MODULATION OF THE TURBULENCE LEVEL AND OF THE ENERGY FLUX BY SAWTOOTH RELAXATIONS IN TOKAMAKS
Modulation of the turbulence level by sawtooth relaxations of the plasma core has been detected by Co-2 laser scattering in the TEXTOR Tokamak. This feature is reproduced quantitatively by a heat transport code in which the electron heat conduction coefficient is obtained on the basis of a theoretical model of the saturation of the dissipative trapped electron instability; a simple interpretation of this enhancement is given. The code predicts also a strong modulation of the heat flux on the limiter in agreement with observations in other devices. The calculated global plasma parameters, such as energy confinement time and loop voltage, fit well with the measured data.
Bibliographic Reference: 2ND INTERNATIONAL SYMPOSIUM ON LASER-AIDED PLASMA DIAGNOSTICS, CULHAM (UK), SEPT. 10-12, 1985 PP. 219-224, PROCEEDINGS PUBLISHED BY EDITIONS DE PHYSIQUE, ORSAY (FRANCE), 1985
Record Number: 1989125033000 / Last updated on: 1987-03-01
Available languages: en