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On the effect of collision frequencies enhancement on the neoclassical Ohm's law for tokamaks

A Nocentini1993年Plasma Physics and Controlled FusionIF 2.2出版社

The current density flowing on the closed magnetic surfaces of a tokamak plasma is determined as a function of the externally induced, toroidal electric field and the cross-magnetic-surface density and temperature gradients. It is expressed in terms of a 'pseudo-neoclassical' theory, i.e. a neoclassical theory generalized to include the possibility of anomalous enhancement (uniform in velocity space) of collisions. It is valid in all tokamak regimes ('banana', 'plateau', 'Pfirsch-Schluter' and any combination thereof), for any shape of the (closed) magnetic surfaces and for any plasma composition. The particular case of a clean plasma in which the effect of impurities is taken into account by introducing an effective ion charge for e-i collisions is considered in detail. The influence of an anomalous enhancement of e-e collisions on tokamak reactor scenarios is discussed.

日本語訳

トカマクプラズマの閉じた磁気面上を流れる電流密度は、外部から誘起されたトロイダル電場と、磁気面を横切る密度勾配および温度勾配の関数として決定される。これは「擬似新古典理論」、すなわち衝突の異常増強(速度空間で一様)を考慮するように一般化された新古典理論を用いて表現される。この理論は、すべてのトカマク領域(「バナナ」、「プラトー」、「プフィルシュ・シュリュター」、およびそれらの任意の組み合わせ)において、閉じた磁気面の任意の形状および任意のプラズマ組成に対して有効である。不純物の効果が電子-イオン衝突に対する有効イオン電荷の導入によって考慮される清浄プラズマの特別な場合が詳細に検討される。電子-電子衝突の異常増強がトカマク炉シナリオに及ぼす影響について議論される。

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