Dresden 2017 – wissenschaftliches Programm

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AKBP: Arbeitskreis Beschleunigerphysik

AKBP 2: New Accelerator Concepts II

AKBP 2.2: Vortrag

Dienstag, 21. März 2017, 09:45–10:00, MOL 213

Intrinsic elimination of the numerical Cherenkov instability in Lorentz-boosted frame simulations of plasma accelerators — •Manuel Kirchen, Irene Dornmair, Sören Jalas, Kevin Peters, and Andreas R. Maier — Center for Free-Electron Laser Science & Department of Physics, University of Hamburg, 22761 Hamburg, Germany

We present a novel Particle-In-Cell algorithm that is intrinsically free of the numerical Cherenkov instability for relativistic plasmas flowing at a uniform velocity. The new method is independent of the geometry and - unlike previous suppression strategies - we completely avoid artificial modifications of the electromagnetic fields. Application is shown at the example of Lorentz-boosted frame simulations of plasma accelerators, achieving excellent accuracy and high speed-ups using our spectral, quasi-3D GPU code FBPIC.