Speakers
Description
Plasma wakefield accelerators (PWFAs) driven by flat (transversely asymmetric) beams naturally excite non-axisymmetric blowout cavities. The resulting wakefields exhibit transversely non-uniform accelerating fields and transverse focusing forces with a nontrivial dependence on the co-moving longitudinal coordinate, i.e., a transverse–longitudinal wakefield coupling. Building on a recently developed analytic blowout model assuming an elliptical transverse blowout boundary, we further analyze this coupling in flat-beam PWFAs, consistently constrained by the Panofsky–Wenzel theorem, and quantify the coefficients for such dependence. Finally, we address how the hosing instability can be modified and possibly mitigated by the induced slice-dependent focusing. The analytic predictions for the transverse–longitudinal coupling and hosing mitigation are compared to the results from Particle-in-Cell (PIC) simulations.
Funding Agency
This work was performed with support of the US Dept. of Energy, Division of High Energy Physics, under contract no. DE-SC0017648 and DESC0009914.
| In which format do you inted to submit your paper? | LaTeX |
|---|---|
| Preprint marking on your proceeding paper | I wish my paper to be marked as preprint. |