Toroidal rotation braking induced by n=4 RMP in EAST

doi:10.16568/j.0254-6086.202004002

NUCLEAR FUSION AND PLASMA PHYSICS ›› 2020, Vol. 40 ›› Issue (4): 294-299.DOI: 10.16568/j.0254-6086.202004002

• Plasma Physics • Previous Articles Next Articles

Toroidal rotation braking induced by n=4 RMP in EAST

LI Xin-yu1, 2, SUN You-wen1, ZANG Qing1, LI Ying-ying1

(1. Institute of Plasma Physics, Chinese Academy of Sciences, Hefei 230031; 2. University of Science and Technology of China, Hefei 230027)

Received:2019-04-17 Revised:2020-04-15 Online:2020-12-15 Published:2021-06-03
Supported by:

EAST中n=4共振磁扰动下等离子体的环向旋转制动

李心宇1, 2，孙有文*1，臧庆1，李颖颖1

(1. 中国科学院等离子体物理研究所，合肥 230031；2. 中国科学技术大学研究生院科学岛分院，合肥 230027)

作者简介:李心宇(1993-)，男，广东茂名人，硕士研究生，从事磁场扰动下的等离子体旋转制动与三维平衡下的新经典输运研究。
基金资助:
国家重点研发计划(2017YFE0301100)；国家自然科学基金(11875292，11475224)

Abstract

Abstract: An obvious toroidal plasma rotation braking effect was observed during the application of n=4 resonant magnetic perturbation (RMP) in EAST, which shows a global profile and a peak located near the plasma center. Neoclassical toroidal viscosity (NTV) theory is one of an effective explanation in magnetic braking. The variation of toroidal angular velocity reproduced with neoclassical toroidal viscosity (NTV) torque shows good qualitative agreement with the measured rotation variation profile in most radial regions, and the difference is 1~2 times.

Key words: RMP, Rotation braking, Magnetic braking effect, Momentum transport, NTV

摘要： 在EAST中n=4的共振磁扰动下观察到明显的等离子体旋转制动效应，其分布具有全局性，且峰值靠近等离子体中心。利用模拟得到的新经典环向粘滞(NTV)力矩来反演等离子体环向角速度的变化，结果表明在大部分径向区域与实验测量的速度变化符合得较好，量值上相差约1~2倍。

关键词: 共振磁扰动, 旋转制动, 磁制动效应, 动量输运, 新经典粘滞

CLC Number:

O532+.11

LI Xin-yu1, 2, SUN You-wen1, ZANG Qing1, LI Ying-ying1. Toroidal rotation braking induced by n=4 RMP in EAST[J]. NUCLEAR FUSION AND PLASMA PHYSICS, 2020, 40(4): 294-299.

李心宇1, 2，孙有文*1，臧庆1，李颖颖1. EAST中n=4共振磁扰动下等离子体的环向旋转制动[J]. 核聚变与等离子体物理, 2020, 40(4): 294-299.

References

[1] Zohm H. Edge localized modes (ELMs) [J]. Plasma Phys. Contr. Fusion, 1999, 38(38): 105.

[2] Evans T E, Moyer R A, Thomas P R, et al. Suppression of large edge-localized modes in high-confinement DIII-D plasmas with a stochastic magnetic boundary [J]. Phys. Rev. Lett., 2004, 92: 235003.

[3] Liang Y F, Koslowski H R, Thomas P R, et al. Active control of Type-I edge localized modes on JET [J]. Phys. Rev. Lett., 2007, 98(26): 733-739.

[4] Kirk A, Nardon E, Akers R, et al. Resonant magnetic perturbation experiments on MAST using external and internal coils for ELM control [J]. Nucl. Fusion, 2010, 50(3): 034008.

[5] Jeon Y M, Park J K, Yoon S W, et al. Suppression of edge localized modes in high-confinement KSTAR plasmas by non-axisymmetric magnetic perturbations [J]. Phys. Rev. Lett., 2012, 109(3): 035004-280.

[6] Sun Y W, LiangY F, Liu Y Q, et al. Nonlinear transition from mitigation to suppression of the edge localized mode with resonant magnetic perturbations in the EAST tokamak [J]. Phys. Rev. Lett., 2016, 117(11): 115001.

[7] Buttery R J, La Haye R J, Gohil P, et al. The influence of rotation on the beta{N} threshold for the 2/1 neoclassical tearing mode in DIII-D [J]. Phys. Plasmas, 2008, 15(5): 614-60.

[8] Shaing K C. Magnetohydrodynamic-activity-induced toroidal momentum dissipation in collisionless regimes in tokamaks [J]. Phys. Plasmas, 2003, 10(5): 1443.

[9] Zhu W, Sabbagh S A, Bell R E, et al. Observation of plasma toroidal-momentum dissipation by neoclassical toroidal viscosity [J]. Phys. Rev. Lett., 2006, 96(22): 225002.

[10] Sun Y W, Liang Y F, Koslowski H R, et al. Toroidal rotation braking with n=1 magnetic perturbation field on JET [J]. Plasma Phys. Contr. Fusion, 2010, 52(10): 105007.

