Research on DC-RF superconducting photocathode injector for high average power FELs

Kui Zhao, Jiankui Hao, Yanle Hu, Baocheng Zhang, Shengwen Quan, Jiaer Chen, Jiejia Zhuang

Research output: Contribution to journalConference articlepeer-review

27 Scopus citations


To obtain high average current electron beams for a high average power Free Electron Laser (FEL), a DC-RF superconducting injector is designed. It consists of a DC extraction gap, a 1+1/2 superconducting cavity and a coaxial input system. The DC gap, which takes the form of a Pierce configuration, is connected to the 1+1/2 superconducting cavity. The photocathode is attached to the negative electrode of the DC gap. The anode forms the bottom of the 1/2 cavity. Simulations are made to model the beam dynamics of the electron beams extracted by the DC gap and accelerated by the superconducting cavity. High quality electron beams with emittance lower than 3 π-mm-mrad can be obtained. The optimization of experiments with the DC gap, as well as the design of experiments with the coaxial coupler have all been completed. An optimized 1+1/2 superconducting cavity is in the process of being studied and manufactured.

Original languageEnglish (US)
Pages (from-to)564-568
Number of pages5
JournalNuclear Instruments and Methods in Physics Research, Section A: Accelerators, Spectrometers, Detectors and Associated Equipment
Issue number1-3
StatePublished - Nov 21 2001
Event22nd International Free Electron Laser Conference (FEL 2000) - Durham, NC, United States
Duration: Aug 13 2000Aug 18 2000


  • High average power FEL
  • Injector
  • Pierce configuration
  • Superconducting cavity

ASJC Scopus subject areas

  • Nuclear and High Energy Physics
  • Instrumentation


Dive into the research topics of 'Research on DC-RF superconducting photocathode injector for high average power FELs'. Together they form a unique fingerprint.

Cite this