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Fast-ion D alpha diagnostic with 3D-supporting FIDASIM in the Large Helical Device

机译：快速离子D Alpha诊断与大型螺旋设备中的3D支撑FIDASIM

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摘要

For understanding the physics of energetic particles, the deuterium experimental campaigns started in Large Helical Device (LHD) from March 2017. To investigate the behavior of energetic particles, a Fast-ion D Alpha (FIDA) diagnostic was installed on the LHD. In the FIDA diagnostic, the Doppler-shifted D alpha light from fast-neutrals are utilized as signals of energetic particles, where these fast-neutrals are produced by the charge exchange process between fast-ions in the plasma and actively injected neutrals by neutral beam (NB). The advantages of the FIDA diagnostic are the velocity and the spatially resolved measurement of fast-ions at the crossing point between its line of sight (LOS) and the incident line of NB. The most recent FIDASIM is enhanced to simulate signals produced in three-dimensional magnetic configurations. The new version of FIDASIM uses the fast-ion distribution function produced by GNET as input to simulate FIDA signals at LHD. In order to validate the new version of the code, measurements of radial profiles of fast-ions using the FIDA diagnostic are performed in magnetohydrodynamic (MHD)-quiescent plasmas. The measured spectra are in good agreement with the theoretical prediction by 3D-supporting FIDASIM at the center of the plasma (R - 3.5 m~3.7 m, r_(eff)/a_(99) = -0.28-0.05) on the LHD when the line averaged electron density is n_(e_avg) ＜ 1.23 × 10~(19) m~(-3). On the other hand, the measured spectra are in disagreement with the theoretical prediction by 3D-supporting FIDASIM at even the center of the plasma when the line averaged electron density is n_(e_avg) ＞ 1.23 × 10~(19)m~(-3).
机译：为了了解能量粒子的物理学，氘实验活动从2017年3月开始于大型螺旋设备（LHD）。为了调查能量粒子的行为，在LHD上安装了快速离子Dα（FIDA）诊断。在FIDA诊断中，来自快节拍器的多普勒偏移的Dα光用作能量颗粒的信号，其中这些快上通过等离子体中的快速离子之间的电荷交换过程产生，并通过中性光束主动注入中性的中性（NB）。 FIDA诊断的优点是其视线（LOS）和NB的入射线之间的交叉点处的快速和空间分辨测量的速度和空间分辨测量。最新的FIDASIM得到增强以模拟三维磁性配置产生的信号。新版本的FIDASIM使用GNet生产的快速离子分布函数作为输入以模拟LHD的FIDA信号。为了验证代码的新版本，使用FIDA诊断的快速离子的径向谱的测量在磁流动动力学（MHD） - quiescent等离子体中进行。测量光谱与在LHD的等离子体中心（R - 3.5M〜3.7M，R_（EFF）/ A_（99）= -0.28-0.05）上的3D支撑FIDASIM的理论预测吻合该线平均电子密度为N_（E_AVG）<1.23×10〜（19）m〜（-3）。另一方面，当线平均电子密度为N_（E_AVG）> 1.23×10〜（19）M〜（ - ）时，测量的光谱在即使是等离子体的中心的3D支撑的FIDASIM在等离子体的中心处于分歧。 3）。

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  • 来源
    《Nuclear fusion》 |2020年第11期|112014.1-112014.13|共13页
  • 作者

    Y. Fujiwara; S. Kamio; H. Yamaguchi; A. V. Garcia; L. Stagner; H. Nuga; R. Seki; K. Ogawa; M. Isobe; M. Yokoyama; W. W. Heidbrink; M. Osakabe;

  • 作者单位

    National Institute for Fusion Science National Institutes of Natural Sciences 322-6 Oroshi-cho Toki 509-5292 Japan;

    National Institute for Fusion Science National Institutes of Natural Sciences 322-6 Oroshi-cho Toki 509-5292 Japan;

    National Institute for Fusion Science National Institutes of Natural Sciences 322-6 Oroshi-cho Toki 509-5292 Japan;

    University of California Irvine Irvine CA 92697 United States of America;

    Oak Ridge Institute for Science and Education Oak Ridge TN 37830 United States of America;

    National Institute for Fusion Science National Institutes of Natural Sciences 322-6 Oroshi-cho Toki 509-5292 Japan;

    National Institute for Fusion Science National Institutes of Natural Sciences 322-6 Oroshi-cho Toki 509-5292 Japan The Graduate University for Advanced Studies (SOKENDAI) 322-6 Oroshi-cho Toki 509-5292 Japan;

    National Institute for Fusion Science National Institutes of Natural Sciences 322-6 Oroshi-cho Toki 509-5292 Japan The Graduate University for Advanced Studies (SOKENDAI) 322-6 Oroshi-cho Toki 509-5292 Japan;

    National Institute for Fusion Science National Institutes of Natural Sciences 322-6 Oroshi-cho Toki 509-5292 Japan The Graduate University for Advanced Studies (SOKENDAI) 322-6 Oroshi-cho Toki 509-5292 Japan;

    National Institute for Fusion Science National Institutes of Natural Sciences 322-6 Oroshi-cho Toki 509-5292 Japan The Graduate University for Advanced Studies (SOKENDAI) 322-6 Oroshi-cho Toki 509-5292 Japan;

    University of California Irvine Irvine CA 92697 United States of America;

    National Institute for Fusion Science National Institutes of Natural Sciences 322-6 Oroshi-cho Toki 509-5292 Japan The Graduate University for Advanced Studies (SOKENDAI) 322-6 Oroshi-cho Toki 509-5292 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
  • 关键词

    LHD; energetic particle; fast-ion; FIDA; FIDASIM; GNET;

    机译：LHD;精力粒子;快离子;皮亚;Fiddim;GNet.;

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