We investigated the transmission of 10 keV electrons through insulating nanocapillaries of various diameters from 200 nm up to 800 nm with high intensity current (∼56 nA/mm 2 ). We demonstrate a way to identify the quasi-elastic transmission from the total transmission by looking at the characteristic X-rays induced by the transmitted electrons. It shows that the transmitted electrons follow the geometrical transmission with a little deviation. The portion of the nearly elastic transmission is found to be higher for the insulating channels with the diameter of 800 nm. The data obtained allow us to evaluate the possibility of controlling a beam of accelerated electrons using dielectric nanocapillaries.
Passage of a 10-keV electron beam through a bundle of hollow polysulfone fiber with an inner channel diameter of 160 ± 60 μm was studied. The dependence of the electron beam that passed through the channels on the channel tilt angle with respect to the incident beam axis was measured. The fraction of electrons with an energy loss of less than 10% after passing the channels was also estimated.
Transmission of 10-keV electrons through a ceramic macrocapillary in the geometry, where the channel axis is oriented parallel to the incident-beam axis, has been studied experimentally. The current and energy spectrum of electrons passing through the channel have been measured depending on the incident beam current and the channel irradiation time. It is demonstrated that the transmission of electrons through a sample depends on the time that has passed after the formation of a conducting carbon deposit on the inner surfaces of both end faces of the channel.
⎯The results of the study of the 10-keV electron beam transmission through cylindrical dielectric macrochannels with various lengths. All channels made of polyethylene terephthalate had an identical inner diameter of 1.55 mm and lengths of 20, 30, 35, 40, 45, and 50 mm. The dependence of the current passed through beam channels on their tilt angle relative to the incident electron beam is measured. The electron beam fraction suffered energy losses no more than 1 keV after passing through the dielectric channel is estimated. The dependence of the maximum electron transport through channels on their length is also studied. The data obtained show that the passed current intensity weakly depends on channel lengths in the length range of 20-50 mm under study. These results can be explained by the fact that such a dynamic charge distribution is formed on channel walls, which provides the best conditions of electron transport through the dielectric channel.
We present the scope of research of a new collaboration FLAP (Fundamental & applied Linear Accelerator Physics collaboration) devoted to the study of the basics of electromagnetic interactions and new applications of controllable generation of electromagnetic radiation by relativistic electrons using functional materials.
scite is a Brooklyn-based organization that helps researchers better discover and understand research articles through Smart Citations–citations that display the context of the citation and describe whether the article provides supporting or contrasting evidence. scite is used by students and researchers from around the world and is funded in part by the National Science Foundation and the National Institute on Drug Abuse of the National Institutes of Health.