Author: Tobias HeinPublisher:
ISBN:
Category :
Languages : en
Pages : 150
Book Description
Finite Beta Effects on Turbulent Transport in Tokamak Plasmas
Author: Tobias HeinModelling of Turbulent Particle Transport in Finite-beta and Multiple Ion Species Plasma in Tokamaks
Author: Gabor SzepesiModelling of Turbulent Particle Transport in Finite-beta and Multiple Ion Species Plasma in Tokamaks
Author: Gábor SzepesiLecture Series on Turbulent Transport in Tokamaks
Author: Ronald E. WaltzPublisher:
ISBN:
Category : Plasma turbulence
Languages : en
Pages : 210
Book Description
Understand and Predict the Power Threshold Leading to Reduced Turbulent Transport at the Edge of Tokamak Plasma
Author: Gregory De DominiciPublisher:
ISBN:
Category :
Languages : en
Pages : 0
Book Description
A model based on a model which natively contained turbulence and turbulence driven flow. It has been improved to include the diamagnetic effects, the magnetic fluctuations, and in this work, we study the parametric dependencies of the observed L-H transition power threshold with respect to the ion mass. By including the diamagnetic effects in our model, we allow the competition between the drift waves and the interchange instabilities. This competition is here studied using fixed gradient simulation. We show in this work that the diamagnetic effects are stabilizing for a resistivity close to experimental conditions. Electromagnetic effects lead to more unstable modes at realistic resistivities. Moreover, a quasilinear estimation of the turbulent flux is able to qualitatively grasp the competition between the drift waves and the interchange and the behaviour of the nonlinear electrostatic turbulent flux with resistivity and plasma beta. Another parametric dependency of the turbulence is studied, by changing the mass of the isotope. This is known as the isotope effect. We show here that the turbulence is reduced when the ion mass is increased. Finally, the characteristic times of the turbulence are studied.Magnetic fluctuations have a dramatic effect on correlation times of the turbulence, by drastically reducing them. Accounting for these results, we present in this work the auto-generation of a transport barrier with electromagnetic simulations of edge turbulence, when the heat power is higher than a threshold, using flux-driven simulations. We have then changed the isotope, and correspondingly to experiments, the power threshold is lower for higher isotope mass.
Fusion Energy Update
Author: Scientific and Technical Aerospace Reports
Author: Effect of finite Beta on drift wave turbulence and particle confinement
Author: Akira HasegawaPublisher:
ISBN:
Category : Magnetic fields
Languages : en
Pages : 12
Book Description
Turbulent Transport in Magnetized Plasmas
Author: Wendell HortonPublisher: World Scientific
ISBN: 9814383546
Category : Science
Languages : en
Pages : 518
Book Description
The book explains how magnetized plasmas self-organize in states of electromagnetic turbulence that transports particles and energy out of the core plasma faster than anticipated by the fusion scientists designing magnetic confinement systems in the 20th century. It describes theory, experiments and simulations in a unified and up-to-date presentation of the issues of achieving nuclear fusion power.
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Author: Jan Weiland