Abstract
Interaction of fast ions with externally driven poloidally propagating electrostatic waves in tokamaks is investigated. It is found that net power transfer from the ions to high frequency waves (well above the ion gyrofrequency) by the expansion free energy of ions sustained by an isotropic steady source is not possible unless there are special absorbing boundaries on the low energy side or reflecting boundaries on the high energy side of the ion diffusion paths for a well localized wave structure. Enhanced wave‐driven fast ion current is found to follow from the asymmetry in parallel wavenumber spectrum created by the finite poloidal magnetic field. In the presence of intense well‐penetrated waves the current carried by fusion α particles can be controlled by the choice of the poloidal wavenumber spectrum and the total current can greatly exceed the neoclassical bootstrap current of the α particles in a reactor.
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
