skip to main content
OSTI.GOV title logo U.S. Department of Energy
Office of Scientific and Technical Information

Title: Transport of radial heat flux and second sound in fusion plasmas

Abstract

Simple flux-gradient relations that involve time delay and radial coupling are discussed. Such a formulation leads to a rather simple description of avalanches and may explain breaking of gyroBohm transport scaling. The generalization of the flux-gradient relation (i.e., constitutive relation), which involve both time delay and spatial coupling, is derived from drift-kinetic equation, leading to kinetic definitions of constitutive elements such as the flux of radial heat flux. This allows numerical simulations to compute these cubic quantities directly. The formulation introduced here can be viewed as an extension of turbulence spreading to include the effect of spreading of cross-phase as well as turbulence intensity, combined in such a way to give the flux. The link between turbulence spreading and entropy production is highlighted. An extension of this formulation to general quasi-linear theory for the distribution function in the phase space of radial position and parallel velocity is also discussed.

Authors:
; ; ; ;  [1];  [2]; ;  [3];  [2]
  1. Laboratoire de Physique des Plasmas, Ecole Polytechnique, CNRS, 91128 Palaiseau Cedex (France)
  2. WCI Center for Fusion Theory, NFRI, Daejeon (Korea, Republic of)
  3. CEA, IRFM, F-13108 Saint Paul Lez Durance (France)
Publication Date:
OSTI Identifier:
22113439
Resource Type:
Journal Article
Journal Name:
Physics of Plasmas
Additional Journal Information:
Journal Volume: 20; Journal Issue: 2; Other Information: (c) 2013 American Institute of Physics; Country of input: International Atomic Energy Agency (IAEA); Journal ID: ISSN 1070-664X
Country of Publication:
United States
Language:
English
Subject:
70 PLASMA PHYSICS AND FUSION TECHNOLOGY; 71 CLASSICAL AND QUANTUM MECHANICS, GENERAL PHYSICS; COMPUTERIZED SIMULATION; DISTRIBUTION FUNCTIONS; ENTROPY; HEAT FLUX; PHASE SPACE; PLASMA; PLASMA HEATING; PLASMA SIMULATION; SECOND SOUND; TURBULENCE

Citation Formats

Guercan, Oe. D., Berionni, V., Hennequin, P., Morel, P., Vermare, L., Diamond, P. H., CMTFO and CASS, UCSD, California 92093, Garbet, X., Dif-Pradalier, G., and Kosuga, Y. Transport of radial heat flux and second sound in fusion plasmas. United States: N. p., 2013. Web. doi:10.1063/1.4792161.
Guercan, Oe. D., Berionni, V., Hennequin, P., Morel, P., Vermare, L., Diamond, P. H., CMTFO and CASS, UCSD, California 92093, Garbet, X., Dif-Pradalier, G., & Kosuga, Y. Transport of radial heat flux and second sound in fusion plasmas. United States. https://doi.org/10.1063/1.4792161
Guercan, Oe. D., Berionni, V., Hennequin, P., Morel, P., Vermare, L., Diamond, P. H., CMTFO and CASS, UCSD, California 92093, Garbet, X., Dif-Pradalier, G., and Kosuga, Y. 2013. "Transport of radial heat flux and second sound in fusion plasmas". United States. https://doi.org/10.1063/1.4792161.
@article{osti_22113439,
title = {Transport of radial heat flux and second sound in fusion plasmas},
author = {Guercan, Oe. D. and Berionni, V. and Hennequin, P. and Morel, P. and Vermare, L. and Diamond, P. H. and CMTFO and CASS, UCSD, California 92093 and Garbet, X. and Dif-Pradalier, G. and Kosuga, Y.},
abstractNote = {Simple flux-gradient relations that involve time delay and radial coupling are discussed. Such a formulation leads to a rather simple description of avalanches and may explain breaking of gyroBohm transport scaling. The generalization of the flux-gradient relation (i.e., constitutive relation), which involve both time delay and spatial coupling, is derived from drift-kinetic equation, leading to kinetic definitions of constitutive elements such as the flux of radial heat flux. This allows numerical simulations to compute these cubic quantities directly. The formulation introduced here can be viewed as an extension of turbulence spreading to include the effect of spreading of cross-phase as well as turbulence intensity, combined in such a way to give the flux. The link between turbulence spreading and entropy production is highlighted. An extension of this formulation to general quasi-linear theory for the distribution function in the phase space of radial position and parallel velocity is also discussed.},
doi = {10.1063/1.4792161},
url = {https://www.osti.gov/biblio/22113439}, journal = {Physics of Plasmas},
issn = {1070-664X},
number = 2,
volume = 20,
place = {United States},
year = {Fri Feb 15 00:00:00 EST 2013},
month = {Fri Feb 15 00:00:00 EST 2013}
}