Propagation of 10-keV electrons through tapered glass macrocapillaries

A series of experiments is carried out to study the passage of electrons with an energy of 10 keV through glass macrocapillaries of tapered shape with an input—output diameter ratio of 1 : 10 and 1 : 5. Experiments are performed for different tilt angles of the capillaries with respect to the incident-beam axis. The results demonstrate a significant increase in the current density of a beam passed through the capillaries.