Speaker
Description
Charged-particle beams with intense longitudinal fields in accelerating structures inevitably couple to transverse modes, potentially causing beam break-up instability. To maintain beam quality in applications like linear colliders, addressing this coupling is crucial. Flat-beams, featuring highly asymmetric transverse sizes, can delay the initial instability in slab-symmetric structures. However, this only serves as a temporary solution. In exploring the hazards of transverse coupling, our experiment focuses on a flat-beam near a planar dielectric lined structure. Measurements unveil a novel skew-quadrupole-like interaction when the beam is canted transversely, absent when the flat-beam is parallel to the dielectric surface. Using a multipole field fitting algorithm, we reconstruct transverse wakefields and generate an effective kick vector map through a theoretical model and particle-in-cell (PIC) simulations for realistic particle distributions.
Funding Agency
This work is supported by the U.S. Department of Energy, Office of High Energy Physics, under Contracts DE-SC0017648 (UCLA), DE-SC0022010 (NIU), and DE-AC02-06CH11357 (ANL).
| Region represented | North America |
|---|---|
| Paper preparation format | LaTeX |
