Abstract
Specific features of charged particle confinement and ripple transport in the low-collision frequency (1/ν) regime have been investigated in stellarator-type devices with discrete toroidal or modular field coils. For such stellarator configurations, a multiple-helicity and a multiple-toroidicity character of the magnetic field is typical, manifested itself in the presence of the distant harmonics εj,N with high-order N⩾2 toroidal mode numbers in a Fourier-decomposition of the magnetic field. The main purpose of the paper was an analysis of the role of these distant harmonics in controlling both direct and indirect losses of charged particles in stellarators. It has been discovered that in configurations, as considered, the level of the neoclassical transport in the 1/ν regime can be one order reduced by properly chosen coil currents generated in Fourier decomposition, the distant N=2 satellite harmonics with strong amplitudes and suitable ripple phases.
Sign-in/Register to access full text options 
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.
