Roche T, Thompson M C, Griswold M, Knapp K, Koop B, Ottaviano A, Tobin M, Magee R, Matsumoto T
TAE Technologies, Inc., 19631 Pauling, Foothill Ranch, California 92610, USA.
Rev Sci Instrum. 2018 Oct;89(10):10J107. doi: 10.1063/1.5037079.
A fundamental component of any magnetically confined fusion experiment is a firm understanding of the magnetic field. The increased complexity of the C-2W machine warrants an equally enhanced diagnostic capability. C-2W is outfitted with over 700 magnetic field probes of various types. They are both internal and external to the vacuum vessel. Inside, a linear array of innovative in-vacuum annular flux loop/B-dot combination probes provide information about plasma shape, size, pressure, energy, temperature, and trapped flux when coupled with established theoretical interpretations. A linear array of B-dot probes complement the azimuthally averaged measurements. A Mirnov array of 64 3D probes, with both low and high frequency resolution, detail plasma motion and MHD modal content via singular value decomposition analysis. Internal Rogowski probes measure axial currents flowing in the plasma jet. Outside, every feed-through for an internal probe has an external axial field probe. There are many external loops that measure the plasma formation dynamics and the total external magnetic flux. The external measurements are primarily used to characterize eddy currents in the vessel during a plasma shot. Details of these probes and the data derived from their signals are described.
任何磁约束聚变实验的一个基本组成部分是对磁场有透彻的理解。C - 2W装置日益增加的复杂性需要同样增强的诊断能力。C - 2W配备了700多个各种类型的磁场探测器，它们分布在真空容器的内部和外部。在内部，一排创新的真空环形通量环/B点组合探测器能提供有关等离子体形状、大小、压力、能量、温度和俘获通量的信息，前提是结合已有的理论解释。一排B点探测器补充了方位角平均测量。一个由64个三维探测器组成的米尔诺夫阵列，具备低频和高频分辨率，通过奇异值分解分析详细呈现等离子体运动和磁流体动力学模态内容。内部罗果夫斯基探测器测量在等离子体喷流中流动的轴向电流。在外部，每个内部探测器的馈通都有一个外部轴向磁场探测器。有许多外部线圈用于测量等离子体形成动力学和总的外部磁通量。外部测量主要用于表征等离子体放电期间容器中的涡流。文中描述了这些探测器的细节以及从它们的信号中得出的数据。
