首页> 外文期刊>Plasma physics and controlled fusion >Turbulence trigger for neoclassical tearing modes in tokamaks
【24h】

Turbulence trigger for neoclassical tearing modes in tokamaks

机译:托卡马克中新古典撕裂模式的湍流触发

获取原文
获取原文并翻译 | 示例
           

摘要

A stochastic trigger by micro-turbulence for neoclassical tearing modes (NTMs) is studied. NTMs induce topological change of magnetic structure and have a subcritical nature. It is found that the NTM can be excited regardless of the presence of seed islands. The transition rate of the NTM, its probability density function and its statistically averaged amplitude are obtained. The boundary in the phase diagram is determined as the statistical long time average of the transition conditions. The NTM can be excited by crossing this boundary even in the absence of other global instabilities. The boundary is expressed in terms of the poloidal beta value. Its dependence on the ratio between the ion banana width and radius of the rational surface, rho(b)/r(s), is found to vary in the range rho(b)/r(s)-(rho(b)/r(s))(2), depending on the linear stability of the tearing mode.
机译:研究了微湍流对新古典撕裂模式(NTM)的随机触发。 NTM引起磁性结构的拓扑变化,并具有亚临界性质。发现不管种子岛的存在,NTM都可以被激发。获得了NTM的转换速率,其概率密度函数及其统计平均幅度。相图中的边界确定为过渡条件的统计长时间平均值。即使没有其他全局不稳定因素,也可以通过跨越此边界来激发NTM。边界以极数β值表示。发现其对离子香蕉宽度与有理表面半径之比rho(b)/ r(s)的依赖性在rho(b)/ r(s)-(rho(b)/ r(s))(2),取决于撕裂模式的线性稳定性。

著录项

相似文献

  • 外文文献
  • 中文文献
  • 专利
获取原文

客服邮箱:kefu@zhangqiaokeyan.com

京公网安备:11010802029741号 ICP备案号:京ICP备15016152号-6 六维联合信息科技 (北京) 有限公司©版权所有
  • 客服微信

  • 服务号