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Author: Ronald E. Waltz
Publisher:
ISBN:
Category : Plasma turbulence
Languages : en
Pages : 210
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Book Description
Author: Ronald E. Waltz
Publisher:
ISBN:
Category : Plasma turbulence
Languages : en
Pages : 210
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Book Description
Author: Y. Hamada
Publisher:
ISBN:
Category :
Languages : en
Pages : 4
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Book Description
Author: Julie Payan
Publisher:
ISBN:
Category :
Languages : fr
Pages : 162
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Book Description
AFIN DE REALISER L'IGNITION SUR LES PLASMAS DE TOKAMAKS, IL FAUT LIMITER LES PERTES THERMIQUES, L'ESSENTIEL DE CES PERTES ETANT LIE A UN TRANSPORT ANORMAL DE LA CHALEUR, QUE L'ON ATTRIBUE A UNE MICROTURBULENCE. SUR LE TOKAMAK TORE SUPRA, DES MESURES DE TURBULENCE SONT OBTENUES A TRAVERS L'ANALYSE DES FLUCTUATIONS DE DENSITE, A L'AIDE DU DIAGNOSTIC DE DIFFUSION COHERENTE ALTAIR. LES SPECTRES FREQUENTIELS DE TURBULENCE PRESENTENT AINSI DEUX PICS ASYMETRIQUES CENTRES SUR LES FREQUENCES POSITIVES ET NEGATIVES. ALORS QUE LE PIC CENTRE SUR LES FREQUENCES POSITIVES PEUT ETRE EXPLIQUE PAR LA PRESENCE D'ONDES DE DERIVE, IL S'AGIT D'INTERPRETER LE PIC CNETRE SUR LES FREQUENCES NEGATIVES. APRES UNE ETUDE DES PROPRIETES DE LOCALISATION SPATIALE DU DIAGNOSTIC, AINSI QU'UNE ANALYSE APPROFONDIE DES SPECTRES DE TURBULENCE ET DES COEFFICIENTS DE TRANSPORT, LA PRESENCE DE CE PIC IONIQUE SEMBLE LIEE, POUR UNE PARTIE DU VOLUME DE DIFFUSION, A UN CHANGEMENT DE SIGNE DE LA VITESSE DE DERIVE ASSOCIEE AU CHAMP ELECTRIQUE RADIAL. L'INFLUENCE DU CHAMP ELECTRIQUE RADIAL SUR LES SPECTRES DE TURBULENCE NOUS AMENE A CHERCHER DES EXPERIENCES OU CE CHAMP EST MODIFIE, COMME C'EST LE CAS LORS DE L'APPLICATION DU DIVERTOR ERGODIQUE. UNE ETUDE DETAILLEE DE TRANSPORT ET DE TURBULENCE AVEC ET SANS DIVERTOR ERGODIQUE PERMET DE DISTINGUER TROIS ZONES DANS LE PLASMA: UNE REGION INTERNE, UNE REGION DE BORD, PUIS UNE REGION INTERMEDIAIRE. DANS CETTE REGION INTERMEDIAIRE APPARAIT UNE DIMINUTION INATTENDUE DU NIVEAU RELATIF DE FLUCTUATIONS DE DENSITE ET DES COEFFICIENTS DE TRANSPORT. A PARTIR DE L'ENSEMBLE DE CES RESULTATS IL APPARAIT QUE LE CHAMP ELECTRIQUE RADIAL JOUE PROBABLEMENT UN ROLE IMPORTANT SUR LA STABILITE DES ONDES
Author: Radu Balescu
Publisher: CRC Press
ISBN: 9781420034684
Category : Science
Languages : en
Pages : 498
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Book Description
Anomalous transport is a ubiquitous phenomenon in astrophysical, geophysical and laboratory plasmas; and is a key topic in controlled nuclear fusion research. Despite its fundamental importance and ongoing research interest, a full understanding of anomalous transport in plasmas is still incomplete, due to the complexity of the nonlinear phenomena involved. Aspects in Anomalous Transport in Plasmas is the first book to systematically consider anomalous plasma transport theory and provides a unification of the many theoretical models by emphasizing interrelations between seemingly different methodologies. It is not intended as a catalogue of the vast number of plasma instabilities leading to anomalous transport; instead it chooses a number of these and emphasizes the aspects specifically due to turbulence. After a brief introduction, the microscopic theory of turbulence is discussed, including quasilinear theory and various aspects of renormalization methods, which leads to an understanding of resonance broadening, mode coupling, trajectory correlation and clumps. The second half of the book is devoted to stochiastic tramsport, using methods based on the Langevin equations and on Random Walk theory. This treatment aims at going beyond the traditional limits of weak turbulence, by introducing the recently developed method of decorrelation trajectories, and its application to electrostatic turbulence, magnetic turbulence and zonal flow generation. The final chapter includes very recent work on the nonlocal transport phenomenon.
Author: Marshall N. Rosenbluth
Publisher: Springer Science & Business Media
ISBN: 9781563961311
Category : Science
Languages : en
Pages : 514
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Book Description
Market: Scientists and students involved in thermonuclear fusion research. Thermonuclear fusion research using the confinement device tokamak represents one of the most prominent science projects in the second half of the 20th century. International Tokamak Community is now committing significant effort and funds to experiments with burning plasma, hot and dense enough to produce significant nuclear fusion reactions. The methods used to enhance tokamak performance have a profound and immediate effect on machine design. This book provides an up-to-date account of research in tokamak fusion and puts forward innovative ideas in confinement physics.
Author: R.B. White
Publisher: Elsevier
ISBN: 1483293262
Category : Science
Languages : en
Pages : 374
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Book Description
This is a graduate textbook on tokamak physics, designed to provide a basic introduction to plasma equilibrium, particle orbits, transport, and those ideal and resistive magnetohydrodynamic instabilities which dominate the behavior of a tokamak discharge, and to develop the mathematical methods necessary for their theoretical analysis.
Author: Wendell Horton
Publisher: World Scientific
ISBN: 9814383546
Category : Science
Languages : en
Pages : 518
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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.
Author: Terry Lee Rhodes
Publisher:
ISBN:
Category : Plasma turbulence
Languages : en
Pages : 95
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Book Description
Author: C Wendell Horton, Jr
Publisher: #N/A
ISBN: 9813225904
Category : Science
Languages : en
Pages : 522
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Book Description
For a few seconds with large machines, scientists and engineers have now created the fusion power of the stars in the laboratory and at the same time find the rich range of complex turbulent electromagnetic waves that transport the plasma confinement systems. The turbulent transport mechanisms created in the laboratory are explained in detail in the second edition of 'Turbulent Transport in Magnetized Plasmas' by Professor Horton.The principles and properties of the major plasma confinement machines are explored with basic physics to the extent currently understood. For the observational laws that are not understood — the empirical confinement laws — offering challenges to the next generation of plasma students and researchers — are explained in detail. An example, is the confinement regime — called the 'I-mode' — currently a hot topic — is explored.Numerous important problems and puzzles for the next generation of plasma scientists are explained. There is growing demand for new simulation codes utilizing the massively parallel computers with MPI and GPU methods. When the 20 billion dollar ITER machine is tested in the 2020ies, new theories and faster/smarter computer simulations running in near real-time control systems will be used to control the burning hydrogen plasmas.
Author: Scott Joseph Levinson
Publisher:
ISBN:
Category : Space and time
Languages : en
Pages : 238
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Book Description
