Work

The project is dedicated to fundamental research of structural materials of linear accelerators for studying the dark current that causes high-vacuum high-gradient breakdown of the accelerating structure. The project provides for the use of the mathematical apparatus of quantum mechanics and quantum electrodynamics and computer modeling of field electron emission processes considering the morphology of the metal surface. During the implementation of the project, the theory of field electron emission from the surface of metals will be built considering the surface morphology. It is planned to study the effect of nano- and micro-size tips on the metal surface on the field emission current and the resistance of the accelerating structure material to high-vacuum viscous gradient breakdown. The project also provides for the study of the effect of point atomic-free defects on the metal surface on the field electron emission current. Such studies will allow considering the effect of voids, cracks, surface irregularities on the dark current, as a breakdown trigger. As part of the study of the modification of the metal surface, the effect of the deposition of a thin metal layer with a higher work function on the elements of the accelerating structure will be investigated to increase its resistance to breakdowns. This will make it possible to explicitly compare the current with a “clean” and modified metal surface and give recommendations on how to increase the stability of the accelerating structure to high-vacuum high-gradient breakdown.