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Flexibility of LHD configuration with multilayer helical coils

机译：具有多层螺旋线圈的LHD配置的灵活性

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摘要

The Large Helical Device (LHD) is a heliotron device with two helical coils, each of which has a structure of three current layers. It is designed so that the current in each layer can be controlled independently by changing the combination of the coil current in the layers, it is possible to vary the effective minor radius of the helical coils, which enlarges the flexibility of the configuration. The properties of the plasmas for several combinations of the layers are investigated numerically. In the vacuum configuration, it is found that the combination of layers corresponding to a large effective coil radius has a large outermost surface. In this case, the rotational transform decreases and the magnetic hill is reduced compared with the configuration with all three layers. The large Shafranov shift, which is due to the small rotational transform, enhances the magnetic well and the magnetic shear to stabilize the Mercier mode; however, it degrades the equilibrium beta limit. In the case of the combination of layers for a small effective coil radius, the Mercier mode is destabilized, because the magnetic hill is enhanced. The effect on the bootstrap current is also studied.
机译：大型螺旋装置（LHD）是具有两个螺旋线圈的日光加速器装置，每个螺旋线圈具有三层电流层的结构。通过这样设计，可以通过改变各层中线圈电流的组合来独立地控制各层中的电流，可以改变螺旋线圈的有效有效半径，从而扩大了配置的灵活性。对层的几种组合的等离子体的性质进行了数值研究。在真空配置中，发现对应于大有效线圈半径的层的组合具有大的最外表面。在这种情况下，与所有三层结构相比，旋转变换减小并且磁峰减小。较大的Shafranov位移是由于较小的旋转变换而产生的，它增强了磁阱和磁切变，从而稳定了Mercier模式。但是，它会降低平衡beta极限。在有效线圈半径小的层组合的情况下，Mercier模式不稳定，因为增强了磁山。还研究了对自举电流的影响。

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  • 来源
    《Nuclear fusion》 |1996年第9期|p. 1145-1155|共11页
  • 作者

    K. Ichiguchi; O. Motojima; K. Yamazaki; N. Nakajima; M. Okamoto;

  • 作者单位

    National Institute of Fusion Science, Nagoya, Japan;

    National Institute of Fusion Science, Nagoya, Japan;

    National Institute of Fusion Science, Nagoya, Japan;

    National Institute of Fusion Science, Nagoya, Japan;

    National Institute of Fusion Science, Nagoya, Japan;

  • 收录信息 美国《科学引文索引》(SCI);美国《工程索引》(EI);美国《生物学医学文摘》(MEDLINE);
  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类 原子核物理学、高能物理学;
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