Plasma and Fusion Research
Online ISSN : 1880-6821
ISSN-L : 1880-6821
Letters
A Reduced Transport Model for Ion Heat Diffusivity by Gyro-Kinetic Analysis with Kinetic Electrons in Helical Plasmas
Shinichiro TODAMotoki NAKATAMasanori NUNAMIAkihiro ISHIZAWATomo-Hiko WATANABEHideo SUGAMA
Author information
JOURNALS FREE ACCESS

2017 Volume 12 Pages 1303035

Details
Abstract

A high ion temperature plasma in the Large Helical Device is examined in the case in which the ion temperature gradient mode is unstable. The nonlinear gyro-kinetic simulation is performed to evaluate the turbulent ion heat diffusivity with the kinetic electron response. It is clarified that the decay time of zonal flows [S. Ferrando-Margalet et al., Phys. Plasmas 14, 122505 (2007)] decreases radially outward due to the trapped electron and the ion energy transport increases outward. To reduce the computational cost for applying to the dynamical transport simulation, an extended transport model for the ion heat diffusivity in terms of the mixing length estimate and the characteristic quantity for the linear response of zonal flows is proposed.

Information related to the author
© 2017 by The Japan Society of Plasma Science and Nuclear Fusion Research
Previous article Next article
feedback
Top