Suppression mechanism of equilibrium magnetic islands in CFQS low-<inline-formula><tex-math id="Z-20231023161017">\begin{document}$\boldsymbol \beta$\end{document}</tex-math><alternatives><graphic xmlns:xlink="http://www.w3.org/1999/xlink" xlink:href="21-20230546_Z-20231023161017.jpg"/><graphic xmlns:xlink="http://www.w3.org/1999/xlink" xlink:href="21-20230546_Z-20231023161017.png"/></alternatives></inline-formula> plasma

姓名
邮箱
手机号码
标题
留言内容
验证码

Abstract

Magnetic island produced in toroidal magnetic confinement plasma has a three-dimensional helical structure because of the rotational transform, especially the equilibrium magnetic surface of the stellarator is three-dimensional helical structure. Thus, the formation and instability of the magnetic island of the Stellarator is a typical issue of the three-dimensional physics and is also one of the key topics of the physics research of the Stellarator. Magnetic islands and related tearing mode physics are major issues in stellarator. The non-inductively current drive, i.e. electron cyclotron current drive (ECCD) can be used as one of the approaches to adjusting the rotational transform, and hence, affecting the generation of magnetic islands. In this study, we use an additional toroidal magnetic field to generate m/ n= 5/2 magnetic islands in the low- βoperation on the Chinese First Quasi-axisymmetric Stellarator (CFQS) so that the influence of the bootstrap current is negligible. Then, we investigate the suppression mechanism of magnetic islands in low- βplasma by using the HINT code. It is found that in the case of the constant current, when the current direction is positive, with the increase of current, the width of island increases. When the direction of current is reversed, the island is suppressed when the current is larger than 6 kA. The main reason is that the rotational transform is away from ι/2π = 0.4 rational surface and the m/ n=5/2 magnetic island does not meet the resonance conditions. In the case of local current profile, the magnetic island width decreases as a result of the enhanced magnetic shear at ι/2π = 0.4 rational surface. Moreover, effects of the direction and the amplitude of the current on the suppression of magnetic islands are also discussed in more detail.

Keywords:

Authors and contacts

Corresponding author:Wang Xian-Qu,xianquwang@swjtu.edu.cn

Funds:Project supported by the National Key R&D Program of China (Grant Nos. 2022YFE03070000, 2022YFE03070001, 2019YFE03020002), the National Natural Science Foundation of China (Grant Nos. 11975188, U22A20262), and the Science and Technology Plan Project of Sichuan Province, China (Grant No. 2022JDJQ0036).

FullText HTML: translate this paragraph

References

[1]
[2]
[3]
[4]
[5]
[6]
[7]
[8]
[9]
[10]
[11]
[12]
[13]
[14]
[15]
[16]
[17]
[18]
[19]
[20]
[21]
[22]
[23]
[24]
[25]
[26]
[27]
[28]
[29]

Cited By

DownLoad: Full-Size Img PowerPoint

DownLoad: Full-Size Img PowerPoint

DownLoad: Full-Size Img PowerPoint

DownLoad: Full-Size Img PowerPoint

DownLoad: Full-Size Img PowerPoint

DownLoad: Full-Size Img PowerPoint

DownLoad: Full-Size Img PowerPoint

DownLoad: Full-Size Img PowerPoint

DownLoad: Full-Size Img PowerPoint

DownLoad: Full-Size Img PowerPoint

DownLoad: Full-Size Img PowerPoint

[1]
[2]
[3]
[4]
[5]
[6]
[7]
[8]
[9]
[10]
[11]
[12]
[13]
[14]
[15]
[16]
[17]
[18]
[19]
[20]
[21]
[22]
[23]
[24]
[25]
[26]
[27]
[28]
[29]

