Continuous, edge localized ion heating during non-solenoidal plasma startup and sustainment in a low aspect ratio tokamak
作者: M.G. BurkeJ.L. BarrM.W. BongardR.J. FonckE.T. HinsonJ.M. PerryJ.A. ReuschD.J. Schlossberg
作者单位: 1Department of Engineering Physics, University of Wisconsin-Madison, Madison, WI 53706, United States of America
刊名: Nuclear Fusion, 2017, Vol.57 (7)
来源数据库: Institute of Physics Journal
DOI: 10.1088/1741-4326/aa6f2b
原始语种摘要: Plasmas in the Pegasus spherical tokamak are initiated and grown by the non-solenoidal local helicity injection (LHI) current drive technique. The LHI system consists of three adjacent electron current sources that inject multiple helical current filaments that can reconnect with each other. Anomalously high impurity ion temperatures are observed during LHI with T i,OV ⩽ 650 eV, which is in contrast to T i,OV ⩽ 70 eV from Ohmic heating alone. Spatial profiles of T i,OV indicate an edge localized heating source, with T i,OV ~ 650 eV near the outboard major radius of the injectors and dropping to ~150 eV near the plasma magnetic axis. Experiments without a background tokamak plasma indicate the ion heating results from magnetic reconnection...
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  • tokamak 托卡马克
  • Continuous 持续的
  • solenoidal 螺线管的
  • heating 加热
  • plasma 深绿玉髓
  • aspect 季相
  • reconnect 重新连接
  • localized 修]定位[域
  • current 
  • outboard 外侧