Toroidal modeling of plasma flow damping and density pump-out by RMP during ELM mitigation in HL-2A

Zhang, N.; Liu, Y. Q.; Yu, D. L.; Liu, Yi; Hao, G. Z.; Liu, L.; He, X. X.; Sun, T. F.; Ji, X. Q.; Wang, S.; Dong, G. Q.; Bai, X.; Wei, Y. L.; Chen, W. J.; Sun, Y. W.; Jiang, M.; Zhang, Y. P.; Shi, Z. B.; Zhong, W. L.; Xu, M.

doi:10.1088/1741-4326/acdf71

Toroidal modeling of plasma flow damping and density pump-out by RMP during ELM mitigation in HL-2A

Journal Article · Wed Jun 28 00:00:00 EDT 2023 · Nuclear Fusion

DOI:https://doi.org/10.1088/1741-4326/acdf71· OSTI ID:2418883

^[1]; ^[2]; Yu, D. L. ^[3]; Liu, Yi ^[3]; ^[3]; Liu, L. ^[3]; ^[3]; Sun, T. F. ^[3]; Ji, X. Q. ^[3]; ^[3]; ^[3]; ^[4]; ^[3]; Chen, W. J. ^[3]; ^[5]; Jiang, M. ^[3]; Zhang, Y. P. ^[3]; Shi, Z. B. ^[3]; Zhong, W. L. ^[3]; Xu, M. ^[3]

Southwestern Institute of Physics, Chengdu (China); OSTI
General Atomics, San Diego, CA (United States)
Southwestern Institute of Physics, Chengdu (China)
Southwestern Institute of Physics, Chengdu (China); ITER Organization, St. Paul Lez Durance (France)
Chinese Academy of Sciences (CAS), Hefei (China). Inst. of Plasma Physics

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 numerically investigated utilizing the quasi-linear initial-value code MARS-Q (Liu et al 2013 Phys. Plasmas 20 042503). Simulation results reveal that the neoclassical toroidal viscosity (NTV) due to three dimensional fields plays the key role in modifying the plasma momentum and particle transport in the HL-2A discharge. By comparing the modeling results with the measured density pump-out in the experiment, the electron NTV particle flux model, in combination with the free-boundary condition for the axisymmetric change of the density at the plasma edge, is found to yield the best agreement in terms of both the pump-out level and the overall time scale. Further sensitivity studies show that the simulated density pump-out level is reasonably robust against variations in the model assumptions, including the particle diffusion model and the non-ambipolar versus ambipolar NTV particle flux. The latter however affects the time scale for reaching the steady state solution. Finally, it is found that the plasma edge-peeling response, the NTV torque, as well as the plasma momentum and particle transport, all are sensitive to the toroidal phase difference between the upper and lower rows of the RMP coil currents in HL-2A, with the 30^∘ coil phasing producing the minimal side effects on the plasma.

View Accepted Manuscript (DOE)

Research Organization:: General Atomics, San Diego, CA (United States)

Sponsoring Organization:: USDOE Office of Science (SC); National Key R&D Program of China; National Natural Science Foundation of China (NSFC)

Grant/Contract Number:: FC02-04ER54698; FG02-95ER54309

OSTI ID:: 2418883

Journal Information:: Nuclear Fusion, Journal Name: Nuclear Fusion Journal Issue: 8 Vol. 63; ISSN 0029-5515

Publisher:: IOP ScienceCopyright Statement

Country of Publication:: United States

Language:: English

References (39)

