Reversal of particle flux in collisional-finite beta tokamak discharges
Artikel i vetenskaplig tidskrift, 2015

The mixed gradient method [Zhong et al. Phys. Rev. Lett. 111, 265001 (2013)] is adopted and effects of collisions and finite beta are included in the Weiland 9-equation fluid model. The particle flux and particle pinch, obtained using the Weiland anomalous transport fluid model, are compared with Tore Supra experimental results. Particle transport is also studied using predictive simulation data for an experimental advanced superconducting tokamak discharge in which neutral beam heating is utilized. The effects of collisions on particle transport are studied by turning collisions on and off in the Weiland model. It is found that the particle pinch region is related to the mode structure. The particle pinch region coincides with the region where the strong ballooning modes are present due to large gradients. The general properties of the fluid model are examined by finding regions where collisions can enhance the particle pinch.

partikelpinch

Transport i fusionsplasma

Författare

J. Ma

Institute of Plasma Physics Chinese Academy of Sciences

Guanqiong Wang

Institute of Plasma Physics Chinese Academy of Sciences

Jan Weiland

Chalmers, Teknisk fysik, Nukleär teknik

T. Rafiq

Lehigh University

A. H. Kritz

Lehigh University

Physics of Plasmas

1070-664X (ISSN) 1089-7674 (eISSN)

Vol. 22 Art. no. 012304- 012304

Drivkrafter

Hållbar utveckling

Styrkeområden

Energi

Fundament

Grundläggande vetenskaper

Ämneskategorier

Fusion, plasma och rymdfysik

DOI

10.1063/1.4905628