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Total radiation measurements in the ETA-BETA II experiment

S. Costa, R. De Angelis, S. Ortolani, M.E. Puiatti1982年被引用 17Nuclear FusionIF 3出版社

The dependence of the measured radiation losses in ETA-BETA II on plasma density and plasma current rise time is discussed. A high-density limit is found, corresponding to large radiation. Above this limit, burning through the light impurities (mainly oxygen) does not take place and a cold, radiation-dominated discharge is obtained. This high-density limit scales with the plasma current, indicating a lower limit on the I/N parameter similar to the tokamak high-density limit. With longer current rise times the radiation energy loss during the set-up phase increases about linearly with rise time, corresponding always to about 50% of the total energy losses during this phase.

日本語訳

ETA-BETA IIにおける測定された放射損失のプラズマ密度およびプラズマ電流立ち上がり時間への依存性について議論する。高密度限界が見いだされ、これは大きな放射に対応する。この限界を超えると、軽不純物(主に酸素)の燃え抜けは起こらず、冷たく放射支配の放電が得られる。この高密度限界はプラズマ電流とともにスケールし、トカマクの高密度限界と同様のI/Nパラメータの下限を示唆する。電流立ち上がり時間が長いほど、セットアップ相における放射エネルギー損失は立ち上がり時間とほぼ線形に増加し、常にこの相における全エネルギー損失の約50%に相当する。

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