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Title: LHCD and ICRF heating experiments in H-mode plasmas on EAST

An ICRF system with power up to 6.0 MW and a LHCD system up to 4MW have been applied for heating and current drive experiments on EAST. Intensive lithium wall coating was intensively used to reduce particle recycling and Hydrogen concentration in Deuterium plasma, which is needed for effective ICRF and LHCD power absorption in high density plasmas. Significant progress has been made with ICRF heating and LHW current drive for realizing the H-mode plasma operation in EAST. In 2010, H-mode was generated and sustained by LHCD alone, where lithium coating and gas puffing launcher mouth were applied to improve the LHCD power coupling and penetration into the core plasmas at high density of H-modes. During the last two experimental campaigns, ICRF Heating experiments were carried out at the fixed frequency of 27MHz, achieving effective ions and electrons heating with the H Minority Heating (H-MH) mode, where electrons are predominantly heated by collisions with high energy minority ions. The H-MH mode gave the best plasma performance, and realized H-mode alone in 2012. Combination of ICRF and LHW power injection generated the H-mode plasmas with various ELMy characteristics. The first successful application of the ICRF Heating in the D (He3) plasmamore » was also achieved. The progress on ICRF heating, LHCD experiments and their application in achieving H-mode operation from last two years will be discussed in this report.« less
Authors:
; ; ; ; ; ;  [1] ; ;  [2] ;  [3] ;  [4] ;  [5] ; ;  [6] ; ;  [7] ;
  1. Institute of Plasma Physics, Chinese Academy of Sciences, Hefei 230031 (China)
  2. MIT Plasma Science and Fusion Center, Cambridge, MA 02139 (United States)
  3. Princeton Plasma Physics Laboratory (United States)
  4. Max-Planck Institute for Plasma Physics, D-85748, Garching, Germany and University of Gent (Belgium)
  5. Max-Planck Institute for Plasma Physics, D-85748, Garching (Germany)
  6. CEA, IRFM, F-13108 Saint-Paul Lez Durance (France)
  7. National Institute for Fusion Science, Toki (Japan)
Publication Date:
OSTI Identifier:
22263897
Resource Type:
Journal Article
Resource Relation:
Journal Name: AIP Conference Proceedings; Journal Volume: 1580; Journal Issue: 1; Conference: 20. topical conference on radiofrequency power in plasmas, Sorrento (Italy), 25-28 Jun 2013; Other Information: (c) 2014 AIP Publishing LLC; Country of input: International Atomic Energy Agency (IAEA)
Country of Publication:
United States
Language:
English
Subject:
71 CLASSICAL AND QUANTUM MECHANICS, GENERAL PHYSICS; ABSORPTION; COLLISIONS; DENSITY; DEUTERIUM; H-MODE PLASMA CONFINEMENT; HYDROGEN; ICR HEATING; ION CYCLOTRON-RESONANCE; PLASMA DENSITY