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Influence of expanding and contracting magnetic field configurations on detached plasma formation in a linear plasma device

机译：扩展和承包磁场构造对线性等离子体装置分离等离子体形成的影响

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摘要

We investigated the effects of magnetic field structure on detached plasma formation by simulating magnetically expanding and contracting plasma in a linear plasma device. The present study helps to characterize the geometries of a conventional poloidal divertor and advanced divertors, e.g., super-X divertor. The total ion particle flux measured with a large-diameter target plate dramatically changed under the detached plasma condition compared to that in attached plasma. Under the detached plasma condition, the magnetically expanding plasma clearly exhibited a significant influence on the degradation of detached plasma formation. Further, the magnetically contracting plasma slightly enhanced the electron-ion recombination (EIR) processes. By changing the magnetic field structure from contraction to expansion, the electron density (n(e)) decreased and the electron temperature (T-e) increased upstream from the recombination front, leading to the degradation of the EIR processes. The effect of the decrease in parallel flow velocity under the magnetically contracting plasma on the plasma detachment was not observed because the driven flow due to pressure gradient compensated the effect. Published by AIP Publishing.
机译：我们通过在线性等离子体装置中模拟磁力膨胀和收缩等离子体来研究磁场结构对分离等离子体形成的影响。本研究有助于表征传统的单色偏移器和先进偏移器的几何形状，例如超级X偏移器。与附着的等离子体中的相比，用大直径目标板测量的总离子颗粒通量在分离的等离子体条件下显着改变。在分离的血浆条件下，磁力膨胀血浆显然对分离的等离子体形成的降解显示出显着影响。此外，磁性收缩等离子体略微增强了电子离子重组（EIR）方法。通过将磁场结构从收缩到膨胀改变，电子密度（n（e））降低，并且电子温度（t-e）从重组前沿上游增加，导致EIR过程的降解。未观察到在磁性收缩等离子体下的平行流速下降的影响，因为由于压力梯度引起的驱动流量补偿了效果。通过AIP发布发布。

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  • 来源
    《Physics of plasmas》 |2017年第6期|共8页
  • 作者

    Hayashi Y.; Ohno N.; Kajita S.; Tanaka H.;

  • 作者单位

    Nagoya Univ Grad Sch Engn Nagoya Aichi 4648603 Japan;

    Nagoya Univ Grad Sch Engn Nagoya Aichi 4648603 Japan;

    Nagoya Univ Inst Mat &

    Syst Sustuinabil Nagoya Aichi 4648603 Japan;

    Nagoya Univ Grad Sch Engn Nagoya Aichi 4648603 Japan;

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  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类 等离子体物理学;
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