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Study of Plasma MHD Equilibrium in HL-2A Tokamak

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Plasma Science and Technology 2006年第4期8卷 397-401页

作者：何宏达张锦华董家齐李强 Southwestern Institute of Physics Chengdu 610041China

EFIT（Equilibrium Fitting） code is successfully transplanted for HL-2A tokamak parameters. The evolution of the equilibrium configurations for shot 2898 is simulated. It is shown that the discharge starts with a limiter configuration and develops into a divertor configuration gradually after t = 200 ms. The latter lasts until the end of the discharge at t = 900 ms. The evolution of the major plasma shape parameters such as the boundary magnetic fluxes, the positions of the x-point and magnetic axis, and the minor radii obtained are calculated and compared with the experimental results. The agreement between the simulation and experiments are shown to be reasonable. The possibility for discharge quality improvement is discussed.

关键词： simulations equilibrium HL-2A tokamak

Magnetic Field Gradient and Curvature-Driven Drift Modes in Toroidal Plasmas

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Chinese Physics Letters 2004年第8期21卷 1575-1577页

作者：王爱科 H.Sanuki 董家齐 F.Zonca K.Itoh SouthwesternInstituteofPhysics POBox432Chengdu610041 NationalInstituteforFusionScience TokiGifu509-5292Japan ENEAC.R.Frascati C.P.6500044FrascatiRomeItaly

A new kind of instability driven by the magnetic field gradient and curvature (MFGC) in toroidal plasmas is presented. It is found that the MFGC drift modes possess finite growth rates even if the plasma pressure gradient vanishes. In addition, the effects of plasma pressure gradient and safety factor on the MFGC modes have been analysed numerically.

关键词： Pressure gradient

Dynamics of Secondary Large-Scale Structures in ETG Turbulence Simulations

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Plasma Science and Technology 2006年第1期8卷 110-113页

作者：李继全 Y.KISHIMOTO 董家齐 N.MIYATO T.MATSUMOTO Southwestern Institute of Physics and SWIP-DUT Joint Lab for Fusion Plasma PhysicsChengdu 610041China Department of Fundamental Energy Kyoto University611-0011 GokashoUjiJapan Naka Fusion Research EstablishmentJAERINakaIbaraki 311-0193Japan Naka Fusion Research Establishment JAERINakaIbaraki 311-0193Japan

The dynamics of secondary large-scale structures in electron-temperature-gradient （ETG） turbulence is investigated based on gyrofluid simulations in sheared slab geometry. It is found that structural bifurcation to zonal flow dominated or streamer-like states depends on the spectral anisotropy of turbulent ETG fluctuation, which is governed by the magnetic shear. The turbulent electron transport is suppressed by enhanced zonal flows. However, it is still low even if the streamer is formed in ETG turbulence with strong shears. It is shown that the low transport may be related to the secondary excitation of poloidal long-wavelength mode due to the beat wave of the most unstable components or a modulation instability. This large-scale structure with a low frequency and a long wavelength may saturate, or at least contribute to the saturation of ETG fluctuations through a poloidal mode coupling. The result suggests a low fluctuation level in ETG turbulence.

关键词： large-scale structures ETG turbulence gyrofluid simulation tokamak

Study of LHCD in HL-2A Non-Circular Cross Section Tokamak

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Plasma Science and Technology 2007年第1期9卷 19-22页

作者：焦一鸣董家齐高庆弟王爱科刘永 Southwestern Institute of Physics Chengdu 610041China

Using the Grad-Shafranov equation, the magnetic configuration is obtained. With this configuration, Brambilla＇s ray tracing theory has been used to study the propagation of LH waves. The qualitative study of the feasibility of LHCD in the non-circular cross section tokamak HL-2A is made. The optimized current drive method is discussed.

关键词： non-circle cross section D shape magnetic configuration ray tracing current drive

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激流歌

山花 1964年第8期 7-16页

作者：高成华罗绍书董家齐报告文学创作组报告文学创作组

一一九六三年入春以后,赤水河上游,毕节县燕子口区先进公社地名五里桥的五一大队,几十个日子没得着透雨。看看芒种过了,新出土的包谷苗长不起来,上了节的稻秧栽不下去。人们一边抗旱一边看天:白天炎阳似火,空气热得烫人;入夜星斗满天,... 详细信息

