3-D simulation study for a thermionic RF gun using an FDTD method

H. Hama, F. Hinode, K. Shinto, A. Miyamoto, T. Tanaka

Research output: Contribution to journalConference articlepeer-review

19 Citations (Scopus)


Beam dynamics in a thermionic RF gun for a new pre-injector in a future synchrotron radiation facility at Tohoku university has been studied by developing a 3-D Maxwell's equation solver. Backbombardment (BB) effect on a cathode, which is a crucial problem for performance of the thermionic RF gun, has been investigated. It is found that an external dipole magnetic field applying around the cathode is effective to reduce high-energy backstreaming electrons from the accelerating cell. However, the low-energy electrons coming back from the first cell inevitably hit the cathode, so that characteristics of the cathode material seems to be crucial for reduction of the BB effect.

Original languageEnglish
Pages (from-to)371-377
Number of pages7
JournalNuclear Instruments and Methods in Physics Research, Section A: Accelerators, Spectrometers, Detectors and Associated Equipment
Issue number1-2
Publication statusPublished - 2004 Aug 1
EventProceedings of the 25th International Free Electron Laser - Tsukuba,Ibaraki, Japan
Duration: 2003 Sept 82003 Sept 12


  • Backbombardment
  • FDTD method
  • Thermionic RF gun


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