1–6 Jun 2025
Taipei International Convention Center (TICC)
Asia/Taipei timezone

Simulations of ion bombardment in thermionic cathode RF guns

TUPS128
3 Jun 2025, 16:00
2h
Exhibiton Hall A _Salmon (TWTC)

Exhibiton Hall A _Salmon

TWTC

Poster Presentation MC3.T02 Electron Sources Tuesday Poster Session

Speaker

Jonathan Edelen (RadiaSoft (United States))

Description

Thermionic cathodes are well known as a robust source of electrons for a wide range of accelerator applications. In the case of Barium Oxide cathodes the low work function that allows emission at modest temperatures is achieved through a surface coating. This coating can be damaged from both ion bombardment and, in the case of RF sources, electron bombardment. Lifetime models that predict the dynamics of these coatings are based on DC electron guns. Understanding the dynamics of ion bombardment in thermionic RF electron guns and under operational conditions is paramount to understanding cathode lifetime and optimizing performance. In this paper we simulate the generation of ions through impact ionization in the APS electron gun. We then compute the energy distribution of ions deposited on the cathode and effective ionization cross section as we vary operational conditions. These simulations are compared with analytical calculations based on first principles.

Funding Agency

This material is based upon work supported by the U.S. Department of Energy, Office of Science, Office of Accelerator Research Development and Production award number DE-SC0025370.

Region represented America
Paper preparation format LaTeX

Author

Jonathan Edelen (RadiaSoft (United States))

Co-authors

Kathryn Wolfinger (RadiaSoft (United States)) Nathan Cook (RadiaSoft (United States))

Presentation materials

There are no materials yet.