Speaker
Description
Flat-beam plasma wakefield acceleration can produce asymmetric blowout cavities, requiring theoretical descriptions beyond the usual cylindrically symmetric blowout model. We present a simulation comparison of a multipole expansion for an asymmetric delta-sheath blowout model in flat-beam plasma wakefield acceleration. From simulation data, we extract the multipole moments of the wake potential together with the corresponding delta-sheath boundary. The accuracy of the truncated expansion is quantified by reconstructing electromagnetic fields inside the blowout cavity and evaluating their residuals against the simulation data. We find that the quadrupole approximation captures the dominant elliptic deformation and remains useful as an analytically tractable working model. These results provide numerical support for future self-consistent modeling of blowout cavities and their associated wakefields.
| Working group | WG3 |
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