Integrated Operating Scenario to Achieve 100-Second, High Electron Temperature Discharge on EAST
Stationary long pulse plasma of high electron temperature was produced on EAST for the first time through an integrated control of plasma shape, divertor heat flux, particle exhaust, wall conditioning, impurity management, and the coupling of multiple heating and current drive power. A discharge wit...
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Published in | Plasma science & technology Vol. 18; no. 5; pp. 457 - 459 |
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Main Author | |
Format | Journal Article |
Language | English |
Published |
01.05.2016
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Subjects | |
Online Access | Get full text |
ISSN | 1009-0630 |
DOI | 10.1088/1009-0630/18/5/01 |
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Summary: | Stationary long pulse plasma of high electron temperature was produced on EAST for the first time through an integrated control of plasma shape, divertor heat flux, particle exhaust, wall conditioning, impurity management, and the coupling of multiple heating and current drive power. A discharge with a lower single null divertor configuration was maintained for 103 s at a plasma current of 0.4 MA, q95 ≈7.0, a peak electron temperature of 〉4.5 keV, and a central density ne(0)-2.5×10^19 m^-3. The plasma current was nearly non-inductive (Vloop 〈0.05 V, poloidal beta - 0.9) driven by a combination of 0.6 MW lower hybrid wave at 2.45 GHz, 1.4 MW lower hybrid wave at 4.6 GHz, 0.5 MW electron cyclotron heating at 140 GHz, and 0.4 MW modulated neutral deuterium beam injected at 60 kV. This progress demonstrated strong synergy of electron cyclotron and lower hybrid electron heating, current drive, and energy confinement of stationary plasma on EAST. It further introduced an example of integrated "hybrid" operating scenario of interest to ITER and CFETR. |
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Bibliography: | QIAN Jinping, GONG Xianzu , WAN Baonian , LIU Fukun , WANG Mao , XU Handong , nv Chundong , WANG Liang , LI Erzhong , ZENG Long , TI Ang , SHEN Biao , LIN Shiyao , SHAO Linming, ZANG Qing, LIU Haiqing, ZHANG Bin , SUN Youwen , XU Guosheng , LIANG Yunfeng , XIAO Bingjia, HU Liqun , LI Jiangang ( Institute of Plasma Physics, Chinese Academy of Sciences, Hefei 230031, China) Stationary long pulse plasma of high electron temperature was produced on EAST for the first time through an integrated control of plasma shape, divertor heat flux, particle exhaust, wall conditioning, impurity management, and the coupling of multiple heating and current drive power. A discharge with a lower single null divertor configuration was maintained for 103 s at a plasma current of 0.4 MA, q95 ≈7.0, a peak electron temperature of 〉4.5 keV, and a central density ne(0)-2.5×10^19 m^-3. The plasma current was nearly non-inductive (Vloop 〈0.05 V, poloidal beta - 0.9) driven by a combination of 0.6 MW lower hybrid wave at 2.45 GHz, 1.4 MW lower hybrid wave at 4.6 GHz, 0.5 MW electron cyclotron heating at 140 GHz, and 0.4 MW modulated neutral deuterium beam injected at 60 kV. This progress demonstrated strong synergy of electron cyclotron and lower hybrid electron heating, current drive, and energy confinement of stationary plasma on EAST. It further introduced an example of integrated "hybrid" operating scenario of interest to ITER and CFETR. superconducting tokamak, high electron temperature, long pulse 34-1187/TL ObjectType-Article-1 SourceType-Scholarly Journals-1 ObjectType-Feature-2 content type line 23 |
ISSN: | 1009-0630 |
DOI: | 10.1088/1009-0630/18/5/01 |