ELM-free and inter-ELM divertor heat flux broadening induced by edge harmonics oscillation in NSTX
作者: K.F. GanJ.-W. AhnT.K. GrayS.J. ZwebenE.D. FredricksonF. ScottiR. MaingiJ.-K. ParkG.P. CanalV.A. SoukhanovskiiA.G. McleanB.D. Wirth
作者单位: 1University of Tennessee, Knoxville, TN, United States of America
2Oak Ridge National Laboratory, Oak Ridge, TN, United States of America
3Princeton Plasma Physics Laboratory, Princeton, NJ, United States of America
4Lawrence Livermore National Laboratory, Livermore, CA 94550, United States of America
5General Atomics, PO Box 85608, San Diego, CA 92186-5608, United States of America
刊名: Nuclear Fusion, 2017, Vol.57 (12)
来源数据库: Institute of Physics Journal
DOI: 10.1088/1741-4326/aa8c4a
原始语种摘要: A new n = 1 dominated edge harmonic oscillation (EHO) has been found in NSTX. The new EHO, rotating toroidally in the counter-current direction and the opposite direction of the neutral beam, was observed during certain inter-ELM and ELM-free periods of H-mode operation. This EHO is associated with a significant broadening of the integral heat flux width () by up to 150%, and a decrease in the divertor peak heat flux by >60%. An EHO induced filament was also observed by the gas puff imaging diagnostic. The toroidal rotating filaments could change the edge magnetic topology resulting in toroidal rotating strike point splitting and heat flux broadening. Experimental result of the counter current rotation of strike points splitting is consistent with the counter-current EHO.
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  • broadening 扩展
  • divertor 分流偏滤器
  • harmonics 低函数
  • inter 
  • resulting 引起的
  • oscillation 振荡
  • induced 感应的
  • counter 计数器
  • rotating 转动的
  • current