Generation of controllable plasma wakefield noise in particle-in-cell simulations

N. Moschuering, H. Ruhl, R. I. Spitsyn, K. V. Lotov

Research output: Contribution to journalArticlepeer-review

1 Citation (Scopus)


Numerical simulations of beam-plasma instabilities may produce quantitatively incorrect results because of unrealistically high initial noise from which the instabilities develop. Of particular importance is the wakefield noise, the potential perturbations that have a phase velocity which is equal to the beam velocity. Controlling the noise level in simulations may offer the possibility of extrapolating simulation results to the more realistic low-noise case. We propose a novel method for generating wakefield noise with a controllable amplitude by randomly located charged rods propagating ahead of the beam. We also illustrate the method with particle-in-cell simulations. The generation of this noise is not accompanied by parasitic Cherenkov radiation waves.

Original languageEnglish
Article number103129
Number of pages5
JournalPhysics of Plasmas
Issue number10
Publication statusPublished - 1 Oct 2017




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