• 主题
高级搜索  >
历史搜索 清空历史
首页> 外文期刊>Plasma physics and controlled fusion >Ideal magnetohydrodynamic constraints on the pedestal temperature in tokamaks
【24h】

Ideal magnetohydrodynamic constraints on the pedestal temperature in tokamaks

机译：托卡马克基座温度的理想磁流体动力学约束

获取原文
获取原文并翻译 | 示例
           
页面导航
  • 摘要
  • 著录项
  • 相似文献
  • 相关主题

摘要

The ideal magnetohydrodynamic (MHD) stability limits for the edge transport barrier (ETB) region in tokamaks are explored, concentrating in particular on the intermediate to high toroidal mode number, n, modes. These calculations take full account of the effect of the edge bootstrap current on the stability of both ballooning and peeling modes. Because the current plays an important role in MHD stability, the temperature and density independently influence stability and, in particular, the pressure gradient that the ETB can support. The stability calculations therefore provide limits to the achievable temperature pedestal associated with the transport barrier which are not simply pressure pedestal limits, as is often assumed. One important result is that increasing triangularity is predicted to be beneficial in providing access to a higher temperature pedestal at fixed pedestal width, at least up to triangularity similar to0.5. Another significant result is that the finite n corrections, which are stabilizing for ballooning modes, are important for narrow pedestal widths and permit significantly higher temperature pedestals than one would obtain using the leading order (n = infinity) ballooning theory. Specific calculations for equilibria characteristic of ITER and FIRE suggest that temperature pedestals in the region of a few kiloelectronvolts should be achievable, but the precise value depends on the pedestal width, a prediction for which is beyond the scope of this paper. [References: 36]
机译：探索了托卡马克中的边缘传输势垒（ETB）区域的理想磁流体动力学（MHD）稳定性极限，尤其集中于中高环形模数n模式。这些计算充分考虑了边缘自举电流对膨胀和剥离模式的稳定性的影响。因为电流在MHD稳定性中起着重要作用，所以温度和密度独立地影响稳定性，尤其是ETB可以支持的压力梯度。因此，稳定性计算为与运输屏障相关的可达到的温度基座提供了限制，而不仅仅是通常假定的压力基座限制。一个重要的结果是，预计增加三​​角形性将有利于在固定基座宽度（至少可达类似于0.5的三角形性）下提供更高温度的基座。另一个重要的结果是，对于气球模式稳定的有限n个校正对于狭窄的基座宽度很重要，并且允许温度基座比使用领先阶（n =无穷大）气球理论所获得的温度基座高得多。对ITER和FIRE的平衡特性进行的具体计算表明，应该可以在几千电子伏特的范围内达到温度基座，但是精确值取决于基座宽度，对此的预测超出了本文的范围。 [参考：36]

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