The CHEASE code for toroidal MHD equilibria Lütjens, H.; Bondeson, A.; Sauter, O. Computer Physics Communications, Vol. 97, Issue 3 https://doi.org/10.1016/0010-4655(96)00046-X	journal	September 1996
Feedback stabilization of nonaxisymmetric resistive wall modes in tokamaks. I. Electromagnetic model Liu, Y. Q.; Bondeson, A.; Fransson, C. M. Physics of Plasmas, Vol. 7, Issue 9 https://doi.org/10.1063/1.1287744	journal	September 2000
Magnetohydrodynamic-activity-induced toroidal momentum dissipation in collisionless regimes in tokamaks Shaing, K. C. Physics of Plasmas, Vol. 10, Issue 5 https://doi.org/10.1063/1.1567285	journal	May 2003
Plasma transport in stochastic magnetic field caused by vacuum resonant magnetic perturbations at diverted tokamak edge Park, G.; Chang, C. S.; Joseph, I. Physics of Plasmas, Vol. 17, Issue 10 https://doi.org/10.1063/1.3487733	journal	October 2010
Toroidal modeling of penetration of the resonant magnetic perturbation field Liu, Yueqiang; Kirk, A.; Sun, Y. Physics of Plasmas, Vol. 20, Issue 4 https://doi.org/10.1063/1.4799535	journal	April 2013
Modelling of edge localised modes and edge localised mode control Huijsmans, G. T. A.; Chang, C. S.; Ferraro, N. Physics of Plasmas, Vol. 22, Issue 2 https://doi.org/10.1063/1.4905231	journal	February 2015
Comparative investigation of ELM control based on toroidal modelling of plasma response to RMP fields Liu, Yueqiang; Kirk, A.; Li, Li Physics of Plasmas, Vol. 24, Issue 5 https://doi.org/10.1063/1.4978884	journal	May 2017
Modeling of toroidal torques exerted by internal kink instability in a tokamak plasma Zhang, N.; Liu, Y. Q.; Yu, D. L. Physics of Plasmas, Vol. 24, Issue 8 https://doi.org/10.1063/1.4995271	journal	August 2017
The density dependence of edge-localized-mode suppression and pump-out by resonant magnetic perturbations in the DIII-D tokamak Hu, Q. M.; Nazikian, R.; Grierson, B. A. Physics of Plasmas, Vol. 26, Issue 12 https://doi.org/10.1063/1.5134767	journal	December 2019
Study of in-vessel nonaxisymmetric ELM suppression coil concepts for ITER Schaffer, M. J.; Menard, J. E.; Aldan, M. P. Nuclear Fusion, Vol. 48, Issue 2 https://doi.org/10.1088/0029-5515/48/2/024004	journal	January 2008
An approximate analytic expression for neoclassical toroidal plasma viscosity in tokamaks Shaing, K. C.; Sabbagh, S. A.; Chu, M. S. Nuclear Fusion, Vol. 50, Issue 2 https://doi.org/10.1088/0029-5515/50/2/025022	journal	January 2010
Modification of the edge transport barrier by resonant magnetic perturbations Rozhansky, V.; Kaveeva, E.; Molchanov, P. Nuclear Fusion, Vol. 50, Issue 3 https://doi.org/10.1088/0029-5515/50/3/034005	journal	February 2010
Modelling of plasma response to resonant magnetic perturbation fields in MAST and ITER Liu, Yueqiang; Kirk, A.; Gribov, Y. Nuclear Fusion, Vol. 51, Issue 8 https://doi.org/10.1088/0029-5515/51/8/083002	journal	June 2011
Modelling of the edge plasma of MAST in the presence of resonant magnetic perturbations Rozhansky, V.; Molchanov, P.; Kaveeva, E. Nuclear Fusion, Vol. 51, Issue 8 https://doi.org/10.1088/0029-5515/51/8/083009	journal	July 2011
Numerical validation of the refined formula of neoclassical toroidal plasma viscosity in tokamaks Sun, Y.; Shaing, K. C.; Liang, Y. Nuclear Fusion, Vol. 53, Issue 7 https://doi.org/10.1088/0029-5515/53/7/073026	journal	June 2013
