Trapped energetic ion dynamics affected by localized electric field perturbations

• Seiya Nishimura

Abstract

Trapped energetic ion orbits in helical systems are numerically simulated using the Lorentz model. Simulation results of precession drift frequencies of trapped energetic ions are benchmarked by those of analytic solutions. The effects of the electric field perturbation localized at the rational surface on trapped energetic ions are examined, where the perturbation has an arbitrary rotation frequency and an amplitude fixed in time. It is found that the trapped energetic ions resonantly interact with the perturbation, when the rotation frequency of the perturbation is comparable to the precession drift frequencies of trapped energetic ions. The simulation results are suggestive to a mechanism of the energetic-ion-induced interchange mode, which might be associated with the fishbone mode observed in helical systems.

Journal

• Japanese Journal of Applied Physics

  Japanese Journal of Applied Physics 55 (1S), 01AH08-, 2015-12-11

  IOP Publishing

Keywords

• General Physics and Astronomy
• General Engineering

Details

• CRID: 1360847874820433280
• NII Article ID: 210000146005
• DOI: 10.7567/jjap.55.01ah08
• ISSN: 13474065
• ISSN: 00214922
• Web Site: https://iopscience.iop.org/article/10.7567/JJAP.55.01AH08
• Web Site: https://iopscience.iop.org/article/10.7567/JJAP.55.01AH08/pdf
• Data Source:
  • Crossref
  • CiNii Articles
  • KAKEN