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

Journal Article · · Physics of Plasmas
DOI: https://doi.org/10.1063/1.5088156 · OSTI ID:1529325
 [1];  [2];  [2];  [3];  [2];  [2];  [4];  [5]
  1. Univ. of Tennessee, Knoxville, TN (United States); Chinese Academy of Sciences, Anhui (China)
  2. Chinese Academy of Sciences, Anhui (China)
  3. Princeton Plasma Physics Lab. (PPPL), Princeton, NJ (United States)
  4. Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States)
  5. Univ. of Tennessee, Knoxville, TN (United States)

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.

Research Organization:
Univ. of Tennessee, Knoxville, TN (United States); Princeton Plasma Physics Laboratory (PPPL), Princeton, NJ (United States)
Sponsoring Organization:
USDOE Office of Science (SC), Fusion Energy Sciences (FES); USDOE
Contributing Organization:
National Magnetic Confinement Fusion Science Program of China No. 2015GB102000.
Grant/Contract Number:
SC0016915
OSTI ID:
1529325
Alternate ID(s):
OSTI ID: 1544460; OSTI ID: 1557572
Journal Information:
Physics of Plasmas, Vol. 26, Issue 7; ISSN 1070-664X
Publisher:
American Institute of Physics (AIP)Copyright Statement
Country of Publication:
United States
Language:
English

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Figures / Tables (11)