Plasma transport in a simulated magnetic-divertor configuration
The transport properties of plasma on magnetic field lines that intersect a conducting plate are studied experimentally in the Wisconsin internal ring D.C. machine. The magnetic geometry is intended to simulate certain aspects of plasma phenomena that may take place in a tokamak divertor. It is found by a variety of measurements that the cross field transport is non-ambipolar; this may have important implications in heat loading considerations in tokamak divertors. The undesirable effects of nonambipolar flow make it preferable to be able to eliminate it. However, we find that though the non-ambipolarity may be reduced, it is difficult to eliminate entirely. The plasma flow velocity parallel to the magnetic field is found to be near the ion acoustic velocity in all cases. The experimental density and electron temperature profiles are compared to the solutions to a one dimensional transport model that is commonly used in divertor theory.
- Research Organization:
- Wisconsin Univ., Madison (USA)
- Sponsoring Organization:
- USDOE
- DOE Contract Number:
- AS02-76ET53051
- OSTI ID:
- 6435618
- Report Number(s):
- DOE/ET/53051-20
- Country of Publication:
- United States
- Language:
- English
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