to fall after the drop. Stable, the angular distribution center in the whole process has little movement, but the half width of the angular distribution is almost constant. This is different from our previous work (2016 Acta Phys.Sin.65 204103), which is due to the effect of the external conductive shielding on the outer surface of the taper tube which will prevent the external undetermined rapid charge and discharge, and form a new stable release. The electrical channel is conducive to the stable penetration of electrons. The penetration rate of electrons is similar to a rectangular distribution with the dip angle. The angular distribution center of the transmission electron moves with the change of the dip angle, and the allowable angle of penetration is consistent with the geometric penetration.
【作者单位】：兰州大学核科学与技术学院;中国核动力研究设计院;ETH
【基金】：国家自然科学基金(批准号:11475075)资助的课题~~
【分类号】：O572.322

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