PHYSICS OF GASES, PLASMAS, AND ELECTRIC DISCHARGES |
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Observation and analysis of halo current in EAST |
Chen Da-Longa, Shen Biaoa, Qian Jin-Pinga, Sun You-Wena, Liu Guang-Juna, Shi Tong-Huia, Zhuang Hui-Donga, Xiao Bing-Jiaa b |
a Institute of Plasma Physics, Chinese Academy of Sciences, Hefei 230031, China; b School of Nuclear Science and Technology, University of Science and Technology of China, Hefei 230031, China |
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Abstract Plasma in a typically elongated cross-section tokamak (for example, EAST) is inherently unstable against vertical displacement. When plasma loses the vertical position control, it moves downward or upward, leading to disruption, and a large halo current is generated helically in EAST typically in the scrape-off layer. When flowing into the vacuum vessel through in-vessel components, the halo current will give rise to a large J×B force acting on the vessel and the in-vessel components. In EAST VDE experiment, part of the eddy current is measured in halo sensors, due to the large loop voltage. Primary experimental data demonstrate that the halo current first lands on the outer plate and then flows clockwise, and the analysis of the information indicates that the maximum halo current estimated in EAST is about 0.4 times the plasma current and the maximum value of TPF×Ih/IP0 is 0.65, furthermore Ih/ Ip0 and TPF×Ih/Ip0 tend to increase with the increase of Ip0. The test of the strong gas injection system shows good success in increasing the radiated power, which may be effective in reducing the halo current.
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Received: 15 October 2013
Revised: 11 December 2013
Published: 15 June 2014
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PACS:
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52.55.Fa
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(Tokamaks, spherical tokamaks)
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52.70.Ds
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(Electric and magnetic measurements)
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Fund: Project supported by the National Magnetic Confinement Fusion Science Program of China (Grant Nos. 2014GB103000 and 2013GB102000) and the National Natural Science Foundation of China (Grant No. 11205199). |
Corresponding Authors:
Qian Jin-Ping
E-mail: jpqian@ipp.ac.cn
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Cite this article:
Chen Da-Long, Shen Biao, Qian Jin-Ping, Sun You-Wen, Liu Guang-Jun, Shi Tong-Hui, Zhuang Hui-Dong, Xiao Bing-Jia Observation and analysis of halo current in EAST 2014 Chin. Phys. B 23 065205
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[1] |
Granetz R S, Hutuhinson I H and Sorci J 1996 Nucl. Fusion 36 545
|
[2] |
Mirnov S, Wesley J, Fujisawa N, Gribov Yu, Gruber O, Hender T, Ivanov N, Jardin S, Lister J, Perkins F, Rosenbluth M, Sautho N, Taylor T, Tokuda S, Yamazaki K, Yoshino R, Bondeson A, Conner J, Fredrickson E, Gates D, Granetz R, La Haye R, Neuhauser J and Porcelli F 1999 ITER Physics Expert Group on Disruption, Plasma Control, MHD and ITER Physics Basis Editors, Nucl. Fusion 39 2336
|
[3] |
Neyatani Y, Yoshino R, Nakamura Y and Sakurai S 1999 Nucl. Fusion 39 559
|
[4] |
Granetz R S and Hutchinson I H 1997 Proceedings of the 16th IAEA Fusion Energy Conference, 1996, October, Montreal, Canada (Vienna: The International Atomic Energy Agency)
|
[5] |
Riccardo V, Hender T C and Lomas P J 2004 Plasma Phys. Control Fusion 46 925
|
[6] |
Gerhardt S P 2012 Nucl. Fusion 52 063005
|
[7] |
Qian J P, Wan B N and Shen B 2009 Chin. Phys. B 18 1172
|
[8] |
Chen D L and Shen B 2013 Nucl. Fusion Plasma Phys. 33 66 (in Chinese)
|
[9] |
Qian J P, Wan B N and Shen B 2009 Chin. Phys. B 18 2432
|
[10] |
Liu G J, Wan B N, Sun Y W, Xiao B J and Wang Y 2013 Rev. Sci. Instrum. 84 073502
|
[11] |
Xu X Y, Wang J, Wan B N and Gao X 2009 Chin. Phys. B 18 1153
|
[12] |
Humphreys D A 1999 Physics of Plasmas 6 2742
|
[13] |
Pautasso G and Giannone L 2011 Nucl. Fusion 51 043010
|
[14] |
Wu B, Wang J F and Li J B 2011 Fusion Eng. Des. 86 947
|
[15] |
Whyte D G, Jernigan T C and Humphreys D A 2002 Phys. Rev. Lett. 89 055001
|
[16] |
Finken K H, Mank G and Kramer-Flecken A 2001 Nucl. Fusion 41 1651
|
[17] |
Zhuang H D and Zhang X D 2013 Plasma Science and Technology 15 746
|
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