Modelling of detachment in a limiter tokamak as a nonlinear phenomenon caused by impurity radiation
A numerical one-dimensional radial time-dependent model of particle and energy transport in tokamak plasmas has been developed that takes into account the interaction of background and impurity particles through the radiation losses of energy and ion detection. Detachment in ohmic discharges caused by an increase in the electron density is modelled, and the effect of particle and energy transport on detachment conditions is studied. Investigation of dynamic changes in plasma parameters during detachment provoked by an increase in impurity influx is performed. The effect of the nature of the heat source on the stabilisation of the radiating layer is elucidated. The influence of neo-classical transport and charge-exchange with hydrogen neutrals on the impurity behaviour in attached and detached plasmas is discussed.
Bibliographic Reference: Article: Plasma Physics Control Fusion, Vol. 36 (1994) No. 11, pp. 1819-1843
Record Number: 199510165 / Last updated on: 1995-02-07
Original language: en
Available languages: en