...
  • 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 >Divertor plasma flow near the lower x-point in ASDEX Upgrade
【24h】

Divertor plasma flow near the lower x-point in ASDEX Upgrade

机译：ASDEX升级中较低X点附近的分流器血浆流量

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

A reciprocating probe in the lower divertor of ASDEX Upgrade, capable of accessing the low-field (LFS) and high-field side (HFS) scrape-off layers (SOLs) as well as the private flux region, was equipped with a Mach probe and used to measure flows in the vicinity of the lower x-point. We report on our measurements from ohmic and low-power H-mode discharges with ion B × ▽B drift towards the bottom x-point, and discuss their relevance to the current SOL/divertor flow understanding. In ohmic discharges, we present the evolution of divertor SOL and private flux flow profiles for increasing central . We show that the private flux flow is mainly directed from the HFS to the LFS at low densities. At medium-high densities the flow profile becomes more symmetric, and at very high densities the flow direction reverses on the LFS separatrix, having a LFS to HFS direction inside the private flux. We discuss the possible mechanisms that could affect divertor flows and produce such behaviour and conclude that pressure asymmetry between the two divertor legs combined with an E × B drift towards the inner divertor is a likely driving mechanism. At the HFS SOL, very large Mach numbers (typically exceeding M = 1) were observed in most cases. In low-power H-mode discharges inter-ELM flows were observed to be very similar to ohmic ones.
机译：ASDEX升级版下偏滤器中的往复式测头配备了一个Mach测头，该测头能够进入低场（LFS）和高场侧（HFS）刮除层（SOLs）以及专用磁通量区域并用于测量较低x点附近的流量。我们报告了从离子B×▽B向底部x点漂移的欧姆和低功率H模式放电的测量结果，并讨论了它们与当前SOL /分流器流量理解的相关性。在欧姆放电中，我们展示了偏滤器SOL和专用磁通量流量曲线的演变，用于增加中心。我们表明，在低密度下，私人通量流主要从HFS导向LFS。在中等高密度下，流动分布变得更加对称，而在非常高密度下，流动方向在LFS分离层上反转，在专用通量内部具有从LFS到HFS的方向。我们讨论了可能影响滤清器流量并产生这种行为的可能机理，并得出结论，两个滤清器支腿之间的压力不对称以及向内滤清器的E×B漂移是一种可能的驱动机制。在HFS SOL中，大多数情况下观察到非常大的马赫数（通常超过M = 1）。在低功率H模式放电中，观察到ELM之间的流动与欧姆流动非常相似。

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