Magnetic Field Structure near the Plasma Boundary in Helical Systems and Divertor Tokamaks
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概要
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The magnetic field structure of the scrape-off layer (SOL) region in both helical systems and divertor tokamaks is studied numerically by using model fields. The connection length of the field line to the wall, L, is calculated. In helical systems, L has logarithmic properties in the SOL region. The effect of axisymmetric fields on the field structure is defermined. In divertor tokamaks, L also has logarithmic properties near the separatrix. Even when the perturbations which resonate to rational surfaces near the plasma boundary are added, the logarithmic properties are not changed. The connection length of torsatron/helical-heliotron systems is compared with that of divertor tokamaks.
- 1990-07-20
著者
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Nagasaki Kazunobu
Plasma Physics Laboratory Kyoto University
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Itoh Kimitaka
National Inst. For Fusion Sci. Gifu
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