Study of Striated Heat Flux on EAST Divertor Plates Induced by LHW Using Infrared Camera

GAO Yu(高宇); GAN Kaifu(甘开福); GONG Xianzu(龚先祖); GAO Xiang(高翔); LIANG Yunfeng(梁云峰); EAST Team

doi:10.1088/1009-0630/16/2/02

Plasma Science and Technology > 2014 > 16(2): 93-98. > DOI: 10.1088/1009-0630/16/2/02

GAO Yu(高宇), GAN Kaifu(甘开福), GONG Xianzu(龚先祖), GAO Xiang(高翔), LIANG Yunfeng(梁云峰), EAST Team. Study of Striated Heat Flux on EAST Divertor Plates Induced by LHW Using Infrared Camera[J]. Plasma Science and Technology, 2014, 16(2): 93-98. DOI: 10.1088/1009-0630/16/2/02

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Study of Striated Heat Flux on EAST Divertor Plates Induced by LHW Using Infrared Camera

1 Institute of Plasma Physics, Chinese Academy of Sciences, Hefei 230031, China 2 Forschungszentrum Jülich GmbH, IEK-4, 52425 Jülich, Germany

Funds: supported by National Natural Science Foundation of China (No.11275234) and the National Magnetic Confinement Fusion Program of China (No.2014GB106001)

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Received Date: August 20, 2013

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Abstract

Abstract

An upgraded infrared (IR) imaging system which provides a wide field of view (FOV) 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 (LHW) can lead to the formation of striated heat flux (SHF) on divertor plates which can be clearly observed by IR camera. In this paper, LHW power modulation is applied to analyze the appearance of SHF. It is also demonstrated that deuterium (D) pellet injection and supersonic molecular beam injection (SMBI) can to some extent reduce the heat flux on the outer strike point (OSP), but enhance the SHF on lower outer plates (LOP) 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.
- LHW,
- divertor,
- heat flux,
- infrared camera

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References (11)

References

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