Abstract
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 language | English |
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Article number | 103129 |
Number of pages | 5 |
Journal | Physics of Plasmas |
Volume | 24 |
Issue number | 10 |
DOIs | |
Publication status | Published - 1 Oct 2017 |
Keywords
- INSTABILITIES