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Investigation of slide-away discharges in HT-7 tokamak

Lu Hong-Wei Hu Li-Qun Lin Shi-Yao Zhong Guo-Qiang Zhou Rui-Jie Zhang Ji-Zong

Investigation of slide-away discharges in HT-7 tokamak

Lu Hong-Wei, Hu Li-Qun, Lin Shi-Yao, Zhong Guo-Qiang, Zhou Rui-Jie, Zhang Ji-Zong
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  • Abstract views:  3656
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  • Received Date:  24 August 2009
  • Accepted Date:  23 November 2009
  • Published Online:  15 August 2010

Investigation of slide-away discharges in HT-7 tokamak

  • 1. Institute of Plasma Physics, Chinese Academy of Sciences, Hefei 230031, China

Abstract: In tokamak plasmas, the discharge will turn into "runaway" discharge if the density decays to a critical one. The discharge will enter into "slide-away" discharge if the density reaches a lower level. The slide-away discharge is characterized by high confinement of superthermal electrons which constitute a large part of plasma current. In HT-7 Tokamak, the slide-away discharge is achieved by reducing the plasma density. The relationship between plasma current and critical density of slide-away discharge is investigated. It is also find that the increase of density in slide-away discharge can make the confinement of superthermal electrons poor and lots of superthermal electrons lost from the vacuum chamber.

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