Pressure and conductivity profiles in ohmic TCV discharges
A large variety of plasma conditions has been created in Tokamak à Configuration Variable (TCV). They include elongations in the range 1 to 2.58, triangularities between -0.7 and 1 as well as 'square' shapes and plasma currents in the range 0.1-1 MA. Over the entire range of quasi-stationary ohmic conditions investigated a correlation was observed between electron pressure profiles and conductivity profiles. The profile consistency features are in apparent agreement with theoretical considerations based on minimum energy states of the plasma or on stationary entropy. Further analysis of the experimental evidence, together with a simple model of the current profile based on marginal stability to the internal kink mode in the core and neoclassical conductivity in the confinement zone, however shows that the observations can be accounted for by the effects of sawtooth activity.
Bibliographic Reference: Article: Plasma Physics and Controlled Fusion
Record Number: 199711714 / Last updated on: 1998-01-20
Original language: en
Available languages: en