THE DECISIVE ROLE OF m= 1 AND 2 PERTURBATIONS IN DENSITY LIMIT DISRUPTIONS ON TEXTOR

doi:10.1088/1004-423X/5/1/008

Abstract

Abstract The behavior of magnetohydrodynamic phenomena associated with disruptions of ohmically heated density limit discharges (q_a=3.9) in the TEXTOR tokamak has been investigated in detail. A minor disruption is demonstrated to be only due to an m = 2 mode instability, possibly due to the magnetic reconnection of an m=2 island. When the m = 2 mode oscillations cease, the internal m = 1 kink mode instability is drastically enhanced at once, twisting the plasma core considerably. If the twisting is too strong, the twisted plasma core is inevitably displaced to the outside and brings cold plasma to the central region, leading to the energy quench at a major disruption.

Received: 04 November 1994
Accepted manuscript online:

PACS:	52.55.Fa	(Tokamaks, spherical tokamaks)
	52.30.Cv	(Magnetohydrodynamics (including electron magnetohydrodynamics))
	52.50.Nr	(Plasma heating by DC fields; ohmic heating, arcs)
	52.35.Vd	(Magnetic reconnection)
	52.35.Py	(Macroinstabilities (hydromagnetic, e.g., kink, fire-hose, mirror, ballooning, tearing, trapped-particle, flute, Rayleigh-Taylor, etc.))
	28.52.Av	(Theory, design, and computerized simulation)

Cite this article:

KUANG GUANG-LI (匡光力), G.WAIDMANN THE DECISIVE ROLE OF m= 1 AND 2 PERTURBATIONS IN DENSITY LIMIT DISRUPTIONS ON TEXTOR 1996 Acta Physica Sinica (Overseas Edition) 5 58

