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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)
+ Show Author Affiliations

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

References (15)

Lower hybrid wave edge power loss quantification on the Alcator C-Mod tokamak journal May 2016
Bright spots generated by lower hybrid waves on JET journal June 2005
LH Power Losses In Front of the JET Launcher
  • Jacquet, P.; Arnoux, G.; Colas, L.
  • RADIO FREQUENCY POWER IN PLASMAS: Proceedings of the 18th Topical Conference, AIP Conference Proceedings https://doi.org/10.1063/1.3273776
conference January 2009
Divertor heat flux mitigation by using supersonic molecular beam injection in the HL-2A tokamak journal August 2017
Heat loads on JET plasma facing components from ICRF and LH wave absorption in the SOL journal August 2011
First three-dimensional edge plasma transport simulations with magnetic perturbations induced by lower hybrid waves on EAST journal July 2018
Enhanced heat flux in the scrape-off layer due to electrons accelerated in the near field of lower hybrid grills journal June 1998
Comparison between gas puffing and supersonic molecular beam injection in plasma density feedback experiments in EAST journal October 2013
Hot spots generated by low hybrid wave absorption in the SOL on the EAST tokamak journal July 2013
Fast-wave power flow along SOL field lines in NSTX and the associated power deposition profile across the SOL in front of the antenna journal July 2013
Study of Divertor Heat Patterns Induced by LHCD L-Mode Plasmas Using an Infra-Red Camera System on EAST journal October 2015
A long-pulse high-confinement plasma regime in the Experimental Advanced Superconducting Tokamak journal November 2013
Evidence and modeling of 3D divertor footprint induced by lower hybrid waves on EAST with tungsten divertor operations journal October 2017
Strong toroidal asymmetries in power deposition on divertor and first wall components during LHCD on TdeV and Tore Supra journal February 1997
Magnetic Topology Changes Induced by Lower Hybrid Waves and their Profound Effect on Edge-Localized Modes in the EAST Tokamak journal June 2013

Figures / Tables (11)

Fig. 1(p. 2)figure Fig. 1
Fig. 2(p. 4)figure Fig. 2
Fig. 3(p. 5)figure Fig. 3
Fig. 4(p. 6)figure Fig. 4
Fig. 5(p. 7)figure Fig. 5
Fig. 6(p. 8)figure Fig. 6
Fig. 7(p. 9)figure Fig. 7
Fig. 8(p. 11)figure Fig. 8
Fig. 9(p. 11)figure Fig. 9
Fig. 10(p. 13)figure Fig. 10
Fig. 11(p. 14)figure Fig. 11

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