Modelling Seeded Self Modulation of Long Elliptical Bunches in Plasma

Aravinda Perera, Oznur Apsimon, Javier Resta-López, Carsten Welsch, Lin, Liu (Ed.), Byrd, John M. (Ed.), Regis Neuenschwander (Ed.), Picoreti, Renan (Ed.), Schaa, Volker R. W. (Ed.)
The stability of particle bunches undergoing seeded self-modulation (SSM) over tens or hundreds of meters is crucial to the generation of GV/m wakefields that can accelerate electron beams as proposed for use in several high energy plasma-based linear colliders. Here, 3D particle-in-cell simulations using QuickPIC are compared to an analytical model of seeded self-modulation (SSM) of elliptical beam envelopes using linear wakefield theory. It is found that there is quantitative agreement
more » ... simulations and analytical predictions for the envelope in the early growth of the SSM. A scaling law is derived for the reduction of the maximum overall modulation growth rate with aspect ratio and is found to match well with simulation.
doi:10.18429/jacow-ipac2021-thpab140 fatcat:sddcf3k3mfcvlptc7qm5w2xnga