Analytic formulae for centrifugal effects on turbulent transport of trace impurities in tokamak plasmas

作者：Angioni C^*; Casson F J; Veth C; Peeters A G

来源：Physics of Plasmas, 2012, 19(12): 122311.

DOI：10.1063/1.4773051

A local gyrokinetic description of the centrifugal effects on impurity transport in tokamak plasmas is presented, which extends previous models with the inclusion of the gradient of the background toroidal angular velocity in the equilibrium distribution. The equations are implemented in a gyrokinetic code. An analytical model is derived and formulae are proposed which allow the calculation of centrifugal effects on impurity transport in the limit where centrifugal effects are large only for heavy impurities in trace concentration, but are negligible for the bulk plasma. The analytic formulae are shown to be in quantitative agreement with the numerical results and are proposed for complementing present transport models.

• 出版日期2012-12