Comparison between experimental pressure profiles and the momentum balance constraint in FTU
In the neoclassical theory the net radial plasma velocity v(r) is derived from the momentum balance equation. In steady state, the value of v(r) is related to the particle sources by means of the continuity equation. It is well known that the standard neoclassical theory is not in agreement with experiments, since electron thermal transport is found to be much greater than predicted, although the electrical conductivity apparently is not anomalous. For this reason an extended neoclassical theory has been proposed, which assumes that the effective electron-electron collision rate is strongly enhanced, while the electron-ion collision rate retains its coulombian value. This extended neoclassical theory has been shown to be in agreement with some experiments.
Bibliographic Reference: Paper presented: Workshop on Local Transport Studies in Fusion Plasmas, Varenna (IT), August 30 - September 3, 1993
Availability: Available from (1) as Paper EN 37903 ORA
Record Number: 199311435 / Last updated on: 1994-11-28
Original language: en
Available languages: en