Simulation of transport in the central cell of a tandem mirror
The tokamak radial transport code was modified to include end loss terms for simulation of the central cell plasma in a tandem mirror. The plug is described using zero dimensional particle and energy balance equations with fixed radial profiles. Calculations have been done using classical transport coefficients and plasma parameters of the Wisconsin tandem device PHAEDRUS. The results show that radial ion conduction loss is not negligible compared with axial energy loss. If the transport coefficients are a few times the classical values, a beneficial effect accrues because a lower T/sub i/ leads to better axial confinement. Then, for the same injected power in the end plugs, both T/sub e/ and the plug density can be higer. Thus, phi/sub e/ is higher. When the transport coefficients are ten times the classical values, T/sub i/ decreases from 17 eV to 10 eV in PHAEDRUS. Radial electron conduction losses are small. A value of kappa/sub e//sup classical/ does not appreciably alter the energy balance picture. Radial particle loss is small. The equilibrium radial plasma profiles in the central cell tend to follow those of the plug. A flat ion energy profile with moderately flat density profile in the plug yields a flat ambipolar profile in the central cell.
- Research Organization:
- Wisconsin Univ., Madison (USA). Dept. of Nuclear Engineering
- DOE Contract Number:
- ET-78-C-02-4710
- OSTI ID:
- 6426428
- Report Number(s):
- UWFDM-268; CONF-781053-10; TRN: 79-007458
- Resource Relation:
- Conference: APS plasma physics meeting, Colorado Springs, CO, USA, 30 Oct 1978
- Country of Publication:
- United States
- Language:
- English
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