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首页> 外文期刊>Nuclear fusion >Systematic linear-stability assessment of Alfven eigenmodes in the presence of fusion α-particles for ITER-like equilibria
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Systematic linear-stability assessment of Alfven eigenmodes in the presence of fusion α-particles for ITER-like equilibria

机译：存在类似ITER平衡的融合α粒子时Alfven本征模态的系统线性稳定性评估

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摘要

A systematic approach to evaluate the linear stability of Alfven eigenmodes in the presence of fusion-born a-particles is reported. The techniques developed are particularly useful when dealing with scenarios where no experimental guidance is available about which eigenmodes are more easily destabilized by the supra-thermal population. The advantages and limitations of the underlying model chosen to describe the wave-particle interaction are discussed, along with the parallelization of the designed workflow in order to take advantage of massively parallel computer systems. This workflow is tested using a ITER baseline scenario, showing that it is able to routinely single out the most linearly unstable eigenmodes for a given equilibrium configuration. The eigenmodes with highest growth rate were found to be core-localised Toroidal Alfven Eigenmodes with toroidal mode number n ≈ 30, placed near the maximum of the α-particle density gradient and within a low magnetic-shear region.
机译：报告了一种系统的方法来评估在融合出生的a粒子存在下Alfven本征模式的线性稳定性。开发的技术在处理没有实验指导的情况下特别有用，因为有关哪些本征模式更容易因超热人口而不稳定。为了利用大规模并行计算机系统，讨论了用来描述波粒相互作用的基本模型的优点和局限性，以及设计工作流程的并行化。该工作流程使用ITER基准情景进行了测试，表明对于给定的平衡配置，它能够常规地挑选出线性最不稳定的本征模式。发现具有最高增长率的本征模是位于环形的模态nf≈30的环形局部Alfven本征模，位于最大的α粒子密度梯度附近并且在低磁剪切区内。

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  • 来源
    《Nuclear fusion》 |2015年第8期|083003.1-083003.9|共9页
  • 作者

    P. Rodrigues; A. Figueiredo; J. Ferreira; R. Coelho; F. Nabais; D. Borba; N.F. Loureiro; H.J.C. Oliver; S.E. Sharapov;

  • 作者单位

    Instituto de Plasmas e Fusao Nuclear, Instituto Superior Tecnico, Universidade de Lisboa, 1049-001 Lisboa, Portugal;

    Instituto de Plasmas e Fusao Nuclear, Instituto Superior Tecnico, Universidade de Lisboa, 1049-001 Lisboa, Portugal;

    Instituto de Plasmas e Fusao Nuclear, Instituto Superior Tecnico, Universidade de Lisboa, 1049-001 Lisboa, Portugal;

    Instituto de Plasmas e Fusao Nuclear, Instituto Superior Tecnico, Universidade de Lisboa, 1049-001 Lisboa, Portugal;

    Instituto de Plasmas e Fusao Nuclear, Instituto Superior Tecnico, Universidade de Lisboa, 1049-001 Lisboa, Portugal;

    Instituto de Plasmas e Fusao Nuclear, Instituto Superior Tecnico, Universidade de Lisboa, 1049-001 Lisboa, Portugal;

    Instituto de Plasmas e Fusao Nuclear, Instituto Superior Tecnico, Universidade de Lisboa, 1049-001 Lisboa, Portugal;

    HH Wills Physics Laboratory, University of Bristol, City of Bristol BS8 1TH, UK;

    CCFE, Culham Science Centre, Abingdon OX14 3DB, UK;

  • 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

    Alfven eigenmodes; alpha-particles; wave-particle interaction; tokamaks;

    机译：Alfven本征模式α粒子;波粒相互作用托卡马克;

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