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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.)
2021

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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
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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.). "Modelling Seeded Self Modulation of Long Elliptical Bunches in Plasma." (2021) Brazil