Plasmas fluxes to surfaces for an oblique magnetic field
- Canadian Fusion Fuels Technology Project, Toronto, ON (Canada)
- Toronto Univ., ON (Canada)
- Princeton Univ., NJ (United States). Plasma Physics Lab.
The poloidal and toroidal spatial distributions of D{sub {alpha}}, He I and C II emission have been obtained in the vicinity of the TFTR bumper limiter and are compared with models of ion flow to the surface. The distributions are found not to agree with a model (the ``Cosine`` model) which determines the incident flux density using only the parallel fluxes in the scrape-off layer and the projected area of the surface perpendicular to the field lines. In particular, the Cosine model is not able to explain the significant fluxes observed at locations on the surface which are oblique to the magnetic field. It is further shown that these fluxes cannot be explained by the finite Larmor radius of impinging ions. Finally, it is demonstrated, with the use of Monte Carlo codes, that the distributions can be explained by including both parallel and cross-field transport onto the limiter surface.
- Research Organization:
- Princeton Univ., NJ (United States). Plasma Physics Lab.
- Sponsoring Organization:
- USDOE, Washington, DC (United States)
- DOE Contract Number:
- AC02-76CH03073; AC04-76DP00789; FG05-90ER54091
- OSTI ID:
- 10166895
- Report Number(s):
- PPPL-2847; CONF-920311-21; ON: DE92018434
- Resource Relation:
- Conference: 10. international conference on plasma-surface interactions in controlled fusion devices,Monterey, CA (United States),30 Mar - 3 Apr 1992; Other Information: PBD: Jul 1992
- Country of Publication:
- United States
- Language:
- English
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