[1]	Zhang Han-Mou, Xiao Fa-Jun, Zhao Jian-Lin.Unidirectional scattering of Si ring-Au split ring nanoantenna excited by tightly focused azimuthally polarized beam. Acta Physica Sinica, 2022, 71(13): 135201.doi:10.7498/aps.71.20212212
[2]	Li Chun-Yu, Hao Guang-Zhou, Liu Yue-Qiang, Wang Lian, Liu Yi-Hui-Zi.Influence of toroidal rotation on plasma response to external RMP fields in tokamak. Acta Physica Sinica, 2022, 71(7): 075202.doi:10.7498/aps.71.20211975
[3]	Huang Jie, Li Mo-Shan, Qin Cheng, Wang Xian-Qu.Simulation of ion temperature gradient mode in Chinese First Quasi-axisymmetric Stellarator. Acta Physica Sinica, 2022, 71(18): 185202.doi:10.7498/aps.71.20220729
[4]	Yang Jin, Chen Jun, Wang Fu-Di, Li Ying-Ying, Lyu Bo, Xiang Dong, Yin Xiang-Hui, Zhang Hong-Ming, Fu Jia, Liu Hai-Qing, Zang Qing, Chu Yu-Qi, Liu Jian-Wen, Wang Xun-Yu, Bin Bin, He Liang, Wan Shun-Kuan, Gong Xue-Yu, Ye Min-You.Experimental investigation of lower hybrid current drive induced plasma rotation on the experimental advanced superconducting tokamak. Acta Physica Sinica, 2020, 69(5): 055201.doi:10.7498/aps.69.20191716
[5]	Chen Jian-Ling, Wang Hui, Jia Huan-Yu, Ma Zi-Wei, Li Yong-Hong, Tan Jun.Conductivity of neutron star crust under superhigh magnetic fields and Ohmic decay of toroidal magnetic field of magnetar. Acta Physica Sinica, 2019, 68(18): 180401.doi:10.7498/aps.68.20190760
[6]	Shi Liang-Ma, Zhou Ming-Jian, Zhang Qing-Qing, Zhang Hong-Bin.Vortex pattern in three-dimensional mesoscopic superconducting rings. Acta Physica Sinica, 2016, 65(4): 047501.doi:10.7498/aps.65.047501
[7]	Li Dan, Zhang Bao-Long, Kwok Hoising.Three-dimensional optical modeling of vertical alignment mode color filter liquid-crystal-on-silicon microdisplays. Acta Physica Sinica, 2015, 64(14): 140701.doi:10.7498/aps.64.140701
[8]	Luo Zhi-Hua, Liang Guo-Dong.Non-classical eigen state and the persistent current in one-dimensional mesoscopic ring with the electron-two-phonon interaction. Acta Physica Sinica, 2012, 61(5): 057303.doi:10.7498/aps.61.057303
[9]	Liang Fang-Ying, Li Han-Ming, Li Ying-Jun.Study of current in superconductive rings. Acta Physica Sinica, 2006, 55(2): 830-833.doi:10.7498/aps.55.830
[10]	Li Yin-Feng, Yin Shi-Zhong, Vázquez M..Circular magnetization processes in amorphous and nanocrystalline soft magnetic wires. Acta Physica Sinica, 2005, 54(7): 3391-3396.doi:10.7498/aps.54.3391
[11]	HU JIAN-PING, HU KE-SONG, CHEN YU-TAO.PULSE-CURRENT LINEARLY POLARIZED WIGGLER WITH LOOPED WIRE. Acta Physica Sinica, 1996, 45(7): 1130-1137.doi:10.7498/aps.45.1130
[12]	MENG YUE-DONG, GAO XIANG, FAN SHU-PING, LI JIAN-GANG, LUO JIA-RONG, TONG XING-DE, ZHANG WEI, HAN YU-QIN, GONG XIAN-ZU, JIANG JIA-GUANG, YIN FU-XIAN, ZENG LEI, LING BI-LI, YIN FEI, DING LIAN-CHENG, ZHA.IMPROVED CONFINEMENT PHASE IN RAMPING UP PLASMA CURRENT BY TOROIDAL FIELD. Acta Physica Sinica, 1994, 43(9): 1486-1494.doi:10.7498/aps.43.1486
[13]	XU KUN-MING, SHEN YA-FEI, YAO XI-XIAN.THE GEOMETRY SIZE EFFECTS OF THE QUASI-FLUXON OF EXCITATION IN THE CIRCULAR SYMMETRIC ANNULAR JOSEPHSON JUNCTION. Acta Physica Sinica, 1989, 38(6): 947-955.doi:10.7498/aps.38.947
[14]	XU KUN-MING, SHEN YA-FEI, YAO XI-XIAN.THE MAGNETIC FIELD DEPENDENCE OF THE QUASI-FLU- XON OF EXCITATION IN THE CIRCULAR SYMMETRIC ANNULAR JOSEPHSON JUNCTION. Acta Physica Sinica, 1989, 38(6): 938-946.doi:10.7498/aps.38.938
[15]	WANG WEI, YAO XI-XIAN.STATIC CHARACTERISTICS OF CIRCULAR SYMMETRIC ANNULAR JOSEPHSON JUNCTION (Ⅰ)——THE QUASI-DIFFRACTION CHARACTERISTIC AND THE SELF-FIELD EFFECTS. Acta Physica Sinica, 1988, 37(5): 705-713.doi:10.7498/aps.37.705
[16]	CHEN GENG-HUA, ZHAO ZHONG-XIAN.TRANSMISSION PROBABILITY AND RESONANCES IN NON-SYMMETRIC ONE-DIMENSIONAL MICROSCOPIC NORMAL METAL RING. Acta Physica Sinica, 1987, 36(6): 801-806.doi:10.7498/aps.36.801
[17]	ZHANG YU-HENG, CAO XIAO-WEN.A PROPOSAL OF FREEZING TOROIDAL MAGNETIC FIELD WITH THE SECTIONS OF SUPERCONDUCTING HOLLOWED CYLLINDER IN TOKAMAK APPARATUS. Acta Physica Sinica, 1981, 30(3): 325-332.doi:10.7498/aps.30.325
[18]	SHAO MAO-LIANG, MA TENG-CAI.EQUILIBRIUM THEORY AND ADIABATIC COMPRESSION THEORY OF TOKAMAKS WITH AN ELLIPTIC CROSS SECTION WITH SOME TRIANGULAR DEFORMATION. Acta Physica Sinica, 1981, 30(4): 487-496.doi:10.7498/aps.30.487
[19]	YU GUO-YANG, CHEN JUN-BENG, HUO YU-PING.MAGNETIC FIELD DESIGN FOR A LARGE TOKAMAK. Acta Physica Sinica, 1979, 28(5): 114-123.doi:10.7498/aps.28.114
[20]	HUO YU-PING.THE LOCAL STABILITY CRITERIA OF THE TOKAMAK AND THE EFFECT OF THE MULTIPOLE FIELD. Acta Physica Sinica, 1976, 25(5): 399-408.doi:10.7498/aps.25.399

Catalog

Vol. 72, Issue 21 - 2023-11-05

Metrics

Abstract views:2453
PDF Downloads:69
Cited By:0

Search

Article

留言板