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Low-Temperature Plasma Near a Tokamak Reactor Limiter

Bastiaan J. Braams, Clifford E. Singer

Fusion Science and Technology

Volume 9 / Number 2 / March 1986 / Pages 320-327


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Analytic and two-dimensional computational solutions for the plasma parameters near a toroidally symmetric limiter are illustrated for the projected parameters of a Tokamak Fusion Core Experiment (TFCX). The temperature near the limiter plate is below 20 eV, except when the density 10 cm inside the limiter contact is 8 × 1013 cm−3 or less and the thermal diffusivity in the edge region is 2 × 104 cm2/s or less. Extrapolation of recent experimental data suggests that neither of these conditions is likely to be met near ignition in TFCX, so a low plasma temperature near the limiter should be considered a likely possibility.

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