2004/09/03 by Kazuhiro Akimoto, Akimoto, Kazuhiro, Hitoshi Hojo +1
Engineering · Physics and Astronomy · #FOS: Physical sciences #Geophysics and Sensor Technology #Magnetic confinement fusion research #Particle accelerators and beam dynamics #Plasma Physics (physics.plasm-ph) #physics.plasm-ph
paper · pdf · doi:10.48550/arxiv.physics/0409025
12th International Congress on Plasma Physics, 25-29 October 2004, Nice (France)
arxiv created 2004/09/03 · openalex publication_date 2004/09/03 · arxiv updated 2009/12/01 · openalex created_date 2025/10/10 · openalex updated_date 2026/07/28
Particle accelerations by a 1D, EM, dispersive pulse in an external magnetic field are investigated. It is found that the well-known cyclotron resonance may be classified into three regimes as the length and/or the amplitude of the pulse are varied. Namely, as the pulse amplitude increases, the transit-time cyclotron-resonance acceleration [CRA] evolves to phase trapping, and reflect particles. The amplitude and wave dispersion as well as the pulse length strongly affect those accelerations. The interesting phenomena of quantization of resonance velocities in between the two regimes are also investigated. This new mechanism may lead to wave amplification at some discrete frequencies other than the cyclotron frequency.