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Title: Research on long pulse ECRH system of EAST in support of ITER

Abstract

Experimental Advanced Superconducting Tokamak (EAST), as a fully superconducting tokamak in China, aims to achieve high performance plasma under steady-state operation. To fulfill the physical objectives of EAST, a program of 4-MW long pulse electron cyclotron resonance heating and current drive (EC H&CD) system, which would offer greater flexibility for plasma shape and plasma stabilization has been launched on EAST since 2011. The system, composed of 4 gyrotrons with nominal 1MW output power and 1000s pulse length each, is designed with the feature of steerable power handling capabilities at 140 GHz, using second harmonic of the extraordinary mode(X2). The missions of the ECRH system are to provide plasma heating, current drive, plasma profile tailoring and control of magneto-hydrodynamic (MHD) instabilities. Presently, the first two 140-GHz 1-MW gyrotrons, provided by GYCOM and CPI, respectively, have been tested at long pulse operation. The tubes, the associated power supplies, cooling system, cryogenic plant, 2 transmission lines and an equatorial launcher are now installed at EAST. The power generated from each tube will be transmitted by an evacuated corrugated waveguide transmission line and injected into plasma from the low field side (radial port) through a front steering equatorial launcher. Considering the diverse applications of themore » EC system, the beam’s launch angles can be continuously varied with the optimized scanning range of over 30° in poloidal direction and ±25° in toroidal, as well as the polarization could be adjusted during the discharge by the orientations of a pair of polarizers in the transmission line to maintain the highest absorption for different operational scenarios. The commissioning of the first 2MW ECRH plant for EAST is under way. The design, R&D activities and recent progress of the long pulse 140-GHz ECRH system are presented in this paper. As the technological requirements for EAST ECRH have many similarities with ITER devices, the installation and experience of EAST ECRH system may provide valuable data for the ITER.« less

Authors:
; ; ; ; ; ; ; ; ; ; ; ; ; ;  [1];  [1]
  1. Institute of Plasma Physics Chinese Academy of Sciences, Shushan lake road 350, 230031, Hefei (China)
Publication Date:
OSTI Identifier:
22496230
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; COMMISSIONING; ECR HEATING; GHZ RANGE 100-1000; HT-7U TOKAMAK; ITER TOKAMAK; MAGNETOHYDRODYNAMICS; MICROWAVE AMPLIFIERS; PLASMA; PLASMA MACROINSTABILITIES; PLASMA RADIAL PROFILES; POLARIZATION; PULSES; STEADY-STATE CONDITIONS; TUBES

Citation Formats

Wang, Xiaojie, Liu, Fukun, Shan, Jiafang, Xu, Handong, Wu, Dajun, Li, Bo, Tang, Yunying, Zhang, Liyuan, Xu, Weiye, Hu, Huaichuan, Wang, Jiang, Yang, Yong, Xu, Li, Ma, Wendong, Feng, Jianqiang, Wei, Wei, and Hefei University of Technology, 230009, Hefei. Research on long pulse ECRH system of EAST in support of ITER. United States: N. p., 2015. Web. doi:10.1063/1.4936544.
Wang, Xiaojie, Liu, Fukun, Shan, Jiafang, Xu, Handong, Wu, Dajun, Li, Bo, Tang, Yunying, Zhang, Liyuan, Xu, Weiye, Hu, Huaichuan, Wang, Jiang, Yang, Yong, Xu, Li, Ma, Wendong, Feng, Jianqiang, Wei, Wei, & Hefei University of Technology, 230009, Hefei. Research on long pulse ECRH system of EAST in support of ITER. United States. https://doi.org/10.1063/1.4936544
Wang, Xiaojie, Liu, Fukun, Shan, Jiafang, Xu, Handong, Wu, Dajun, Li, Bo, Tang, Yunying, Zhang, Liyuan, Xu, Weiye, Hu, Huaichuan, Wang, Jiang, Yang, Yong, Xu, Li, Ma, Wendong, Feng, Jianqiang, Wei, Wei, and Hefei University of Technology, 230009, Hefei. 2015. "Research on long pulse ECRH system of EAST in support of ITER". United States. https://doi.org/10.1063/1.4936544.
@article{osti_22496230,
title = {Research on long pulse ECRH system of EAST in support of ITER},
author = {Wang, Xiaojie and Liu, Fukun and Shan, Jiafang and Xu, Handong and Wu, Dajun and Li, Bo and Tang, Yunying and Zhang, Liyuan and Xu, Weiye and Hu, Huaichuan and Wang, Jiang and Yang, Yong and Xu, Li and Ma, Wendong and Feng, Jianqiang and Wei, Wei and Hefei University of Technology, 230009, Hefei},
abstractNote = {Experimental Advanced Superconducting Tokamak (EAST), as a fully superconducting tokamak in China, aims to achieve high performance plasma under steady-state operation. To fulfill the physical objectives of EAST, a program of 4-MW long pulse electron cyclotron resonance heating and current drive (EC H&CD) system, which would offer greater flexibility for plasma shape and plasma stabilization has been launched on EAST since 2011. The system, composed of 4 gyrotrons with nominal 1MW output power and 1000s pulse length each, is designed with the feature of steerable power handling capabilities at 140 GHz, using second harmonic of the extraordinary mode(X2). The missions of the ECRH system are to provide plasma heating, current drive, plasma profile tailoring and control of magneto-hydrodynamic (MHD) instabilities. Presently, the first two 140-GHz 1-MW gyrotrons, provided by GYCOM and CPI, respectively, have been tested at long pulse operation. The tubes, the associated power supplies, cooling system, cryogenic plant, 2 transmission lines and an equatorial launcher are now installed at EAST. The power generated from each tube will be transmitted by an evacuated corrugated waveguide transmission line and injected into plasma from the low field side (radial port) through a front steering equatorial launcher. Considering the diverse applications of the EC system, the beam’s launch angles can be continuously varied with the optimized scanning range of over 30° in poloidal direction and ±25° in toroidal, as well as the polarization could be adjusted during the discharge by the orientations of a pair of polarizers in the transmission line to maintain the highest absorption for different operational scenarios. The commissioning of the first 2MW ECRH plant for EAST is under way. The design, R&D activities and recent progress of the long pulse 140-GHz ECRH system are presented in this paper. As the technological requirements for EAST ECRH have many similarities with ITER devices, the installation and experience of EAST ECRH system may provide valuable data for the ITER.},
doi = {10.1063/1.4936544},
url = {https://www.osti.gov/biblio/22496230}, 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}
}