2015/03/13 by S. Kawata, T. Karino · 15 citations
Engineering · Physics and Astronomy · #Control theory (sociology) #Instability #Laser-Plasma Interactions and Diagnostics #Magnetic confinement fusion research #Oscillation (cell signaling) #Particle accelerators and beam dynamics #Perturbation (astronomy) #Superposition principle #Wavelength #physics.flu-dyn #physics.plasm-ph #physics.pop-ph
paper · pdf · doi:10.1063/1.4917340
published in Physics of Plasmas 22(4) (American Institute of Physics) · 12 pages; 3 figures. Submitted to Phys. of Plasmas
arxiv created 2015/03/13 · openalex publication_date 2015/04/01 · arxiv updated 2015/06/24 · openalex created_date 2016/06/24 · openalex updated_date 2026/08/05
A dynamic mitigation mechanism for instability growth was proposed and discussed in the paper [S. Kawata, Phys. Plasmas 19, 024503 (2012)]. In the present paper, the robustness of the dynamic instability mitigation mechanism is discussed further. The results presented here show that the mechanism of the dynamic instability mitigation is rather robust against changes in the phase, the amplitude, and the wavelength of the wobbling perturbation applied. Generally, instability would emerge from the perturbation of the physical quantity. Normally, the perturbation phase is unknown so that the instability growth rate is discussed. However, if the perturbation phase is known, the instability growth can be controlled by a superposition of perturbations imposed actively: If the perturbation is induced by, for example, a driving beam axis oscillation or wobbling, the perturbation phase could be controlled, and the instability growth is mitigated by the superposition of the growing perturbations.