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Title: The dynamics of short-scale turbulent fluctuations across low-intermediate-high-confinement transition with lower hybrid current drive in the EAST superconducting tokamak

Abstract

Two different confinement transition discharges, the low-intermediate-high (L-I-H) and the low-intermediate-low (L-I-L) confinement transitions, respectively, have been obtained by lower hybrid current drive with lithium wall conditioning in the EAST superconducting tokamak. The dynamic features of short-scale turbulent fluctuations in the two discharges are investigated by a tangential CO{sub 2} laser collective scattering system. It is found that the great changes of broadband fluctuations in amplitude and structure characteristics are closely related to the choice of the final transition to H-mode. These results could shed light on the understanding of the L-H transition mechanism.

Authors:
; ; ; ; ;  [1]
  1. Institute of Plasma Physics, Chinese Academy of Sciences, P.O. Box 1126, Hefei, Anhui 230031 (China)
Publication Date:
OSTI Identifier:
22408100
Resource Type:
Journal Article
Resource Relation:
Journal Name: Physics of Plasmas; Journal Volume: 22; Journal Issue: 2; Other Information: (c) 2015 AIP Publishing LLC; Country of input: International Atomic Energy Agency (IAEA)
Country of Publication:
United States
Language:
English
Subject:
70 PLASMA PHYSICS AND FUSION TECHNOLOGY; AMPLITUDES; CARBON DIOXIDE LASERS; FLUCTUATIONS; H-MODE PLASMA CONFINEMENT; HT-7U TOKAMAK; LITHIUM; LOWER HYBRID CURRENT DRIVE; SCATTERING

Citation Formats

Cao, G. M., Li, Y. D., Zhang, X. D., Sun, P. J., Wu, G. J., and Hu, L. Q.. The dynamics of short-scale turbulent fluctuations across low-intermediate-high-confinement transition with lower hybrid current drive in the EAST superconducting tokamak. United States: N. p., 2015. Web. doi:10.1063/1.4907778.
Cao, G. M., Li, Y. D., Zhang, X. D., Sun, P. J., Wu, G. J., & Hu, L. Q.. The dynamics of short-scale turbulent fluctuations across low-intermediate-high-confinement transition with lower hybrid current drive in the EAST superconducting tokamak. United States. doi:10.1063/1.4907778.
Cao, G. M., Li, Y. D., Zhang, X. D., Sun, P. J., Wu, G. J., and Hu, L. Q.. Sun . "The dynamics of short-scale turbulent fluctuations across low-intermediate-high-confinement transition with lower hybrid current drive in the EAST superconducting tokamak". United States. doi:10.1063/1.4907778.
@article{osti_22408100,
title = {The dynamics of short-scale turbulent fluctuations across low-intermediate-high-confinement transition with lower hybrid current drive in the EAST superconducting tokamak},
author = {Cao, G. M. and Li, Y. D. and Zhang, X. D. and Sun, P. J. and Wu, G. J. and Hu, L. Q.},
abstractNote = {Two different confinement transition discharges, the low-intermediate-high (L-I-H) and the low-intermediate-low (L-I-L) confinement transitions, respectively, have been obtained by lower hybrid current drive with lithium wall conditioning in the EAST superconducting tokamak. The dynamic features of short-scale turbulent fluctuations in the two discharges are investigated by a tangential CO{sub 2} laser collective scattering system. It is found that the great changes of broadband fluctuations in amplitude and structure characteristics are closely related to the choice of the final transition to H-mode. These results could shed light on the understanding of the L-H transition mechanism.},
doi = {10.1063/1.4907778},
journal = {Physics of Plasmas},
number = 2,
volume = 22,
place = {United States},
year = {Sun Feb 15 00:00:00 EST 2015},
month = {Sun Feb 15 00:00:00 EST 2015}
}