Progress on the application of ELM control schemes to ITER scenarios from the non-active phase to DT operation Loarte, A.; Huijsmans, G.; Futatani, S. Nuclear Fusion, Vol. 54, Issue 3 https://doi.org/10.1088/0029-5515/54/3/033007	journal	February 2014
Neoclassical plasma viscosity and transport processes in non-axisymmetric tori Shaing, K. C.; Ida, K.; Sabbagh, S. A. Nuclear Fusion, Vol. 55, Issue 12 https://doi.org/10.1088/0029-5515/55/12/125001	journal	November 2015
Dependence of neoclassical toroidal viscosity on the poloidal spectrum of applied nonaxisymmetric fields Logan, N. C.; Park, J. -K.; Paz-Soldan, C. Nuclear Fusion, Vol. 56, Issue 3 https://doi.org/10.1088/0029-5515/56/3/036008	journal	February 2016
Non-linear modeling of the plasma response to RMPs in ASDEX Upgrade Orain, F.; Hölzl, M.; Viezzer, E. Nuclear Fusion, Vol. 57, Issue 2 https://doi.org/10.1088/0029-5515/57/2/022013	journal	September 2016
Toroidal rotation braking with n = 1 magnetic perturbation field on JET Sun, Y.; Liang, Y.; Koslowski, H. R. Plasma Physics and Controlled Fusion, Vol. 52, Issue 10 https://doi.org/10.1088/0741-3335/52/10/105007	journal	September 2010
Magnetic perturbation experiments on MAST L- and H-mode plasmas using internal coils Kirk, A.; Liu, Yueqiang; Nardon, E. Plasma Physics and Controlled Fusion, Vol. 53, Issue 6 https://doi.org/10.1088/0741-3335/53/6/065011	journal	April 2011
Toroidal modeling of plasma response and resonant magnetic perturbation field penetration Liu, Y. Q.; Kirk, A.; Sun, Y. Plasma Physics and Controlled Fusion, Vol. 54, Issue 12 https://doi.org/10.1088/0741-3335/54/12/124013	journal	November 2012
ELM control with RMP: plasma response models and the role of edge peeling response Liu, Yueqiang; Ham, C. J.; Kirk, A. Plasma Physics and Controlled Fusion, Vol. 58, Issue 11 https://doi.org/10.1088/0741-3335/58/11/114005	journal	October 2016
Modeling 3D plasma boundary corrugation and tailoring toroidal torque profiles with resonant magnetic perturbation fields in ITER Li, L.; Liu, Y. Q.; Loarte, A. Nuclear Fusion, Vol. 59, Issue 9 https://doi.org/10.1088/1741-4326/ab2bca	journal	August 2019
Role of 3D neoclassical particle flux in density pump-out during ELM control by RMP in DIII-D Liu, Yueqiang; Paz-Soldan, C.; Li, Li Nuclear Fusion, Vol. 60, Issue 3 https://doi.org/10.1088/1741-4326/ab6c35	journal	February 2020
Toroidal modelling of core plasma flow damping by RMP fields in hybrid discharge on ASDEX upgrade Zhang, N.; Liu, Y. Q.; Piovesan, P. Nuclear Fusion, Vol. 60, Issue 9 https://doi.org/10.1088/1741-4326/ab9dce	journal	August 2020
Modeling plasma toroidal flow profile control via NTV torque with n = 2 3D fields in MAST-U Liu, Yueqiang; Kirk, A.; Lyons, B. C. Nuclear Fusion, Vol. 60, Issue 9 https://doi.org/10.1088/1741-4326/aba334	journal	August 2020
Edge-coherent oscillation providing nearly continuous transport during edge-localized mode mitigation by n = 1 resonant magnetic perturbation in HL-2A Sun, T. F.; Liu, Y.; Ji, X. Q. Nuclear Fusion, Vol. 61, Issue 3 https://doi.org/10.1088/1741-4326/abd2c7	journal	February 2021
Toroidal modeling of plasma response to RMP fields for HL-2M Hao, G. Z.; Li, C. Y.; Liu, Y. Q. Nuclear Fusion, Vol. 61, Issue 12 https://doi.org/10.1088/1741-4326/ac2ff6	journal	November 2021
