The analysis method of the Motional Stark Effect (MSE) diagnostic to measure the rotational transform and current profiles in the Large Helical Device has been improved. This was done by using the Variational Moments Equilibrium Code to calculate an equilibrium database for various pressure profiles and current profiles. This method looks for the radial profile of the rotational transform in the equilibrium database that gives the best fit to the polarization angle profiles measured with the MSE diagnostic. This analysis improves the measurements of rotational transform, especially near the magnetic axis, where the sensitivity of the polarization angle measurements becomes low and the uncertainty due to error in the estimation of the Pfirsch–Schlüter current becomes large. The radial profiles of the rotational transform and current profiles for Electron Cyclotron Current Drive and Neutral Beam Current Drive are obtained in the new analysis method with a sufficiently high accuracy to discuss the discrepancy of the current density profiles between the measurements and the calculations.

中文翻译：

---

分析运动斯塔克效应 (MSE) 诊断以测量大型螺旋装置中的旋转变换和电流分布

改进了用于测量大型螺旋装置中的旋转变换和电流分布的运动斯塔克效应 (MSE) 诊断的分析方法。这是通过使用变分力矩平衡代码来计算各种压力曲线和电流曲线的平衡数据库来完成的。此方法在平衡数据库中寻找旋转变换的径向轮廓，该轮廓最适合使用 MSE 诊断测量的偏振角轮廓。这种分析改进了旋转变换的测量，特别是在磁轴附近，在那里极化角测量的灵敏度变低，并且由于 Pfirsch-Schlüter 电流估计中的误差而导致的不确定性变大。