Speaker
Mr
Nong Xiang
(China)
Description
PIC simulations have been conducted to study the nonlinear interactions of plasmas and radio frequency wave in the ion cyclotron frequency range. It is found that in the presence of the mode conversion from an electromagnetic wave into an electrostatic wave (ion Bernstein wave), the ions near the lower hybrid resonance can be heated by nonlinear Landau damping via the parametric decay. As a result, the ion velocity distribution in the poloidal direction becomes asymmetric near the lower hybrid resonance and an ion poloidal flow is thus produced. The flow directions are opposite on both sides of the lower hybrid resonance. The poloidal flow is mainly produced by the nonlinear Reynolds stress and the electromagnetic force of the incident wave in the radial direction rather than poloidal direction predicted by the existing theories.
Country or International Organization of Primary Author
China
Collaboration (if applicable, e.g., International Tokamak Physics Activities)
Development of vorpal code
Primary author
Mr
Nong Xiang
(China)
Co-authors
Mrs
Chunyun Gan
(Institute of Plasma Physics, Chinese Academy of Sciences)
Mr
Jiale Chen
(Institute of Plasma Physics, Chinese Academy of Sciences)
Dr
John R Cary
(Center for Integrated Plasma Studies, University of Colorado at Boulder & Tech-X Corpration)
