The Study Of The Dynamic Of The Slow Electrons Transmitted Through Straight Glass Capillary And Tapered Glass Capillary

In this work, we investigate 2-D angular distribution of transmitted electrons for 1.5 ke V electron through glass straight tube and tapered capillaries, which include two parts mainly.Dynamic transmission of interaction between low energy electron and insulating glass tube,the quickly charge-discharge phenomenon was observed in straight tube and tapered capillaries:the transmitted electrons tend to be a weak pot at the beginning of the measurements, whereafter the weak pot become observably, then become bigger and brighter further. In the end of the measurement, the bright pot disappeared rapidly. Moreover, the centroid outgoing angle of the transmitted electrons shifted during the charge-discharge process, the angular distribution of electrons through tapered capillary was wider than straight tube, and shorter charge-discharge time than straight tube, the density of transmitted electrons through tapered capillary was bigger about 40% than straight tube for focusing effect on low energy electrons. The dynamic transmission of electrons show a significant differ with high charged ions(HCI), the rapidly charge-discharge of electrons suggested a distinct with positive ions through insulating nanocapillaries.We have investigated the whole angular distribution for electrons through straight tube with different deflection angles, discovered the decrease of transmitted electrons as the increasing the incident angle, and shift of the centroid outgoing angle, which equate to the incident angle. The transmitted electrons can still be observed even the glass tube tilted to ±0.8°when a glass tube with a geometry opening angle of 1o, this result was agreement with 3 ke V Ne7+ through PET nanocapillaries performed by Stolterfoht.