High-k turbulence characteristics in density modulation experiments of EAST

F. Chen; P. Li; Y. D. Li; X. J. Wang; G. J. Wu; J. S. Geng; Y. H. Wang; N. Sun; P. J. Sun; M. Wang; B. J. Ding; C. B. Wu; E. Z. Li; T. F. Zhou; H. L. Zhao; Q. Zang; S. X. Wang; H. Q. Liu; Y. F. Jin; B. Lyu; J. G. Li

doi:10.1063/5.0197005

High-k turbulence characteristics in density modulation experiments of EAST

F. Chen
, P. Li
, Y. D. Li
, X. J. Wang
, G. J. Wu
, J. S. Geng
, Y. H. Wang
, N. Sun
, P. J. Sun
, M. Wang
, B. J. Ding
, C. B. Wu
, E. Z. Li
, T. F. Zhou
, H. L. Zhao
, Q. Zang
, S. X. Wang
, H. Q. Liu
, Y. F. Jin
, B. Lyu

J. G. Li

电气工程学院

CAS - Institute of Plasma Physics
University of Science and Technology of China

科研成果: 期刊稿件 › 文章 › 同行评审

2 引用（Scopus）

摘要

High-k turbulence (1 < k_θρ_s < 5) spectrograms have been directly measured in density modulation experiments of the EAST tokamak using the collective Thomson scattering diagnostic system. Density-peaking modulation is achieved in Lower Hybrid Wave (LHW) modulation experiments, revealing that the broadband turbulence is sensitive to the power modulation of LHW and the concomitant variation of density-peaking. Additionally, the contributions of 2.45/4.6 GHz LHW to density peaking differ when Neutral Beam Injection (NBI) is on/off, displaying distinct responses of broadband turbulence in low/high frequency ranges. It is found by cross-coherence analysis that the phase angle is negative in cases without NBI, while in NBI cases it can be modulated from negative to positive, indicating a significant transition of radial turbulence propagation. These findings highlight the active control of density-peaking via auxiliary heating in tokamak plasmas and suggest the potential role of high-k turbulence in density-peaking modulation.

源语言	英语
文章编号	065213
期刊	AIP Advances
卷	14
期	6
DOI	https://doi.org/10.1063/5.0197005
出版状态	已出版 - 1 6月 2024

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Chen, F., Li, P., Li, Y. D., Wang, X. J., Wu, G. J., Geng, J. S., Wang, Y. H., Sun, N., Sun, P. J., Wang, M., Ding, B. J., Wu, C. B., Li, E. Z., Zhou, T. F., Zhao, H. L., Zang, Q., Wang, S. X., Liu, H. Q., Jin, Y. F., ... Li, J. G. (2024). High-k turbulence characteristics in density modulation experiments of EAST. AIP Advances, 14(6), 文章 065213. https://doi.org/10.1063/5.0197005

@article{f5e2f6b99b1f43d497a9728d7266185b,

title = "High-k turbulence characteristics in density modulation experiments of EAST",

abstract = "High-k turbulence (1 < kθρs < 5) spectrograms have been directly measured in density modulation experiments of the EAST tokamak using the collective Thomson scattering diagnostic system. Density-peaking modulation is achieved in Lower Hybrid Wave (LHW) modulation experiments, revealing that the broadband turbulence is sensitive to the power modulation of LHW and the concomitant variation of density-peaking. Additionally, the contributions of 2.45/4.6 GHz LHW to density peaking differ when Neutral Beam Injection (NBI) is on/off, displaying distinct responses of broadband turbulence in low/high frequency ranges. It is found by cross-coherence analysis that the phase angle is negative in cases without NBI, while in NBI cases it can be modulated from negative to positive, indicating a significant transition of radial turbulence propagation. These findings highlight the active control of density-peaking via auxiliary heating in tokamak plasmas and suggest the potential role of high-k turbulence in density-peaking modulation.",

