Modelling of beam-driven Alfvén modes in TJ-II plasmas

Rakha, Allah; Mantsinen, M. J.; Melnikov, A. V.; Sharapov, S. E.; Spong, D. A.; López-Fraguas, A.; Castejón, F.; Gutiérrez-Millá, A.; de Pablos, J. L.; Sáez, X.

doi:10.1088/1741-4326/ab0030

Title: Modelling of beam-driven Alfvén modes in TJ-II plasmas

Journal Article · Thu Mar 14 00:00:00 EDT 2019 · Nuclear Fusion

DOI:https://doi.org/10.1088/1741-4326/ab0030· OSTI ID:1807300

^[1]; Mantsinen, M. J. ^[2];

^[3];

^[4];

^[5]; López-Fraguas, A. ^[6];

^[6]; Gutiérrez-Millá, A. ^[1]; de Pablos, J. L. ^[6]; Sáez, X. ^[1]

Barcelona Supercomputing Center (Spain)
Barcelona Supercomputing Center (Spain); Univ. Autonoma de Barcelona (Spain). Inst. Catalana de Recerca i Estudis Avancats (ICREA)
National Research Centre, Moscow (Russian Federation). Kurchatov Institute; Moscow Inst. of Physics and Technology (MIPT), Moscow (Russian Federation); National Research Nuclear University MEPhI, Moscow (Russian Federation)
Culham Science Centre, Abingdon (United Kingdom). Culham Centre for Fusion Energy (CCFE), EURATOM/UKAEA Fusion Association
Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States)
Research Centre for Energy, Environment and Technology (CIEMAT), Madrid (Spain)

Here, the properties of hydrogen neutral beam injection driven Alfvén eigenmodes (AEs) in the TJ-II flexible heliac are investigated using a reduced magnetohydrodynamic (MHD) model coupled to a realistic MHD equilibrium. The simulation results of AE frequency and radial localization are found to be broadly consistent with experimental observations. The simulation results show that an AE with the same poloidal and toroidal harmonics persists under small variations in on-axis iota values, which is consistent with the experimental observations. The corresponding wave-particle resonance maps suggest, for low bounce harmonics, the possibility of describing nonlinear evolution of the AEs in TJ-II by a sum of two ion populations with different weighting factors, one of which is dominated by drag and the other by diffusion. As the bounce harmonic increases, the resonance region starts to expand and can cover a significant area of the particle phase space until this resonance region vanishes at high bounce harmonics.

View Accepted Manuscript (DOE)

Cite

Export

Save

Research Organization:: Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States)

Sponsoring Organization:: USDOE; European Research Council (ERC); Ministry of Economic Affairs and Digital Transformation of Spain (MINECO); Russian Science Foundation

Grant/Contract Number:: AC05-00OR22725; 633053; ENE2015-67371-R; 14-22-00193

OSTI ID:: 1807300

Journal Information:: Nuclear Fusion, Vol. 59, Issue 5; ISSN 0029-5515

Publisher:: IOP ScienceCopyright Statement

Country of Publication:: United States

Language:: English

References (22)

