Real time equilibrium reconstruction for tokamak discharge control
Real time equilibrium reconstruction for tokamak discharge control
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DOI：
10.1088/0029-5515/38/7/308
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发表时间：
1998-07-01
期刊：
影响因子：
3.3
通讯作者：
Leuer, JA
中科院分区：
文献类型：
--
作者：
Ferron, JR;Walker, ML;Leuer, JA
本文介绍了一种对任意时变放电形状和电流分布进行真实的托卡马克平衡重建的实用方法。一个近似的解决方案的梯度-Shafranov平衡关系的发现，最适合的诊断测量。因此，极向通量和环形电流密度的空间分布的解决方案可在真实的时间内获得，其与等离子体力平衡一致，从而允许对诸如放电形状和安全系数分布的参数进行准确评估。以足以进行排放控制的速率产生平衡溶液。该算法已在DIII-D托卡马克数字等离子体控制系统上实现。首次将真实的时间平衡重构应用于放电形状控制。
A practical method for performing a tokamak equilibrium reconstruction in real time for arbitrary time varying discharge shapes and current profiles is described. An approximate solution to the Grad-Shafranov equilibrium relation is found which best fits the diagnostic measurements. Thus, a solution for the spatial distribution of poloidal flux and toroidal current density is available in real time that is consistent with plasma force balance, allowing accurate evaluation of parameters such as discharge shape and safety factor profile. The equilibrium solutions are produced at a rate sufficient for discharge control. This equilibrium reconstruction algorithm has been implemented on the digital plasma control system for the DIII-D tokamak. The first application of real time equilibrium reconstruction to discharge shape control is described.