Lower hybrid current drive experiments with different launched wave frequencies in the EAST tokamak
Li, M. H.; Ding, B. J.; Liu, F. K.; Shan, J. F.; Wang, M.; Xu, H. D.; Liu, L.; Hu, H. C.; Zhang, X. J.; Li, Y. C.; Wei, W.; Wu, Z. G.; Ma, W. D.; Yang, Y.; Feng, J. Q.; Jia, H.; Wang, X. J.; Wu, D. J.; Chen, M.; Xu, L.; Wang, J.; Lin, S. Y.; Zhang, J. Z.; Qian, J. P.; Luo, Z. P.; Zang, Q.; Han, X. F.; Zhao, H. L.; Peysson, Y.; Decker, J.; Ekedahl, A.; Hillairet, J.; Goniche, M.; EAST Team
2016

Abstract

EAST has been equipped with two high power lower hybrid current drive (LHCD) systems with operating frequencies of 2.45 GHz and 4.6 GHz. Comparative LHCD experiments with the two different frequencies were performed in the same conditions of plasma for the first time. It was found that current drive (CD) efficiency and plasma heating effect are much better for 4.6 GHz LH waves than for the one with 2.45 GHz. High confinement mode (H-mode) discharges with 4.6 GHz LHCD as the sole auxiliary heating source have been obtained in EAST and the confinement is higher with respect to that produced previously by 2.45 GHz. A combination of ray-tracing and Fokker-Planck calculations by using the C3PO/LUKE codes was performed in order to explain the different experimental observations between the two waves. In addition, the frequency spectral broadening of the two LH wave operating frequencies was surveyed by using a radio frequency probe. Published by AIP Publishing.

Details

Title Lower hybrid current drive experiments with different launched wave frequencies in the EAST tokamak
Author(s) Li, M. H. ; Ding, B. J. ; Liu, F. K. ; Shan, J. F. ; Wang, M. ; Xu, H. D. ; Liu, L. ; Hu, H. C. ; Zhang, X. J. ; Li, Y. C. ; Wei, W. ; Wu, Z. G. ; Ma, W. D. ; Yang, Y. ; Feng, J. Q. ; Jia, H. ; Wang, X. J. ; Wu, D. J. ; Chen, M. ; Xu, L. ; Wang, J. ; Lin, S. Y. ; Zhang, J. Z. ; Qian, J. P. ; Luo, Z. P. ; Zang, Q. ; Han, X. F. ; Zhao, H. L. ; Peysson, Y. ; Decker, J. ; Ekedahl, A. ; Hillairet, J. ; Goniche, M. ; EAST Team
Published in Physics Of Plasmas
Pagination 9
Volume 23
Issue 10
Pages 102512
Date 2016
Publisher Melville, Amer Inst Physics
ISSN 1070-664X
DOI https://doi.org/10.1063/1.4965904
Other identifier(s) View record in Web of Science
Laboratories SPC
Record Appears in Scientific production and competences > SB - School of Basic Sciences > SPC - Swiss Plasma Center > SPC - Swiss Plasma Center
Peer-reviewed publications
Work produced at EPFL
Journal Articles
Published
Record creation date 2017-01-24

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