Alfvén continuum and high-frequency eigenmodes in optimized stellarators Kolesnichenko, Ya. I.; Lutsenko, V. V.; Wobig, H. Physics of Plasmas, Vol. 8, Issue 2 https://doi.org/10.1063/1.1339228	journal	February 2001
Clustered frequency analysis of shear Alfvén modes in stellarators Spong, D. A.; D’Azevedo, E.; Todo, Y. Physics of Plasmas, Vol. 17, Issue 2 https://doi.org/10.1063/1.3313818	journal	February 2010
Energetic-Ion-Driven Global Instabilities Observed in the Large Helical Device and Their Effects on Energetic Ion Confinement Toi, Kazuo Plasma and Fusion Research, Vol. 8, Issue 0 https://doi.org/10.1585/pfr.8.1102002	journal	January 2013
Coupling of Alfvén and sound waves in stellarator plasmas Könies, Axel; Eremin, Denis Physics of Plasmas, Vol. 17, Issue 1 https://doi.org/10.1063/1.3274921	journal	January 2010
Kinetic simulations of fast ions in stellarators Bustos, A.; Castejón, F.; Osakabe, M. Nuclear Fusion, Vol. 51, Issue 8 https://doi.org/10.1088/0029-5515/51/8/083040	journal	July 2011
Effect of dynamical friction on nonlinear energetic particle modes Lilley, M. K.; Breizman, B. N.; Sharapov, S. E. Physics of Plasmas, Vol. 17, Issue 9 https://doi.org/10.1063/1.3486535	journal	September 2010
Mitigation of Alfvénic activity by 3D magnetic perturbations on NSTX Kramer, G. J.; Bortolon, A.; Ferraro, N. M. Plasma Physics and Controlled Fusion, Vol. 58, Issue 8 https://doi.org/10.1088/0741-3335/58/8/085003	journal	July 2016
Steepest-descent moment method for three-dimensional magnetohydrodynamic equilibria Hirshman, S. P. Physics of Fluids, Vol. 26, Issue 12 https://doi.org/10.1063/1.864116	journal	January 1983
Two species drag/diffusion model for energetic particle driven modes Aslanyan, V.; Sharapov, S. E.; Spong, D. A. Physics of Plasmas, Vol. 24, Issue 12 https://doi.org/10.1063/1.4996123	journal	December 2017
Influence of magnetic well on electromagnetic turbulence in the TJ-II stellarator Castejón, F.; de Aguilera, M.; Ascasíbar, E. Plasma Physics and Controlled Fusion, Vol. 58, Issue 9 https://doi.org/10.1088/0741-3335/58/9/094001	journal	July 2016
Internal measurements of Alfvén eigenmodes with heavy ion beam probing in toroidal plasmas Melnikov, A. V.; Eliseev, L. G.; Jiménez-Gómez, R. Nuclear Fusion, Vol. 50, Issue 8 https://doi.org/10.1088/0029-5515/50/8/084023	journal	July 2010
Generalized reduced magnetohydrodynamic equations Kruger, S. E.; Hegna, C. C.; Callen, J. D. Physics of Plasmas, Vol. 5, Issue 12 https://doi.org/10.1063/1.873152	journal	December 1998
Simulations of fast ions distribution in stellarators based on coupled Monte Carlo fuelling and orbit codes Rodríguez-Pascual, M.; Bustos, A.; Castejón, F. Plasma Physics and Controlled Fusion, Vol. 55, Issue 8 https://doi.org/10.1088/0741-3335/55/8/085014	journal	June 2013
Alfvén eigenmodes measured in the TJ-II stellarator Jiménez-Gómez, R.; Könies, A.; Ascasíbar, E. Nuclear Fusion, Vol. 51, Issue 3 https://doi.org/10.1088/0029-5515/51/3/033001	journal	February 2011
Shear Alfvén continua in stellarators Spong, D. A.; Sanchez, R.; Weller, A. Physics of Plasmas, Vol. 10, Issue 8 https://doi.org/10.1063/1.1590316	journal	August 2003
Compressional ideal magnetohydrodynamics: Unstable global modes, stable spectra, and Alfvén eigenmodes in Wendelstein 7–X-type equilibria Nührenberg, Carolin Physics of Plasmas, Vol. 6, Issue 1 https://doi.org/10.1063/1.873268	journal	January 1999
Alfvén eigenmode properties and dynamics in the TJ-II stellarator Melnikov, A. V.; Eliseev, L. G.; Ascasibar, E. Nuclear Fusion, Vol. 52, Issue 12 https://doi.org/10.1088/0029-5515/52/12/123004	journal	November 2012
A Jacobi–Davidson Iteration Method for Linear Eigenvalue Problems G. Sleijpen, Gerard L.; Van der Vorst, Henk A. SIAM Journal on Matrix Analysis and Applications, Vol. 17, Issue 2 https://doi.org/10.1137/S0895479894270427	journal	April 1996
Destabilizing Effect of Dynamical Friction on Fast-Particle-Driven Waves in a Near-Threshold Nonlinear Regime Lilley, M. K.; Breizman, B. N.; Sharapov, S. E. Physical Review Letters, Vol. 102, Issue 19 https://doi.org/10.1103/PhysRevLett.102.195003	journal	May 2009
Shear Alfvén mode resonances in nonaxisymmetric toroidal low-pressure plasmas. II. Singular modes in the shear Alfvén continuum Salat, A.; Tataronis, J. A. Physics of Plasmas, Vol. 8, Issue 4 https://doi.org/10.1063/1.1352058	journal	January 2001
Effect of magnetic configuration on frequency of NBI-driven Alfvén modes in TJ-II Melnikov, A. V.; Ochando, M.; Ascasibar, E. Nuclear Fusion, Vol. 54, Issue 12 https://doi.org/10.1088/0029-5515/54/12/123002	journal	October 2014
Monte Carlo studies of transport in stellarators Fowler, R. H.; Rome, J. A.; Lyon, J. F. Physics of Fluids, Vol. 28, Issue 1 https://doi.org/10.1063/1.865153	journal	January 1985

Similar Records

Analysis of Alfven eigenmodes destabilization by energetic particles in TJ-II using a Landau-closure model

Journal Article · Thu Sep 21 00:00:00 EDT 2017 · Nuclear Fusion · OSTI ID:1807300

Varela, Jacobo; Spong, Donald A.; Garcia, Luis

Experimental observation of the geodesic acoustic frequency limit for the NBI-driven Alfvén eigenmodes in TJ-II

Journal Article · Thu Jul 01 00:00:00 EDT 2021 · Physics of Plasmas · OSTI ID:1807300

Eliseev, L. G.; Melnikov, A. V.; Ascasibar, E.; +15 more

Modification of the Alfvén wave spectrum by pellet injection

Journal Article · Wed Sep 04 00:00:00 EDT 2019 · Nuclear Fusion · OSTI ID:1807300

Oliver, H. J.C.; Sharapov, S. E.; Breizman, B. N.; +3 more

Related Subjects

70 PLASMA PHYSICS AND FUSION TECHNOLOGY

Title: Modelling of beam-driven Alfvén modes in TJ-II plasmas

Citation Formats

References (22)

Similar Records

Related Subjects