10th International Workshop on the Mechanisms of Vacuum Arcs (Hybrid MeVArc 2022)

An influence of the cathode surface morphology on the dark current and high-gradient high-vacuum breakdown of the accelerating structures.

20 Sept 2022, 16:30

10m

Chania, Crete

Poster Field emission Poster Session

Speaker

Yuliia Lebedynska (Institute of Applied Physics, National Academy of Sciences of Ukraine)

Description

One of the main directions of development of acceleration technology is to increase the acceler ation rate to 100 MV / m, as, for example, in projects Compact LInear Collider (CLIC), International Linear Collider (ILC), which will reduce the linear dimensions of modern electronic accelerators, make them more compact and achieve record acceleration energies of charged particle beams (of the order of several TeV). Since each breakdown leads to a loss of the charged particles beam density and damage to the surface of the material, various methods of increasing the resistance to high-gradient breakdown of the accelerating structure are investigated. One way to solve the problem of high-vacuum high-gradient breakdowns is to reduce the field emission current density. A model of field emission current which constructs considering the morphology of the cathode surface and the influence of metal surface modification on the field emission current in the case of multilayer metal-metal-vacuum systems is theoretically investigated at this work.

Presentation materials

Poster MeVArc2022 (Kholodov).pdf