Open AccessInvestigation of slide-away discharges in HT-7 tokamak
Author(s) -
Lu Hong-Wei,
Liqun Hu,
Shiyao Lin,
Zhong Guoqiang,
Ran Zhou,
Jizong Zhang
Publication year - 2010
Publication title -
wuli xuebao
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.199
H-Index - 47
ISSN - 1000-3290
DOI - 10.7498/aps.59.5596
Subject(s) - tokamak , plasma , atomic physics , electron , electron density , physics , materials science , nuclear physics
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.