[1]	Upgrade of the magnetic diagnostic system for restart of HT-6M operation Li-Xing Chen(陈力行), Biao Shen(沈飊), Da-Long Chen(陈大龙), Zheng-Ping Luo(罗正平),Zu-Chao Zhang(张祖超), Ying Chen(陈颖), Yong Wang(王勇), and Jin-Ping Qian(钱金平). Chin. Phys. B, 2022, 31(12): 125203.
[2]	Evolution of the high-field-side radiation belts during the neon seeding plasma discharge in EAST tokamak Ji-Chan Xu(许吉禅), Liang Wang(王亮), Guo-Sheng Xu(徐国盛), Yan-Min Duan(段艳敏), Ling-Yi Meng(孟令义), Ke-Dong Li(李克栋), Fang Ding(丁芳), Rui-Rong Liang(梁瑞荣), Jian-Bin Liu(刘建斌), and EAST Team. Chin. Phys. B, 2022, 31(10): 105203.
[3]	Parametric decay instabilities of lower hybrid waves on CFETR Taotao Zhou(周涛涛), Nong Xiang(项农), Chunyun Gan(甘春芸), Guozhang Jia(贾国章), and Jiale Chen(陈佳乐). Chin. Phys. B, 2022, 31(9): 095201.
[4]	Numerical simulation of fueling pellet ablation and transport in the EAST H-mode discharge Wan-Ting Chen(陈婉婷), Ji-Zhong Sun(孙继忠), Fang Gao(高放), Lei Peng(彭磊), and De-Zhen Wang(王德真). Chin. Phys. B, 2022, 31(7): 075204.
[5]	Experimental investigation on divertor tungsten sputtering with neon seeding in ELMy H-mode plasma in EAST tokamak Dawei Ye(叶大为), Fang Ding(丁芳), Kedong Li(李克栋), Zhenhua Hu(胡振华), Ling Zhang(张凌), Xiahua Chen(陈夏华), Qing Zhang(张青), Pingan Zhao(赵平安), Tao He(贺涛), Lingyi Meng(孟令义), Kaixuan Ye(叶凯萱), Fubin Zhong(钟富彬), Yanmin Duan(段艳敏), Rui Ding(丁锐), Liang Wang(王亮), Guosheng Xu(徐国盛), Guangnan Luo(罗广南), and EAST team. Chin. Phys. B, 2022, 31(6): 065201.
[6]	The intermittent excitation of geodesic acoustic mode by resonant Instanton of electron drift wave envelope in L-mode discharge near tokamak edge Zhao-Yang Liu(刘朝阳), Yang-Zhong Zhang(章扬忠), Swadesh Mitter Mahajan, A-Di Liu(刘阿娣), Chu Zhou(周楚), and Tao Xie(谢涛). Chin. Phys. B, 2022, 31(4): 045202.
[7]	Neoclassical tearing mode stabilization by electron cyclotron current drive for HL-2M tokamak Jing-Chun Li(李景春), Jia-Qi Dong(董家齐), Xiao-Quan Ji(季小全), and You-Jun Hu(胡友俊). Chin. Phys. B, 2021, 30(7): 075203.
[8]	Tests of the real-time vertical growth rate calculation on EAST Na-Na Bao(鲍娜娜), Yao Huang(黄耀), Jayson Barr, Zheng-Ping Luo(罗正平), Yue-Hang Wang(汪悦航), Shu-Liang Chen(陈树亮), Bing-Jia Xiao(肖炳甲), David Humphreys. Chin. Phys. B, 2020, 29(6): 065204.
[9]	Nonlinear simulation of multiple toroidal Alfvén eigenmodes in tokamak plasmas Xiao-Long Zhu(朱霄龙), Feng Wang(王丰), Zheng-Xiong Wang(王正汹). Chin. Phys. B, 2020, 29(2): 025201.
[10]	Discharge simulation and volt-second consumption analysis during ramp-up on the CFETR tokamak Cheng-Yue Liu(刘成岳), Bin Wu(吴斌), Jin-Ping Qian(钱金平), Guo-Qiang Li(李国强), Ya-Wei Hou(侯雅巍), Wei Wei(韦维), Mei-Xia Chen(陈美霞), Ming-Zhun Lei(雷明准), Yong Guo(郭勇). Chin. Phys. B, 2020, 29(2): 025202.
[11]	Estimation of plasma equilibrium parameters via a neural network approach Zi-Jian Zhu(朱子健), Yong Guo(郭勇), Fei Yang(杨飞), Bing-Jia Xiao(肖炳甲), Jian-Gang Li(李建刚). Chin. Phys. B, 2019, 28(12): 125204.
[12]	Effect of edge transport barrier on required toroidal field for ignition of elongated tokamak Cui-Kun Yang(杨翠坤), Ming-Sheng Chu(朱名盛), Wen-Feng Guo(郭文峰). Chin. Phys. B, 2019, 28(4): 045202.
[13]	Numerical study of influence of J×B force on melt layer under conditions relevant to ITER ELMs Yan Huang(黄艳), Ji-Zhong Sun(孙继忠), Juan Cai(蔡娟), Zhen-Yue Sun(孙振月), Chao-Feng Sang(桑超峰), De-Zhen Wang(王德真). Chin. Phys. B, 2019, 28(4): 045201.
[14]	Investigation on the drives of the poloidal flow in the ohmic and biased electrode experiments Yi Yu(余羿), Tao Lan(兰涛), Min Xu(许敏), Yizhi Wen(闻一之). Chin. Phys. B, 2019, 28(3): 035202.
[15]	Radiative divertor behavior and physics in Ar seeded plasma on EAST Jingbo Chen(陈竞博), Yanmin Duan(段艳敏), Zhongshi Yang(杨钟时), Liang Wang(王亮), Kai Wu(吴凯), Kedong Li(李克栋), Fang Ding(丁芳), Hongmin Mao(毛红敏), Jichan Xu(许吉禅), Wei Gao(高伟), Ling Zhang(张凌), Jinhua Wu(吴金华), Guang-Nan Luo(罗广南), EAST Team. Chin. Phys. B, 2017, 26(9): 095205.

No Suggested Reading articles found!

Viewed

Full text

Abstract

Cited

Metrics
Related Articles

THE DECISIVE ROLE OF m= 1 AND 2 PERTURBATIONS IN DENSITY LIMIT DISRUPTIONS ON TEXTOR

Cite this article:

Online attention