Steady state plasma operation in RF dominated regimes on EAST

Zhang, X. J.; Zhao, Y. P.; Gong, X. Z.; Hu, C. D.; Liu, F. K.; Hu, L. Q.; Li, J. G.

doi:10.1063/1.4936477

Title: Steady state plasma operation in RF dominated regimes on EAST

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Abstract

Significant progress has recently been made on EAST in the 2014 campaign, including the enhanced CW H&CD system over 20MW heating power (LHCD, ICRH and NBI), more than 70 diagnostics, ITER-like W-monoblock on upper divertor, two inner cryo-pumps and RMP coils, enabling EAST to investigate long pulse H mode operation with dominant electron heating and low torque to address the critical issues for ITER. H-mode plasmas were achieved by new H&CD system or 4.6GHz LHCD alone for the first time. Long pulse high performance H mode has been obtained by LHCD alone up to 28s at H{sub 98}∼1.2 or by combing of ICRH and LHCD, no or small ELM was found in RF plasmas, which is essential for steady state operation in the future Tokamak. Plasma operation in low collision regimes were implemented by new 4.6GHz LHCD with core Te∼4.5keV. The non-inductive scenarios with high performance at high bootstrap current fraction have been demonstrated in RF dominated regimes for long pulse operation. Near full non-inductive CD discharges have been achieved. In addition, effective heating and decoupling method under multi-transmitter for ICRF system were developed in this campaign, etc. EAST could be in operation with over 30MW CW heating and currentmore »« less

Authors:

Zhang, X. J.; Zhao, Y. P.; Gong, X. Z.; Hu, C. D.; Liu, F. K.; Hu, L. Q.; Li, J. G. ^[1]

Institute of Plasma Physics, Chinese Academy of Sciences, Hefei 230031 (China)

Publication Date:: Thu Dec 10 00:00:00 EST 2015

OSTI Identifier:: 22496188

Resource Type:: Journal Article

Journal Name:: AIP Conference Proceedings

Additional Journal Information:: Journal Volume: 1689; Journal Issue: 1; Conference: 21. topical conference on radio frequency power in plasmas, Lake Arrowhead, CA (United States), 27-29 Apr 2015; Other Information: (c) 2015 AIP Publishing LLC; Country of input: International Atomic Energy Agency (IAEA); Journal ID: ISSN 0094-243X

Country of Publication:: United States

Language:: English

Subject:: 71 CLASSICAL AND QUANTUM MECHANICS, GENERAL PHYSICS; BOOTSTRAP CURRENT; COLLISIONS; ECR HEATING; EDGE LOCALIZED MODES; ELECTRONS; H-MODE PLASMA CONFINEMENT; ICR HEATING; ION CYCLOTRON-RESONANCE; ITER TOKAMAK; LOWER HYBRID CURRENT DRIVE; METALS; PERFORMANCE; PLASMA; PULSES; PUMPS; RADIOWAVE RADIATION; STEADY-STATE CONDITIONS; TORQUE

Citation Formats


                    Zhang, X. J., Zhao, Y. P., Gong, X. Z., Hu, C. D., Liu, F. K., Hu, L. Q., Wan, B. N., E-mail: bnwan@ipp.ac.cn, and Li, J. G. Steady state plasma operation in RF dominated regimes on EAST.  United States: N. p., 2015. 
        Web.  doi:10.1063/1.4936477.

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                    Zhang, X. J., Zhao, Y. P., Gong, X. Z., Hu, C. D., Liu, F. K., Hu, L. Q., Wan, B. N., E-mail: bnwan@ipp.ac.cn, & Li, J. G. Steady state plasma operation in RF dominated regimes on EAST.  United States.  https://doi.org/10.1063/1.4936477

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                    Zhang, X. J., Zhao, Y. P., Gong, X. Z., Hu, C. D., Liu, F. K., Hu, L. Q., Wan, B. N., E-mail: bnwan@ipp.ac.cn, and Li, J. G. 2015.  
        "Steady state plasma operation in RF dominated regimes on EAST".  United States.  https://doi.org/10.1063/1.4936477.

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@article{osti_22496188,

  title        = {Steady state plasma operation in RF dominated regimes on EAST},

  author       = {Zhang, X. J. and Zhao, Y. P. and Gong, X. Z. and Hu, C. D. and Liu, F. K. and Hu, L. Q. and Wan, B. N., E-mail: bnwan@ipp.ac.cn and Li, J. G.},

  abstractNote = {Significant progress has recently been made on EAST in the 2014 campaign, including the enhanced CW H&CD system over 20MW heating power (LHCD, ICRH and NBI), more than 70 diagnostics, ITER-like W-monoblock on upper divertor, two inner cryo-pumps and RMP coils, enabling EAST to investigate long pulse H mode operation with dominant electron heating and low torque to address the critical issues for ITER. H-mode plasmas were achieved by new H&CD system or 4.6GHz LHCD alone for the first time. Long pulse high performance H mode has been obtained by LHCD alone up to 28s at H{sub 98}∼1.2 or by combing of ICRH and LHCD, no or small ELM was found in RF plasmas, which is essential for steady state operation in the future Tokamak. Plasma operation in low collision regimes were implemented by new 4.6GHz LHCD with core Te∼4.5keV. The non-inductive scenarios with high performance at high bootstrap current fraction have been demonstrated in RF dominated regimes for long pulse operation. Near full non-inductive CD discharges have been achieved. In addition, effective heating and decoupling method under multi-transmitter for ICRF system were developed in this campaign, etc. EAST could be in operation with over 30MW CW heating and current drive power (LHCD ICRH NBI and ECRH), enhanced diagnostic capabilities and full actively-cooled metal wall from 2015. It will therefore allow to access new confinement regimes and to extend these regimes towards to steady state operation.},

  doi          = {10.1063/1.4936477},

  url          = {https://www.osti.gov/biblio/22496188},
  journal      = {AIP Conference Proceedings},

  issn         = {0094-243X},

  number       = 1,

  volume       = 1689,

  place        = {United States},

  year         = {Thu Dec 10 00:00:00 EST 2015},

  month        = {Thu Dec 10 00:00:00 EST 2015}

}

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