Non-linear MHD modelling of edge localized modes suppression by resonant magnetic perturbations in ITER Becoulet, M.; Huijsmans, G. T. A.; Passeron, C. Nuclear Fusion, Vol. 62, Issue 6 https://doi.org/10.1088/1741-4326/ac47af	journal	April 2022
Toroidal modeling of 3D perturbations generated by current filaments in scrape-off layer in tokamak with biased divertor targets Hao, G. Z.; Dong, G. Q.; Cui, B. T. Nuclear Fusion, Vol. 63, Issue 1 https://doi.org/10.1088/1741-4326/aca169	journal	November 2022
First Observation of Edge Localized Modes Mitigation with Resonant and Nonresonant Magnetic Perturbations in ASDEX Upgrade Suttrop, W.; Eich, T.; Fuchs, J. C. Physical Review Letters, Vol. 106, Issue 22 https://doi.org/10.1103/PhysRevLett.106.225004	journal	June 2011
Suppression of Edge Localized Modes in High-Confinement KSTAR Plasmas by Nonaxisymmetric Magnetic Perturbations Jeon, Y. M.; Park, J. -K.; Yoon, S. W. Physical Review Letters, Vol. 109, Issue 3 https://doi.org/10.1103/PhysRevLett.109.035004	journal	July 2012
Observation of a Multimode Plasma Response and its Relationship to Density Pumpout and Edge-Localized Mode Suppression Paz-Soldan, C.; Nazikian, R.; Haskey, S. R. Physical Review Letters, Vol. 114, Issue 10 https://doi.org/10.1103/PhysRevLett.114.105001	journal	March 2015
Nonlinear Transition from Mitigation to Suppression of the Edge Localized Mode with Resonant Magnetic Perturbations in the EAST Tokamak Sun, Y.; Liang, Y.; Liu, Y. Q. Physical Review Letters, Vol. 117, Issue 11 https://doi.org/10.1103/PhysRevLett.117.115001	journal	September 2016
Sustained Stabilization of the Resistive-Wall Mode by Plasma Rotation in the DIII-D Tokamak Garofalo, A. M.; Strait, E. J.; Johnson, L. C. Physical Review Letters, Vol. 89, Issue 23 https://doi.org/10.1103/PhysRevLett.89.235001	journal	November 2002
Suppression of Large Edge-Localized Modes in High-Confinement DIII-D Plasmas with a Stochastic Magnetic Boundary Evans, T. E.; Moyer, R. A.; Thomas, P. R. Physical Review Letters, Vol. 92, Issue 23 https://doi.org/10.1103/PhysRevLett.92.235003	journal	June 2004
Active Control of Type-I Edge-Localized Modes with n = 1 Perturbation Fields in the JET Tokamak Liang, Y.; Koslowski, H. R.; Thomas, P. R. Physical Review Letters, Vol. 98, Issue 26 https://doi.org/10.1103/PhysRevLett.98.265004	journal	June 2007
Effect of Neoclassical Toroidal Viscosity on Error-Field Penetration Thresholds in Tokamak Plasmas Cole, A. J.; Hegna, C. C.; Callen, J. D. Physical Review Letters, Vol. 99, Issue 6 https://doi.org/10.1103/PhysRevLett.99.065001	journal	August 2007

Similar Records

Nonlinear modeling of ELM mitigation with RMP on HL-2A

Journal Article · Mon Jul 29 00:00:00 EDT 2024 · Nuclear Fusion · OSTI ID:2578828

Toroidal modeling of 3D perturbations generated by current filaments in scrape-off layer in tokamak with biased divertor targets

Journal Article · Sun Nov 27 23:00:00 EST 2022 · Nuclear Fusion · OSTI ID:2418880

Related Subjects

70 PLASMA PHYSICS AND FUSION TECHNOLOGY
NTV
Physics
RMP fields
density pump-out
flow damping

Toroidal modeling of plasma flow damping and density pump-out by RMP during ELM mitigation in HL-2A

Citation Formats

References (39)

Similar Records

Related Subjects