Parallel momentum input by tangential neutral beam injections in stellarator and heliotron plasmas
- Graduate School of Energy Science, Kyoto University, Uji 611-0011 (Japan)
The configuration dependence of parallel momentum inputs to target plasma particle species by tangentially injected neutral beams is investigated in non-axisymmetric stellarator/heliotron model magnetic fields by assuming the existence of magnetic flux-surfaces. In parallel friction integrals of the full Rosenbluth-MacDonald-Judd collision operator in thermal particles' kinetic equations, numerically obtained eigenfunctions are used for excluding trapped fast ions that cannot contribute to the friction integrals. It is found that the momentum inputs to thermal ions strongly depend on magnetic field strength modulations on the flux-surfaces, while the input to electrons is insensitive to the modulation. In future plasma flow studies requiring flow calculations of all particle species in more general non-symmetric toroidal configurations, the eigenfunction method investigated here will be useful.
- OSTI ID:
- 22490162
- Journal Information:
- Physics of Plasmas, Vol. 22, Issue 9; Other Information: (c) 2015 AIP Publishing LLC; Country of input: International Atomic Energy Agency (IAEA); ISSN 1070-664X
- Country of Publication:
- United States
- Language:
- English
Similar Records
Influence of beam orbit loss on radial electric field in NBI heated heliotron/torsatrons
Pump limiter studies on the Heliotron-E device
Related Subjects
AXIAL SYMMETRY
BEAM INJECTION
COLLISIONS
EIGENFUNCTIONS
ELECTRONS
FRICTION
HELIOTRON
INTEGRALS
KINETIC EQUATIONS
MAGNETIC FIELDS
MAGNETIC FLUX
MAGNETIC SURFACES
MODULATION
NEUTRAL PARTICLES
PARTICLE BEAMS
PLASMA
SPACE DEPENDENCE
STELLARATORS
TOROIDAL CONFIGURATION
TRAPPING