一一九六三年入春以后,赤水河上游,毕节县燕子口区先进公社地名五里桥的五一大队,几十个日子没得着透雨。看看芒种过了,新出土的包谷苗长不起来,上了节的稻秧栽不下去。人们一边抗旱一边看天:白天炎阳似火,空气热得烫人;入夜星斗满天,一丝云影也没有……所有的迹象都说明这是个大旱年成。五一大队的地面,是条狭长十里的山(土曹)子。东南高,愈往西北愈低,一条小河深陷谷底。小河的主干叫麻塘河。上半段是干的,只有山洪来时才有水。中间有股地下水由沙石间冒出来,地名龙滩。它的长流水来自另外一条支流。那支流叫苗寨河,源流倒高,流到这里却也一样陷入沟底。就由于它们深陷沟底,能看不能用,大旱来时,常常

关键词：五里桥毕节县生产队长燕子口云影九六修来你那出点一团团

MHD Equilibrium Configuration Reconstructions for HL-2A Tokamak

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Plasma Science and Technology 2011年第4期13卷 424-430页

作者：何志雄董家齐何宏达蒋海滨高喆张锦华 Southwestern Institute of Physics Department of Engineering Physics Tsinghua University Institute for Fusion Theory and Simulation Zhejiang University Department of Engineering Physics Tsinghua University

The EFIT （Equilibrium Fitting） code is modified for the equilibrium configuration reconstruction in HL-2A. Signals from Langmuir probe （LP） at the divertor target plates are employed in the reconstruction of divertor configurations. The results show that discharge #2895 starts with a limiter configuration and develops gradually into a divertor configuration after t = 230 ms. This transition process is clearly demonstrated by the LP signals for the reconstruction. The profiles of plasma parameters such as safety factor q, pressure and current density as well as the evolution of major shape parameters of plasma, such as the boundary magnetic fluxes, the positions of both x-point and magnetic axis, are calculated from the reconstructed configurations. The possibility to apply the method to the swing of strike point on the target plate is discussed.

关键词： equilibrium reconstruction MHD equilibrium LP signals HL-2A tokamak

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科技到苗家

山花 1959年第11期 34-37页

作者：韦小平董家齐雷似烟曾宪坤

打倒了土皇帝小罗山,又斗垮了我们寨上的恶霸王景文,一家分得了一分田地——说起笑人,那时候我们好多苗家农民,就认为翻身“透了顶”了。我是恰在这些时侯入党的。党给我说,农民要组织起来走互助合作的道路;同时要进行技术改革,改变这... 详细信息

打倒了土皇帝小罗山,又斗垮了我们寨上的恶霸王景文,一家分得了一分田地——说起笑人,那时候我们好多苗家农民,就认为翻身“透了顶”了。我是恰在这些时侯入党的。党给我说,农民要组织起来走互助合作的道路;同时要进行技术改革,改变这地方那些落后了若干年代的耕作方法。

关键词：耕作技术

Special issue on instabilities and nonlinear phenomena in plasmas--in memory of professor Changxuan Yu

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Plasma Science and Technology 2018年第9期20卷 1-2页

作者：董家齐王晓钢陈骝 Southwestern Institute of Physics Chengdu 610041People's Republic of China Laboratory for SpaceEnvironment and PhysicalSciences Harbin Institute ofTechnology Harbin 150001People's Republic of China Institute for Fusion Theory andSimulation and Department ofPhysics Zhejiang UniversityHangzhou 310027 People'sRepublic of China Department of Physics andAstronomy University of California Irvine CA 92697-4575 United States of America

An academician of Chinese Academy of Sciences （CAS）,Professor Changxuan Yu,a long-time professor of plasma physics at the University of Science and Technology of China （USTC）,Hefei,China,passed away in Hefei on May 23,2017.Professor Yu was born on July 7,1941,in Java Island,Indonesia,and then moved back to China in 1948 with his parents.He finished his high schooleducation in Xiamen City, Fujian Province in 1959, and was admi-tted to USTC, then located in Beijing. After graduating with excellence from USTC, which had been relocated to Hefei, Anhui Province, he stayed on as a faculty until his passing away. During this period he visited the University of California, Los Angeles, USA, from 1980 to 1982, 1989 to 1991, and 2000 to 2001 for research colla- boration. He was promoted to Assistant Professor, Associate Professor, and full Professor in 1979, 1985 and 1992, respectively, and elected as a CAS Academician in 2007 based on his outstanding achievements in plasma physics and nuclear fusion science, and great contributions to education and development of these fields in China.

关键词： in memory of professor Changxuan Yu

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一类复本征方程的数值解

科学技术与工程 2003年第2期3卷 121-123页

作者：龙永兴董家齐李继全牟宗泽核工业西南物理研究院成都610041

介绍了用不变嵌入法求解一类复本征方程的数值方法,编制了求解CODE,适用于粒子温度梯度(ITG或η_i)驱动不稳定性研究的数值模拟。两个实例计算表明,数值结果与理论分析完全吻合,数值求解CODE是非常有效的。

关键词：复本征值不变嵌入法数值模拟