Structure of the plasma and energy balance near the limiter in the L-2 stellarator
The results of a study of the properties of the edge plasma in the L-2 stellator are reported. The edge plasma can be divided into three radial regions: a low density region between the wall and the separatrix ( n e ≤ 1 × 10 9 cm −3), a high gradient region near the separatrix and a region inside th...
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Published in | Journal of nuclear materials Vol. 162; pp. 831 - 838 |
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Main Authors | , , , , , , , , |
Format | Journal Article |
Language | English |
Published |
Elsevier B.V
01.04.1989
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Subjects | |
Online Access | Get full text |
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Summary: | The results of a study of the properties of the edge plasma in the L-2 stellator are reported. The edge plasma can be divided into three radial regions: a low density region between the wall and the separatrix (
n
e ≤ 1 × 10
9 cm
−3), a high gradient region near the separatrix and a region inside the separatrix zone with density ~
n
e ≤ 1 × 10
12 cm
−3. Edge turbulence is found to be sensitive to the mode of plasma heating. Edge plasma data from the stellarator is compared with that from the TV-1 tokamak. An energy balance in the near limiter zone of the stellarator is analysed from experimental measurements of the radial heat flux profiles and also from numerical simulations based on a theoretical model. It is shown that the experimentally measured limiter efficiency is well described theoretically. |
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ISSN: | 0022-3115 1873-4820 |
DOI: | 10.1016/0022-3115(89)90371-1 |