A new controller has been developed with help of the flexible divertor poloidal-field coil set of the DIII-D tokamak, to aid in the precise control of the flux expansion in the scrape-off layer. The single-input multiple-output architecture ensures flexibility through a complementary set of orthogonal actuator direction to guarantee minimum effect on existing controlled variables, e.g. radial and vertical position control of the X-point. A non-linear free-boundary simulation code (GSevolve) is used for simulating the closed-loop response and for verifying the implementation of the control algorithm on the DIII-D plasma control system. First results of the experimental commissioning of the new controller during 2020 DIII-D campaign are also presented.

借助DIII-D托卡马克的挠性偏向器极向场线圈组，开发了一种新的控制器，以帮助精确控制刮除层中的磁通膨胀。单输入多输出架构通过正交致动器方向的互补集来确保灵活性，以确保对现有控制变量（例如X点的径向和垂直位置控制）的影响最小。非线性自由边界仿真代码（GSevolve）用于仿真闭环响应并验证DIII-D等离子控制系统上控制算法的实现。还介绍了在2020年DIII-D战役期间新控制器的实验性调试的初步结果。