Reconstruction of current density distributions in the CDX‐U tokamak
Reconstruction of current density distributions in the CDX‐U tokamak
复制标题
CDX-U 托卡马克中电流密度分布的重建
DOI：
10.1063/1.1143628
复制
发表时间：
1992
影响因子：
1.6
通讯作者：
M. Ono
中科院分区：
文献类型：
--
作者：
Y. Hwang;C. Forest;D. Darrow;G. Greene;M. Ono
磁诊断用于重建CDX-U托卡马克中无感驱动等离子体的电流密度分布。边界磁场由32个拾波线圈和三个磁通环测量，这些线圈连接在CDX-U容器内的不同极向位置;此外，还使用内部磁探头。在厚铝容器上测量显著的涡流，并在分析中考虑。使用最小平方误差技术从这些测量中重建二维电流密度分布和磁通量轮廓。等离子体电流的有限元描述是有用的一般磁几何形状，从开放的磁力线闭合通量表面。通过增加元件的数量，获得收敛的电流密度分布。
Magnetic diagnostics are used to reconstruct current density profiles in noninductively driven plasmas in the CDX‐U tokamak. The boundary magnetic fields are measured by 32 pickup coils and three flux loops attached at different poloidal positions inside the CDX‐U vessel; in addition, internal magnetic probes are also used. Significant eddy currents are measured on the thick aluminum vessel and accounted for in the analysis. Two‐dimensional current density distributions and magnetic flux contours are reconstructed from these measurements using a least‐square‐error technique. A finite element description of plasma currents is useful for general magnetic geometries which evolve from open field lines to closed flux surfaces. By increasing the number of elements, a converged current density distribution is obtained.