| Paper | Title | Page |
|---|---|---|
MOPB020 |
Investigation of Multipole Field Effects and Cavity Shape Optimization for Lower Emittance in Rf Guns | |
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| The presence of multipole fields in an RF gun leads to an increase in the emittance and energy spread of the electron beam. In an RF gun with cylindrical symmetry, when fed through a single port, the quadrupole field components near the axis are larger than the dipole field components. In order to achieve lower emittance and energy spread, it is necessary to study the effect of cavity shape on the multipole fields and eliminate the impact of multipole fields on the electron beam emittance in the RF gun. In this paper, we investigated the multipole field components of three different cavity shapes, and ultimately found that both the racetrack-shaped cavity and the elliptical cylindrical cavity have smaller multipole field components compared to the cylindrical cavity. | ||
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