Results 1 to 10 of about 71 (57)

Neoclassical toroidal plasma viscosity in bounce-transit and drift resonance regimes in tokamaks

Nuclear Fusion, 2023
Neoclassical toroidal plasma viscosity in the bounce-transit and drift resonance regimes is calculated using a version of the drift kinetic equation that encompasses the physics of the nonlinear trapping and quasilinear plateau regimes in tokamaks. It is
K.C. Shaing, M. Garcia-Munoz, E. Viezzer
doaj   +4 more sources

Neoclassical Toroidal Plasma Viscosity Torque in Collisionless Regimes in Tokamaks [PDF]

Physical Review Letters, 2010
Bumpiness in a magnetic field enhances the magnitude of the plasma viscosity and increases the rate of the plasma flow damping. A general solution of the neoclassical toroidal plasma viscosity (NTV) torque induced by nonaxisymmetric magnetic perturbation (NAMP) in the collisionless regimes in tokamaks is obtained in this Letter.
Hans Rudolf Koslowski, K C Shaing, Yunfeng Liang   +2 more
exaly   +4 more sources

Simultaneous feedback control of plasma rotation and stored energy on NSTX-U using neoclassical toroidal viscosity and neutral beam injection. [PDF]

Phys Plasmas, 2017
A model-based feedback system is presented enabling the simultaneous control of the stored energy through βn and the toroidal rotation profile of the plasma in National Spherical Torus eXperiment Upgrade device. Actuation is obtained using the momentum from six injected neutral beams and the neoclassical toroidal viscosity generated by applying three ...
Goumiri IR, Rowley CW, Sabbagh SA, Gates DA, Boyer MD, Gerhardt SP, Kolemen E, Menard JE.   +7 more
europepmc   +4 more sources

How to calculate the neoclassical viscosity, diffusion, and current coefficients in general toroidal plasmas

Physics of Plasmas, 2002
A novel method to obtain the full neoclassical transport matrix for general toroidal plasmas by using the solution of the linearized drift kinetic equation with the pitch-angle-scattering collision operator is shown. In this method, the neoclassical coefficients for both poloidal and toroidal viscosities in toroidal helical systems can be obtained, and
H Sugama
exaly   +2 more sources

Modeling of toroidal momentum transport induced by neoclassical toroidal viscosity torque for ITER scenarios

Nuclear Fusion, 2023
Neoclassical toroidal viscosity (NTV) torque caused by resonant magnetic perturbation (RMP) and the induced toroidal momentum transport are investigated for International Thermonuclear Experimental Reactor (ITER) scenarios through numerical modeling. The
X.-T. Yan, Y.-W. Sun, L. Li, Y.-Q. Liu, N.-N. Bao, A. Loarte, S. Pinches, B.-N. Wan   +7 more
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Toroidal modeling of plasma flow damping and density pump-out by RMP during ELM mitigation in HL-2A

Nuclear Fusion, 2023
Reduction of both the plasma density and toroidal flow speed, due to application of the predominantly n  = 1 ( n is the toroidal mode number) resonant magnetic perturbation (RMP) for controlling the edge localized mode in the HL-2A tokamak, is ...
N. Zhang, Y.Q. Liu, D.L. Yu, Yi Liu, G.Z. Hao, L. Liu, X.X. He, T.F. Sun, X.Q. Ji, S. Wang, G.Q. Dong, X. Bai, Y.L. Wei, W.J. Chen, Y.W. Sun, M. Jiang, Y.P. Zhang, Z.B. Shi, W.L. Zhong, M. Xu   +19 more
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Resonant mode effects on rotation braking induced by n = 1 resonant magnetic perturbations in the EAST tokamak

Nuclear Fusion, 2023
The spectrum effects on toroidal rotation braking, induced by n  = 1 resonant magnetic perturbations (RMPs) in the discharges with $q_{95} = 4.1$ and $q_{95} = 5.1$ , are studied in the EAST tokamak.
H. Sheng, Y.W. Sun, X.Y. Li, H.H. Li, X.M. Wu, Y.Y. Li, S.F. Mao, Q. Ma, Y.Q. Liu, C. Ye, X.T. Yan, P.C. Xie, Q. Zang, H.H. Wang, M.N. Jia, M.Y. Ye, the EAST Team   +16 more
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Toroidal modeling of 3D perturbations generated by current filaments in scrape-off layer in tokamak with biased divertor targets

Nuclear Fusion, 2022
The divertor biasing technique offers a promising alternative to control the edge localized mode (ELM) as well as the divertor heat load in tokamaks, as compared to the resonant magnetic perturbation (RMP) generated by magnetic coils.
G.Z. Hao, G.Q. Dong, B.T. Cui, Y.Q. Liu, Y.H. Xu, T.F. Sun, X.Q. Ji, S. Wang, Y.F. Zhao, J.Q. Xu, X. Bai, N. Zhang, C.Y. Li, L. Wang, H.D. He, J.M. Gao, Yi Liu, W.L. Zhong, M. Xu, X.R. Duan   +19 more
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The effect of plasma beta on error-field penetration in radio-frequency wave heated plasmas in EAST

Nuclear Fusion, 2023
The plasma-beta effect on the n  = 1 resonant magnetic perturbation (RMP) field penetration in purely radio-frequency (RF) wave heated discharges has been investigated in EAST.
Cheng Ye, You-Wen Sun, Hui-Hui Wang, Yue-Qiang Liu, Tong-Hui Shi, Qing Zang, Tian-Qi Jia, Qun Ma, Shuai Gu, Nan Chu, Kai-Yang He, Man-Ni Jia, Xue-Min Wu, Peng-Cheng Xie, Hui Sheng, Hua Yang, Lian-Sheng Huang, Biao Shen, Miao-Hui Li, Jin-Ping Qian, the EAST Team   +20 more
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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