Speaker
Description
Ultra-High brightness electron sources are enabling technologies for frontier applications of electron accelerators, such as FEL, UED, and UEM. Due to the higher cathode acceleration gradients and lower initial thermal emittance at cryogenic temperatures, cryogenic copper radio-frequency electron guns have the potential to achieve higher brightness. In this paper, a 2.5-cell C-band cryogenic copper RF gun operating at 77 K has been desinged, which requires the accelerating gradient on the cathode to exceed 180 MV/m. The cavity geometry is automatically optimized in CST to reduce the modified Poynting vector and pulsed heating temperature. A mode converter coupler is applied to maintain the symmetry of the electromagnetic field, which can reduce emittance growth caused by multipole modes. The fabrication of this electron gun has already been started and high-power conditioning is expected to begin in August 2025.
| Region represented | Asia |
|---|---|
| Paper preparation format | Word |
