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Conceptual study and design of A C-band photocathode injector

  • PurposeA C-band photocathode injector composed of a 3.6-cell C-band photocathode RF gun and two 1.8-m C-band accelerating structures is proposed. The injector is a low emittance electron source for free electron lasers (FEL) and other compact light sources.
    MethodsThe RF structure of the cavities is designed with 2D SUPERFISH simulation. The beam dynamic study in ASTRA helps rectify the 2D RF simulation. To feed the cavities, a design of extracoaxial coupler with RF gun structure is presented.
    ResultsWith compact focusing solenoids, for 0.25 nC bunch charge, the final energy can reach 6.9 MeV energy and the 95% emittance can be as low as 0.23 mm mrad (95%).
    ConclusionAll the details of RF design and beam dynamics studies are presented in this paper, and the design satisfied the requirements of FEL and other applications.
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  • Wencheng Fang, Lin Wang, Zhentang Zhao. Conceptual study and design of A C-band photocathode injector[J]. Radiation Detection Technology and Methods, 2019, 3(3): 39-39. DOI: 10.1007/s41605-019-0117-z
    Citation: Wencheng Fang, Lin Wang, Zhentang Zhao. Conceptual study and design of A C-band photocathode injector[J]. Radiation Detection Technology and Methods, 2019, 3(3): 39-39. DOI: 10.1007/s41605-019-0117-z

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