Striated Divertor Heat Flux Induced by Effect of Magnetic Topology with
LHCD on EAST Tokamak
X.Z.Gong*, K.F.Gan, Y.Gao, and the EAST team
Institute of Plasma Physics, Chinese Academy of Sciences, P.O.Box 1126, Hefei 230031, China
e-mail address of submitting author* (xz_gong@ipp.ac.cn)
An infrared camera imaging system which provides a wide field of view has been installed on
the Experimental Advanced Superconducting Tokamak (EAST) to monitor the surface
temperatures on plasma facing components. Modified magnetic topology induced by lower
hybrid wave can lead to the formation of striated heat flux on divertor plates which can be
clearly observed by IR camera. In this paper, LHW power modulation is applied to analyze the
appearance of striated heat flux. It is also demonstrated that deuterium pellet injection and
supersonic molecular beam injection can to some extent reduce the heat flux on the outer strike
point, but enhance the striated heat flux on lower outer plates of divertor. This may provide an
optional approach to actively control the distribution of heat flux on diveror plates, which can
protect materials from long duration high-heat flux.
Keywords: LHCD, heat flux, infrared camera
[1] Abstract submission deadline is 30 April, 2015. Please send your abstract to Dr. Xiang HAN
by the email (hanx@ipp.ac.cn).
[2] Please prepare for your abstract according to the above Abstract Example. The home page of
APTWG 2015 international conference is http://demo.ipp.ac.cn/html/aptwg2015/.