Study of plasma displacement and $\beta_{p}+l_{i}/2$ by the simplest Grad-Shafranov equation solution for circular cross section tokamak

Abstract

In this work we present the plasma displacement and $\beta _p + l_{i}/2$ by the Simplest Grad-Shafranov Equation (GSE) solution using Solov'ev assumption for circular cross section HT-7 tokamak. Using diamagnetic and compensation loop, combining with poloidal magnetic probe array signals, plasma displacement and $\beta _p + l_{i}/2$ are measured. In this paper, theoretical and experimental results in determining plasma displacement and $\beta_p + l_{i}/2$ are presented. We have seen that the calculated plasma displacement and the calculated $\beta _p + {l_i }/{2}$ depend on the kind of discharge or plasma current.