author = "F. Chen and P. Li and Li, \{Y. D.\} and Wang, \{X. J.\} and Wu, \{G. J.\} and Geng, \{J. S.\} and Wang, \{Y. H.\} and N. Sun and Sun, \{P. J.\} and M. Wang and Ding, \{B. J.\} and Wu, \{C. B.\} and Li, \{E. Z.\} and Zhou, \{T. F.\} and Zhao, \{H. L.\} and Q. Zang and Wang, \{S. X.\} and Liu, \{H. Q.\} and Jin, \{Y. F.\} and B. Lyu and Li, \{J. G.\}",

note = "Publisher Copyright: {\textcopyright} 2024 Author(s).",

year = "2024",

month = jun,

day = "1",

doi = "10.1063/5.0197005",

language = "英语",

volume = "14",

journal = "AIP Advances",

issn = "2158-3226",

publisher = "American Institute of Physics",

number = "6",

}

TY - JOUR

T1 - High-k turbulence characteristics in density modulation experiments of EAST

AU - Chen, F.

AU - Li, P.

AU - Li, Y. D.

AU - Wang, X. J.

AU - Wu, G. J.

AU - Geng, J. S.

AU - Wang, Y. H.

AU - Sun, N.

AU - Sun, P. J.

AU - Wang, M.

AU - Ding, B. J.

AU - Wu, C. B.

AU - Li, E. Z.

AU - Zhou, T. F.

AU - Zhao, H. L.

AU - Zang, Q.

AU - Wang, S. X.

AU - Liu, H. Q.

AU - Jin, Y. F.

AU - Lyu, B.

AU - Li, J. G.

PY - 2024/6/1

Y1 - 2024/6/1

N2 - High-k turbulence (1 < kθρs < 5) spectrograms have been directly measured in density modulation experiments of the EAST tokamak using the collective Thomson scattering diagnostic system. Density-peaking modulation is achieved in Lower Hybrid Wave (LHW) modulation experiments, revealing that the broadband turbulence is sensitive to the power modulation of LHW and the concomitant variation of density-peaking. Additionally, the contributions of 2.45/4.6 GHz LHW to density peaking differ when Neutral Beam Injection (NBI) is on/off, displaying distinct responses of broadband turbulence in low/high frequency ranges. It is found by cross-coherence analysis that the phase angle is negative in cases without NBI, while in NBI cases it can be modulated from negative to positive, indicating a significant transition of radial turbulence propagation. These findings highlight the active control of density-peaking via auxiliary heating in tokamak plasmas and suggest the potential role of high-k turbulence in density-peaking modulation.

AB - High-k turbulence (1 < kθρs < 5) spectrograms have been directly measured in density modulation experiments of the EAST tokamak using the collective Thomson scattering diagnostic system. Density-peaking modulation is achieved in Lower Hybrid Wave (LHW) modulation experiments, revealing that the broadband turbulence is sensitive to the power modulation of LHW and the concomitant variation of density-peaking. Additionally, the contributions of 2.45/4.6 GHz LHW to density peaking differ when Neutral Beam Injection (NBI) is on/off, displaying distinct responses of broadband turbulence in low/high frequency ranges. It is found by cross-coherence analysis that the phase angle is negative in cases without NBI, while in NBI cases it can be modulated from negative to positive, indicating a significant transition of radial turbulence propagation. These findings highlight the active control of density-peaking via auxiliary heating in tokamak plasmas and suggest the potential role of high-k turbulence in density-peaking modulation.

UR - https://www.scopus.com/pages/publications/85195501405

U2 - 10.1063/5.0197005

DO - 10.1063/5.0197005

M3 - 文章

AN - SCOPUS:85195501405

SN - 2158-3226

VL - 14

JO - AIP Advances

JF - AIP Advances

IS - 6

M1 - 065213

ER -

High-k turbulence characteristics in density modulation experiments of EAST

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