|TUPTS054||1st+2nd Harmonic Photocathode Bimodal Gun R&D||2054|
|SUSPFO086||use link to see paper's listing under its alternate paper code|
Funding: U.S. Dept. of Energy
A novel Bimodal Electron Gun is designed to apply microwaves at two harmonically-related frequency in a 0.6 cell RF gun to increase the RF breakdown threshold and enhance the beam quality. This stratagem is intended to allow the RF gun structure to support a high accelera-tion gradient as well as to manipulate the emittance evolution in the half cell. By selecting a proper ampli-tude ratio and phase relationship between the first and second harmonic RF field components in the gun cavity, the superposition of the harmonic field components can provide a flat-top like RF profile to omitting the RF emittance component in the gun, while increase the RF breakdown threshold. The recent status of the Bimodal Electron Gun R&D is presented, including the designs of the novel two frequency RF structure and the simulation of the beam dynamic.
|DOI •||reference for this paper ※ https://doi.org/10.18429/JACoW-IPAC2019-TUPTS054|
|About •||paper received ※ 14 May 2019 paper accepted ※ 23 May 2019 issue date ※ 21 June 2019|
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