Effect of sawtooth crashes on fast ion distribution in NSTX-U
作者: D. LiuW.W. HeidbrinkM. PodestàG.Z. HaoD.S. DarrowE.D. FredricksonD. Kim
作者单位: 1Department of Physics and Astronomy, University of California-Irvine, Irvine, CA 92697, United States of America
2Princeton Plasma Physics Laboratory, Princeton, NJ 08543, United States of America
刊名: Nuclear Fusion, 2018, Vol.58 (8)
来源数据库: Institute of Physics Journal
DOI: 10.1088/1741-4326/aac64f
原始语种摘要: During the 2016 experimental campaign of NSTX-U (Menard et al 2012 Nucl. Fusion 52 083015), long L-mode and reproducible sawtoothing plasmas have been achieved that were previously not accessible before the upgrade. This provides a good opportunity to study the effect of sawtooth crashes on fast ion confinement and redistribution in spherical tokamaks. The solid-state neutral particle analyzer (SSNPA) and fast ion D-alpha (FIDA) diagnostics on NSTX-U each have a tangentially-viewing instrument and a radially- or vertically-viewing instrument, which are mainly sensitive to passing and trapped fast ions, respectively. It has been observed on both diagnostics that passing particles are strongly expelled from the plasma core to the edge during sawtooth crashes, while trapped fast ions are...
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  • sawtooth 上向梯段回采
  • viewing 观察
  • neutron 中子
  • passing 通过的
  • core 岩心
  • diagnostics 诊断学
  • vertically 竖直地
  • instrument 工具
  • trapped 捕集了的
  • radially 放射的