Electron injector based on thermionic RF modulated electron gun for particle accelerator applications

Liang Zhang, Georgia Adam, Boris Militsyn, Wenlong He, Adrian W. Cross

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Abstract

In this article, the design and simulation of an electron injector based on a thermionic RF-modulated electron gun for particle accelerator applications is presented. The electron gun is based on a gridded thermionic cathode with the geometry based on a Pierce-type configuration. Both theory and numerical simulation were used to explore the relationship between the bunch length and the charge. The reasons for the pulse widening were also analyzed. The beam dynamics simulations showed that a minimum pulselength of 106 ps could be achieved with a bunch charge of 33 pC when the driving RF frequency was 1.5 GHz. The average transverse emittance was about 17 mm·mrad from the particle-in-cell simulations. Operating at a higher RF frequency did not significantly reduce the micro pulselength.
Original languageEnglish
Pages (from-to)347-353
Number of pages7
JournalIEEE Transactions on Electron Devices
Volume67
Issue number1
Early online date16 Dec 2019
DOIs
Publication statusPublished - 31 Jan 2020

Keywords

  • radio frequency (RF) gun
  • thermionic electron gun
  • particle accelerators

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