...
  • 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 >Search for zonal flows in the edge turbulence of Alcator C-Mod
【24h】

Search for zonal flows in the edge turbulence of Alcator C-Mod

机译：在Alcator C-Mod的边缘湍流中搜索区域流

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 time-dependent radial and poloidal velocity of edge turbulence is evaluated using a 2D time-delayed cross-correlation analysis of fast camera data from the gas puff imaging (GPI) diagnostic viewing the outer midplane region in Alcator C-Mod. The local poloidal velocity fluctuations are averaged over the poloidal viewing region of the GPI diagnostic and radially resolved over ±2cm around the separatrix. The resulting poloidal velocity usually has a broadband frequency spectrum in the range 120kHz, and a radial correlation width which decreases with increasing line-averaged density. In some cases with ICRH heating there was also a coherent poloidal velocity oscillation at 67kHz which was highly correlated with a poloidal magnetic field oscillation at the same frequency. Some of these results are similar to the geodesic acoustic modes and/or zonal flows described in previous experiments and theory.
机译：使用二维时间延迟互相关分析来评估边缘湍流随时间变化的径向和径向速度，该快速相关数据来自气嘴成像（GPI）诊断程序，通过Alcator C-Mod的外部中平面区域进行诊断。局部极点速度波动是在GPI诊断仪的极向观察区域内平均的，并在分离线周围±2cm范围内得到径向分辨。所得的极向速度通常具有120kHz范围内的宽带频谱，并且径向相关宽度随线平均密度的增加而减小。在使用ICRH加热的某些情况下，在67kHz处还存在相干的倍数速度振荡，这与相同频率下的倍数磁场振荡高度相关。这些结果中的一些类似于先前实验和理论中描述的测地线声模和/或纬向流。

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