Multiple striated heat fluxes patterns on the EAST first wall generated by lower hybrid wave absorption in the scrape-off layer

K. F. Gan; M. H. Li; X. Z. Gong; R. Maingi; B. Zhang; M. W. Chen; T. K. Gray; B. D. Wirth

doi:10.1063/1.5088156

Multiple striated heat fluxes patterns on the EAST first wall generated by lower hybrid wave absorption in the scrape-off layer

K. F. Gan, M. H. Li, X. Z. Gong, R. Maingi, B. Zhang, M. W. Chen, T. K. Gray, B. D. Wirth

Power Exhaust and Particle Control

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3 Scopus citations

Abstract

Multiple striated heat fluxes on the Experimental Advanced Superconducting Tokamak (EAST) first wall are observed with lower hybrid wave (LHW) heating on the EAST device. Our analysis indicates that the heat source for the striated heat flux is from LHW absorption in the scrape-off layer (SOL). Magnetic field line tracing from the front of the LHW antenna grills is in good agreement with the striated heat flux profile. In addition, the relative intensity of the LHW absorption in the SOL is consistent with the measured striated heat flux. Furthermore, the heat flux at inner strike points and outer strike points significantly decreased when the ion cyclotron resonance frequency (ICRF) wave was switched off, while there was no change for the striated heat flux, which suggests that the striated heat flux is independent of the injected power to the core plasma.

Original language	English
Article number	072506
Journal	Physics of Plasmas
Volume	26
Issue number	7
DOIs	https://doi.org/10.1063/1.5088156
State	Published - Jul 1 2019

Funding

This work was supported by the U.S. DOE Contract No. DE-SC0016915 and the National Magnetic Confinement Fusion Science Program of China No. 2015GB102000.

Funders	Funder number
U.S. DOE	DE-SC0016915
National Magnetic Confinement Fusion Program of China	2015GB102000

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10.1063/1.5088156

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abstract = "Multiple striated heat fluxes on the Experimental Advanced Superconducting Tokamak (EAST) first wall are observed with lower hybrid wave (LHW) heating on the EAST device. Our analysis indicates that the heat source for the striated heat flux is from LHW absorption in the scrape-off layer (SOL). Magnetic field line tracing from the front of the LHW antenna grills is in good agreement with the striated heat flux profile. In addition, the relative intensity of the LHW absorption in the SOL is consistent with the measured striated heat flux. Furthermore, the heat flux at inner strike points and outer strike points significantly decreased when the ion cyclotron resonance frequency (ICRF) wave was switched off, while there was no change for the striated heat flux, which suggests that the striated heat flux is independent of the injected power to the core plasma.",

author = "Gan, {K. F.} and Li, {M. H.} and Gong, {X. Z.} and R. Maingi and B. Zhang and Chen, {M. W.} and Gray, {T. K.} and Wirth, {B. D.}",

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AU - Gan, K. F.

AU - Li, M. H.

AU - Gong, X. Z.

AU - Maingi, R.

AU - Zhang, B.

AU - Chen, M. W.

AU - Gray, T. K.

AU - Wirth, B. D.

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Multiple striated heat fluxes patterns on the EAST first wall generated by lower hybrid wave absorption in the scrape-off layer

Abstract

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