Impurity transport in tokamaks in the plateau to Pfirsch-Schlüter regimes

Ming-Sheng Chu, John M. Rawls, Seung Kai Wong, F. L. Hinton

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4 引文 斯高帕斯(Scopus)


Neoclassical transport coefficients for ion and impurity species are computed in a large aspect ratio toroidal magnetic confinement system for intermediate-to-high collision frequencies. A large range of values of the relevant density and charge parameters is explored and terms of order (m i/ml)1/2 are retained. The behavior of the transport coefficients is found to depend on the collisionality of both the ions and the impurities. A simple approximate analytic representation of these results which incorporates the correct asymptotic plateau and Pfirsch-Schlüter behavior is presented. In the plateau regime, when (n l/ni)(ml/mi)1/2≪1, the inward impurity flux is found to be suppressed for experimentally obtainable plasma parameters, implying that the time scale for impurity concentration could be too long to be observable.

頁(從 - 到)127-135
期刊Physics of Fluids
出版狀態Published - 1977 一月 1

All Science Journal Classification (ASJC) codes

  • 凝聚態物理學


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