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物理学报  2010 

Investigation of slide-away discharges in HT-7 tokamak
HT-7托卡马克等离子体slide-away放电研究

Keywords: slide-away discharge,tokamak,plasma,runaway electron
slide-away放电
,托卡马克,等离子体,逃逸电子

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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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