Electric field and thermal diffusivity profiles of a compact helical system heliotron/torsatron plasma in a plateau regime

K Ida,H Iguchi,H Yamada,S Hidekuma,H Sanuki,K Yamazaki

doi:10.1063/1.860487

Abstract

The radial electric field profiles are derived from poloidal rotation velocity for a plateau regime plasma heated by a neutral beam in a CHS device. The measured electric field is more negative than the neoclassical prediction especially near the plasma periphery. However, the negative radial electric field is not directly related to the reduction of thermal diffusivity.

Highlights

Electric field and thermal diffusivity profiles of a compact helical system heliotron/torsatron plasma in a plateau regime journal or publication title volume number page range year
The radial electric field profiles are derived from poloidal rotation velocity for a plateau regime plasma heated by a neutral beam in a CHS device
The measured electric field is more negative than the neoclassical prediction especially near the plasma periphery

Summary

BRlEF COMMUNlCATIONS

The purpose of this Brief Communications section is ta present important research results of more limited scope than regular articles appearing in Physics of Fluids B. The radial electric field profiles are derived from poloidal rotation velocity for a plateau regime plasma heated by a neutral beam in a CHS device. The measured electric field is more negative than the neoclassical prediction especially near the plasma periphery. The negative radial electric field is not directly related to the reduction of thermal diffusivity. We reported the measurements of a radial electric field derived from a poloidal rotation velocity.

Shafranov shifts estimated by using the equilibrium code

The measured radial electric field is still more negative