Speaker
Description
We introduce the Azimuthal Modulation Method (AMM), a technique for precisely sculpting the electromagnetic fields in RF cavities to enable multipole-free acceleration or bespoke transverse kicking. The AMM provides fine control over multipolar field components, allowing suppression of unwanted multipoles (such as those arising from ancillary elements like single-slot power couplers) or the intentional introduction of desired multipoles for novel accelerator applications.
RF cavities are typically designed to operate in TM_{m10} modes, with m=0 modes providing acceleration and m>0 modes delivering transverse kicks, analogous to the m-pole fields of magnets. These cavities often have circularly symmetric cross-sections; breaking this symmetry inevitably generates unwanted transverse multipoles that can degrade beam quality. The AMM offers a systematic approach to mitigate these effects while expanding the design space for next-generation particle accelerators.
