Results 21 to 30 of about 340,606 (99)

Effects of neoclassical toroidal viscosity on toroidal rotation under electron cyclotron resonance heating on J-TEXT tokamak

Nuclear Fusion
Influence of neoclassical toroidal viscosity (NTV) torque on intrinsic toroidal rotation caused by internal kink mode (IKM) in the J-TEXT tokamak is studied.
Hanhui Li, Youwen Sun, Lu Wang, Xingting Yan, Hui Sheng, Zhoujun Yang, Li Gao, Yonghua Ding, Zhongyong Chen, Zhipeng Chen, Donghui Xia, Wei Yan, Da Li, J-TEXT Team   +13 more
doaj   +1 more source

New insights into error field assessment from mode coupling effects based on RMP spectrum scanning experiments in EAST

Nuclear Fusion
Numerical simulations concerning the spectrum of resonant magnetic perturbation (RMP) on field penetration threshold in EAST are presented, since the underlying physics is not well understood by the linear response model.
Cheng Ye, You-Wen Sun, Hui-Hui Wang, Yue-Qiang Liu, Peng-Cheng Xie, Hui Sheng   +5 more
doaj   +1 more source

High-fidelity and explainable machine learning method for neoclassical toroidal viscosity torque prediction

Nuclear Fusion
A high-fidelity and explainable machine learning (ML) method for neoclassical toroidal viscosity (NTV) torque prediction is investigated in this work. The ML surrogate model is trained based on NTV torque datasets obtained from first-principles numerical
N. Bao, W. Zhou, X. Yan, Y. Sun, Y. Meng, Z. Lin, J. Huang, Y. Lu   +7 more
doaj   +1 more source

Investigation of MHD events and associated toroidal rotation variation in an EAST long-pulse discharge

Nuclear Fusion
The self-organizing regime has been studied in an Experimental Advanced Superconducting Tokamak (EAST) long-pulse discharge. Multiple magnetohydrodynamic (MHD) instabilities and associated change in the core toroidal rotation were observed. A m / n = 3/2
R.J. Zhu, Y.Q. Chu, H. Sheng, W.X. Ding, H.Q. Liu, A.D. Liu, S.X. Wang, H. Lian, S.Z. Yuan, Y.F. Jin, C.B. Wu, H.L. Zhao, L.Q. Xu, Q. Zang, Y.H. Ma, S.Z. Duan, H.S. Cai, the EAST Team   +17 more
doaj   +1 more source

MARS-Q modeling of low-n resistive kink-peeling modes and edge harmonic oscillations in DIII-D

Nuclear Fusion
Linear and quasilinear magnetohydrodynamic (MHD) modeling is carried out for two DIII-D discharges that both featured a transition from quiescent H-mode (QH) to wide-pedestal QH (WPQH).
Yueqiang Liu, Xi Chen, Zeyu Li, Fatima Ebrahimi   +3 more
doaj   +1 more source

Neoclassical Viscosities in NCSX and QPS with Few Toroidal Periods and Low Aspect Ratios [PDF]

Neoclassical Viscosities in NCSX and QPS with Few Toroidal Periods and Low Aspect Ratios
Previously reported benchmarking examples of the analytical formulae of neoclassical viscosities were presented implicitly assuming applications in a future integrated simulation system of the Large Helical Device (LHD). Therefore, the assumed toroidal period numbers were mainly N = 10.
MYNICK, Henry E., ZARNSTORF, Michael C., SPONG, Donald A., NISHIMURA, Shin, KU, Long-Poe, HIRSHMAN, Steven P., MIKKELSEN, David R.   +6 more
openaire   +2 more sources

Comparison of Parallel Viscosity with Neoclassical Theory [PDF]

, 1996
Toroidal rotation profiles are measured with charge exchange spectroscopy for the plasma heated with tangential NBI in CHS heliotron/torsatron device to estimate parallel viscosity. The parallel viscosity derived from the toroidal rotation velocity shows
Ida, K., Nakajima, N.
core  

Neoclassical offset toroidal velocity and auxiliary ion heating in tokamaks

, 2016
In conditions of ideal axisymmetry, for a magnetized plasma in a generic bounded domain, necessarily toroidal, the uniform absorption of external energy (e.g., RF or any isotropic auxiliary heating) cannot give rise to net forces or torques. Experimental
E, Lazzaro, E Lazzaro
core   +1 more source

Recent advances in physics and applications of 3D magnetic fields on the J-TEXT tokamak

Nuclear Fusion
This paper summarizes recent experimental and theoretical progress achieved on the J-TEXT tokamak during the past two years, with an emphasis on the physics and applications of three-dimensional (3D) magnetic fields.
Nengchao Wang, Yonghua Ding, Zhongyong Chen, Donghui Xia, Zhoujun Yang, Zhipeng Chen, Wei Zheng, Wei Yan, Da Li, Song Zhou, Chengshuo Shen, Zhengkang Ren, Feiyue Mao, Yangbo Li, Xixuan Chen, Chuanxu Zhao, Qinghu Yang, Qinlin Tao, Chi Lei, Wentao Geng, Zhangsheng Huang, Hanhui Li, Jie Yang, Yutong Yang, Jiankun Hua, Zhangrong Hou, Wei Xie, Jiangang Fang, Shengyang Xiao, Yinlong Yu, Fanxi Liu, Keze Li, Hai Liu, Xin Xu, Peng Shi, Ting Long, Jinlong Guo, Fengming Xue, Xinkun Ai, Yu Zhong, Junli Zhang, Zhonghe Jiang, Li Gao, Xiaoqing Zhang, Bo Rao, Lu Wang, Weixin Guo, Shiyong Zeng, Ping Zhu, Minghai Liu, Tao Xu, Shaoxiang Ma, Yong Yang, Chuan Li, Zhijiang Wang, Ming Zhang, Kexun Yu, Xiwei Hu, Y. Liang, Q. Yu, K. W. Gentle, Yuan Pan, the J-TEXT Team   +62 more
doaj   +1 more source

Effects of finite gradient B drift on collisional boundary layer analysis for neoclassical toroidal plasma viscosity in tokamaks

, 2010
The effects of finite gradient B drift are included in the collisional boundary layer analysis to improve the accuracy of the neoclassical toroidal plasma viscosity in tokamaks that have error fields or magnetohydrodynamic activities present.
Sabbagh, S.A., Sun, Y.W., JaeChun Seol, Chu, M.S., K.C. Shaing, S.A. Sabbagh, Shaing, K.C., Y.W. Sun, Seol, J.C., M.S. Chu   +9 more
core   +1 more source