Development of Transport Model in Reactor Plasmas based on LHD Experiment Scaling

Abstract

We propose a transport model based on a systematic analysis of local transport for a large number of Large Helical Device discharges. This model allows us to more accurately predict the plasma performance compared with early researches in the helical plasmas. The proposed model has been applied to the integrated modeling code, TASK3D. We have developed a code to predict the confinement performance in the reactor-relevant highbeta regime. In the predictions of high-beta discharges maintained by NBIs, when field strength increases from 0.43 T to 0.9 T, the achievable beta value decreases by about 1%, but the magnetic Reynolds number increases about 10 times larger. In the prediction to add the perpendicularly NBs with the “re-entering fast ion” effect, the achievable beta value increase by about 0.3%. On the other hand, the magnetic Reynolds number barely changes.