[11] Sun Y W, Liang Y F, Koslowski H R, et al. Non-resonant magnetic braking on JET and TEXTOR [J]. Nucl. Fusion, 2012, 52: 083007.

[12] Logan N C, Park J K, Paz-Soldan C, et al. Dependence of neoclassical toroidal viscosity on the poloidal spectrum of applied nonaxisymmetric fields [J]. Nucl. Fusion, 2016, 56(3): 036008.

[13] Park J K, Jeon Y M, Menard J E, et al. Rotational resonance of nonaxisymmetric magnetic braking in the KSTAR tokamak [J]. Phys. Rev. Lett., 2013, 111(9): 095002.

[14] Frassinetti L, Sun Y W, Fridström R, et al. Braking due to non-resonant magnetic perturbations and comparison with neoclassical toroidal viscosity torque in EXTRAP T2R [J]. Nucl. Fusion, 2015, 55(11): 112003.

[15] Li X Y, Sun Y W, Wang H H, et al. Rotation braking with n=1 non-axisymmetric magnetic perturbation in the EAST tokamak [J]. Phys. Plasmas, 2019, 26(5): 052512.

[16] Buttery R J, Boozer A H, Liu Y Q, et al. The limits and challenges of error field correction for ITER [J]. Phys. Plasmas, 2012, 19(5): 056111.

[17] Sun Y W, Li X Y, He K Y, et al. Unified modeling of both resonant and non-resonant neoclassical transport under non-axisymmetric magnetic perturbations in tokamaks [J]. Phys. Plasmas, 2019, 26: 072504.

[18] Sun Y W, Jia M, Zang Q, et al. Edge localized mode control using n=1 resonant magnetic perturbation in the EAST tokamak [J]. Nucl. Fusion, 2017, 57(3): 036007.

[19] Sun Y W, Liang Y F, Shaing K C, et al. Neoclassical toroidal plasma viscosity torque in collisionless regimes in Tokamaks [J]. Phys. Rev. Lett., 2010, 105(14): 145002.

[20] Sun Y W, Liang Y F, Shaing K C, et al. Modelling of the neoclassical toroidal plasma viscosity torque in tokamaks [J]. Nucl. Fusion, 2011, 51(51): 053015.

[21] Scott S D, Diamond P H, Fonck R J, et al. Local measurements of correlated momentum and heat transport in the TFTR tokamak [J]. Phys. Rev. Lett., 1990, 64(5): 531-534.

[22] Lazzaro E, Buttery R J, Hender T C, et al. Error field locked modes thresholds in rotating plasmas, anomalous braking and spin-up [J]. Phys. Plasmas, 2002, 9: 3906.

Toroidal rotation braking induced by n=4 RMP in EAST

EAST中n=4共振磁扰动下等离子体的环向旋转制动

PDF

Knowledge

Abstract

Cite this article

share this article

References

Related Articles 7

Recommended Articles

Metrics

[1]	SONG Qiang, YANG Jin-hong, GUI Teng, CHEN Kai-jie, XI Xu-yao, JIANG Zhong-he, WANG Wei-hua, YANG Qing-zhi. Electromagnetic-structure analysis of the resonant magnetic perturbation coils on J-TEXT [J]. Nuclear Fusion and Plasma Physics, 2024, 44(4): 436-443.
[2]	LONG Ting, NIE Lin, KE Rui, XU Min, WU Yi-fan, GUO Dong, WANG Zhan-hui, YUAN Bo-da, GONG Shao-bo, LIU Hao, HL-2A-Team . Poloidal rotation driven by turbulent residual stress in the edge of HL-2A plasmas [J]. NUCLEAR FUSION AND PLASMA PHYSICS, 2018, 2(1): 1-7.
[3]	GUO Dong, NIE Lin, WU Yi-fan, YUAN Bo-da,LONG Ting, KE Rui, GONG Shao-bo, XU Min. Effect of turbulence Reynolds stress and density perturbation on poloidal momentum transport [J]. NUCLEAR FUSION AND PLASMA PHYSICS, 2017, 37(2): 137-143.
[4]	CHEN Kun, GAO Ge. EAST共振磁扰动线圈电源响应延迟分析及优化 [J]. NUCLEAR FUSION AND PLASMA PHYSICS, 2017, 37(2): 194-198.
[5]	SONG De-yong, GAO Ge, FU Peng, CHENG Zhi-cai. Optimal design of RMP coil power supply in EAST [J]. NUCLEAR FUSION AND PLASMA PHYSICS, 2017, 37(2): 199-203.
[6]	REN Qing-hua, WANG Ying-qiao, LI Qing. Conceptual design and simulation of HL-2A RMP coils power supply [J]. NUCLEAR FUSION AND PLASMA PHYSICS, 2015, 35(1): 19-23.
[7]	ZHENG Mao-yue1, 2, RAO Bo1, 2, YI Bin1, 2, DING Yong-hua1, 2 . Design of the AC power control system for dynamic resonant magnetic perturbation on the J-TEXT tokamak [J]. NUCLEAR FUSION AND PLASMA PHYSICS, 2014, 34(3): 259-264.