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Simulation as a tool to improve wave heating in fusion plasmas

Part of: ITER International School 2014 Focus on Fusion

Published online by Cambridge University Press:  07 August 2015

S. Heuraux ,
F. da Silva ,
T. Ribeiro ,
B. Despres ,
M. Campos Pinto ,
J. Jacquot ,
E. Faudot ,
S. Wengerowsky ,
L. Colas  and
L. Lu
S. Heuraux*
Affiliation:
Institut Jean Lamour, UMR 7198, CNRS–Université de Lorraine, BP 70239, 54506 Vandoeuvre, France
F. da Silva
Affiliation:
Instituto de Plasmas e Fusão Nuclear, Instituto Superior Técnico, Universidade de Lisboa, 1049-001 Lisboa, Portugal
T. Ribeiro
Affiliation:
Max-Planck-Institut für Plasmaphysik, 85748 Garching, Germany
B. Despres
Affiliation:
Laboratory Jacques Louis Lions, University Pierre et Marie Curie, BP 187, 75252 Paris CEDEX 05, France
M. Campos Pinto
Affiliation:
Laboratory Jacques Louis Lions, University Pierre et Marie Curie, BP 187, 75252 Paris CEDEX 05, France
J. Jacquot
Affiliation:
CEA, IRFM, 13108 St Paul Lez Durance, France
E. Faudot
Affiliation:
Institut Jean Lamour, UMR 7198, CNRS–Université de Lorraine, BP 70239, 54506 Vandoeuvre, France
S. Wengerowsky
Affiliation:
Institut Jean Lamour, UMR 7198, CNRS–Université de Lorraine, BP 70239, 54506 Vandoeuvre, France
L. Colas
Affiliation:
CEA, IRFM, 13108 St Paul Lez Durance, France
L. Lu
Affiliation:
Institut Jean Lamour, UMR 7198, CNRS–Université de Lorraine, BP 70239, 54506 Vandoeuvre, France CEA, IRFM, 13108 St Paul Lez Durance, France
*
†Email address for correspondence: stephane.heuraux@univ-lorraine.fr
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Abstract

Firstly, a brief overview will be given on different models that are able to describe the behaviour of wave propagation as a function of specific frequency ranges. Each range corresponds to different heating systems, namely, 20–100 MHz for the ion cyclotron resonant heating, 2–20 GHz for lower-hybrid heating or current drive, and 100–250 GHz for electron cyclotron resonant heating or current drive systems. The specification of every system will be explained in detail, including the typical set of equations and the assumptions needed to describe the properties of these heating or current drive systems, as well as their specific domains of validity. In these descriptions, special attention will be paid to the boundary conditions. A review of specific physical problems associated with the wave heating systems will also be provided. The review will detail the role of simulation in answering questions that arise from experiments on magnetized plasma devices devoted to fusion. A few examples that will be covered are the impact of edge turbulence on wave propagation and its consequences on heating system performance, the effects of fast particles and ponderomotive effects, among others. A study that is more focused on radio-frequency sheath effects will also be discussed. It shows that such simulations require very sophisticated tools to gain a partial understanding of the observations undertaken in dedicated experiments. To conclude this review, an overview will be given about the requirements and progress necessary to obtain relevant predictive simulation tools able to describe the wave heating systems used in fusion devices.

Type
Research Article
Information
Journal of Plasma Physics , Volume 81 , Issue 5 , October 2015 , 435810503
Copyright
© Cambridge University Press 2015 

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