-
Author(s):
K.Itoh and S.-I.Itoh
-
Title:
On Relation between Local Transport Coefficient and Global Confinement Scaling Law
Date of publication:
Jan. 1991
-
Key words:
Tokamaks, Scaling law, Energy confinement time, Local Thermal Conductivity, Density profile
-
Abstract:
The relation between the local thermal transport coefficient and the scaling law of the global energy confinement time is discussed. It is found that the parameter dependence of the scaling law is modified strongly by the density profile and is often dictated by the transport coefficient near the plasma boundary. When the plasma has the steep gradient near edge, the effect is enhanced. The representation of the empirical scaling law by the averaged quantities of the plasma (such as the beta value, effective collision frequency etc.) could be misleading in this respect.
-
|
