New Developments in the Theory of Ion-temperature-gradient Driven Turbulence in Tokamaks PDF Download
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Author: Nathan Mattor
Publisher:
ISBN:
Category : Plasma turbulence
Languages : en
Pages : 256
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Book Description
Author: Nathan Mattor
Publisher:
ISBN:
Category : Plasma turbulence
Languages : en
Pages : 256
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Book Description
Author:
Publisher:
ISBN:
Category :
Languages : en
Pages : 89
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Book Description
Author: Naoaki Miyato
Publisher:
ISBN:
Category : Tokamaks
Languages : en
Pages : 18
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Book Description
Author:
Publisher:
ISBN:
Category : Aeronautics
Languages : en
Pages : 500
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Book Description
Author:
Publisher:
ISBN:
Category :
Languages : en
Pages : 10
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Book Description
Author:
Publisher:
ISBN:
Category :
Languages : en
Pages : 34
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Book Description
Author: F. Romanelli
Publisher:
ISBN:
Category : Ions
Languages : en
Pages : 22
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Book Description
Author: John Rice
Publisher: Springer Nature
ISBN: 3030922669
Category : Science
Languages : en
Pages : 158
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Book Description
This book provides a comprehensive look at the state of the art of externally driven and self-generated rotation as well as momentum transport in tokamak plasmas. In addition to recent developments, the book includes a review of rotation measurement techniques, measurements of directly and indirectly driven rotation, momentum sinks, self-generated flow, and momentum transport. These results are presented alongside summaries of prevailing theory and are compared to predictions, bringing together both experimental and theoretical perspectives for a broad look at the field. Both researchers and graduate students in the field of plasma physics will find this book to be a useful reference. Although there is an emphasis on tokamaks, a number of the concepts are also relevant to other configurations.
Author:
Publisher:
ISBN:
Category : Power resources
Languages : en
Pages : 332
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Book Description
Author:
Publisher:
ISBN:
Category :
Languages : en
Pages : 41
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Book Description
From various laboratory and numerical experiments, there is clear evidence that under certain conditions the presence of sheared flows in a tokamak plasma can significantly reduce the ion thermal transport. In the presence of plasma fluctuations driven by the ion temperature gradient, the flows of energy and momentum parallel and perpendicular to the magnetic field are coupled with each other. This coupling manifests itself as significant off-diagonal coupling coefficients that give rise to new terms for anomalous transport. The authors derive from the gyrokinetic equation a set of velocity moment equations that describe the interaction among plasma turbulent fluctuations, the temperature gradient, the toroidal velocity shear, and the poloidal flow in a tokamak plasma. Four coupled equations for the amplitudes of the state variables radially extended over the transport region by toroidicity induced coupling are derived. The equations show bifurcations from the low confinement mode without sheared flows to high confinement mode with substantially reduced transport due to strong shear flows. Also discussed is the reduced version with three state variables. In the presence of sheared flows, the radially extended coupled toroidal modes driven by the ion temperature gradient disintegrate into smaller, less elongated vortices. Such a transition to smaller spatial correlation lengths changes the transport from Bohm-like to gyrobohm-like. The properties of these equations are analyzed. The conditions for the improved confined regime are obtained as a function of the momentum-energy deposition rates and profiles. The appearance of a transport barrier is a consequence of the present theory.
