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

Eliseev, L. G.; Melnikov, A. V.; Ascasibar, E.; Cappa, A.; Drabinskiy, M.; Hidalgo, C.; Khabanov, P. O.; Kharchev, N. K.; Kozachek, A. S.; Liniers, M.; Lysenko, S. E.; Ochando, M.; Pablos, J. de; Pastor, I.; Sharapov, S. E.; Spong, D. A.; Breizman, B. N.; Varela, J.

doi:10.1063/5.0049225

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

DOI:https://doi.org/10.1063/5.0049225· OSTI ID:1867603

^[1]; ^[2]; ^[3]; ^[3]; Drabinskiy, M. ^[4]; ^[3]; ^[4]; ^[5]; Kozachek, A. S. ^[6]; ^[3]; ^[4]; ^[3]; ^[3]; ^[3]; ^[7]; ^[8]; ^[9]; ^[10]

National Research Centre, Moscow (Russian Federation). Kurchatov Institute; Institute for Fusion Studies, The University of Texas at Austin
National Research Centre, Moscow (Russian Federation). Kurchatov Institute; National Research Nuclear University “MEPhI", Moscow (Russian Federation). Institute for Laser and Plasma Technologies
Research Centre for Energy, Environment and Technology (CIEMAT), Madrid (Spain). Laboratorio Nacional de Fusion
National Research Centre, Moscow (Russian Federation). Kurchatov Institute
National Research Centre, Moscow (Russian Federation). Kurchatov Institute; Russian Academy of Sciences (RAS), Moscow (Russian Federation)
Institute of Plasma Physics, Kharkov (Ukraine)
Culham Science Centre, Abingdon (United Kingdom). Culham Centre for Fusion Energy (CCFE)
Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States)
Univ. of Texas, Austin, TX (United States). Institute for Fusion Studies
Universidad Carlos III de Madrid, 28911 Leganés, Madrid, Spain

We study Alfvén Eigenmodes (AEs) in the TJ-II heliac in hydrogen plasmas heated by hydrogen cofield NBI. Taking advantage of the unique TJ-II flexibility in varying plasma current, we have observed strong variation of the AE frequency from f_AE ~ 30 to ~ 220 kHz for selected modes. An advanced heavy ion beam probe diagnostic determines the spatial location and internal amplitudes of the modes. The modes satisfy a local AE dispersion relation including the geodesic acoustic frequency that represents the lowest frequency of the mode. Linear MHD-modeling with STELLGAP and FAR3D codes shows that the calculated temporal evolution of the mode frequency reproduces the observed maxima and minima at the same time intervals with a similar frequency range and the radial profile peaks near the outer edge of the observed one.

View Accepted Manuscript (DOE)

Research Organization:: Univ. of Texas, Austin, TX (United States). Institute for Fusion Studies

Sponsoring Organization:: Comunidad de Madrid; Russian Science Foundation; USDOE; USDOE Office of Science (SC)

Grant/Contract Number:: FG02-04ER54742

OSTI ID:: 1867603

Alternate ID(s):: OSTI ID: 1809887

Journal Information:: Physics of Plasmas, Journal Name: Physics of Plasmas Journal Issue: 7 Vol. 28; ISSN 1070-664X

Publisher:: American Institute of Physics (AIP)Copyright Statement

Country of Publication:: United States

Language:: English

References (42)

Beam transmission dependence on beam parameters for TJ-II Neutral Beam Injectors Liniers, Macarena; Damba, Julius; Guasp, José Fusion Engineering and Design, Vol. 123 https://doi.org/10.1016/j.fusengdes.2017.05.104	journal	November 2017
Applied and fundamental aspects of fusion science Melnikov, Alexander V. Nature Physics, Vol. 12, Issue 5 https://doi.org/10.1038/nphys3759	journal	May 2016
Installation of an advanced heavy ion beam diagnostic on the TJ-II stellarator Bondarenko, I. S.; Chmuga, A. A.; Dreval, N. B. Review of Scientific Instruments, Vol. 72, Issue 1 https://doi.org/10.1063/1.1310593	journal	January 2001
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
Extension of geodesic acoustic mode theory to helical systems Watari, T.; Hamada, Y.; Fujisawa, A. Physics of Plasmas, Vol. 12, Issue 6 https://doi.org/10.1063/1.1922807	journal	June 2005
Plasma pressure effect on Alfvén cascade eigenmodes Breizman, B. N.; Pekker, M. S.; Sharapov, S. E. Physics of Plasmas, Vol. 12, Issue 11 https://doi.org/10.1063/1.2130692	journal	November 2005
Collisionless damping of zonal flows in helical systems Sugama, H.; Watanabe, T. -H. Physics of Plasmas, Vol. 13, Issue 1 https://doi.org/10.1063/1.2149311	journal	January 2006
Basic physics of Alfvén instabilities driven by energetic particles in toroidally confined plasmas Heidbrink, W. W. Physics of Plasmas, Vol. 15, Issue 5 https://doi.org/10.1063/1.2838239	journal	May 2008
Gyrokinetic simulation of global and local Alfvén eigenmodes driven by energetic particles in a DIII-D discharge Bass, E. M.; Waltz, R. E. Physics of Plasmas, Vol. 20, Issue 1 https://doi.org/10.1063/1.4773177	journal	January 2013
Study of Alfven eigenmodes stability in plasma with multiple NBI driven energetic particle species Varela, J.; Spong, D. A.; Garcia, L. Physics of Plasmas, Vol. 26, Issue 6 https://doi.org/10.1063/1.5098347	journal	June 2019
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
Stabilization of the Alfvén wave instability in a two-component tokamak Mazur, V. A.; Mikhajlovskij, A. B. Nuclear Fusion, Vol. 17, Issue 2 https://doi.org/10.1088/0029-5515/17/2/002	journal	April 1977
Effects of Ohmic current in the TJ-II stellarator López-Bruna, D.; Castejón, F.; Estrada, T. Nuclear Fusion, Vol. 44, Issue 5 https://doi.org/10.1088/0029-5515/44/5/008	journal	April 2004
Confinement transitions in TJ-II under Li-coated wall conditions Sánchez, J.; Acedo, M.; Alonso, A. Nuclear Fusion, Vol. 49, Issue 10 https://doi.org/10.1088/0029-5515/49/10/104018	journal	September 2009
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
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
Mitigation of NBI-driven Alfvén eigenmodes by electron cyclotron heating in the TJ-II stellarator Nagaoka, K.; Ido, T.; Ascasíbar, E. Nuclear Fusion, Vol. 53, Issue 7 https://doi.org/10.1088/0029-5515/53/7/072004	journal	July 2013
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
Energetic particle physics in fusion research in preparation for burning plasma experiments Gorelenkov, N. N.; Pinches, S. D.; Toi, K. Nuclear Fusion, Vol. 54, Issue 12 https://doi.org/10.1088/0029-5515/54/12/125001	journal	November 2014
The features of the global GAM in OH and ECRH plasmas in the T-10 tokamak Melnikov, A. V.; Eliseev, L. G.; Perfilov, S. V. Nuclear Fusion, Vol. 55, Issue 6 https://doi.org/10.1088/0029-5515/55/6/063001	journal	April 2015
Electron cyclotron heating can drastically alter reversed shear Alfvén eigenmode activity in DIII-D through finite pressure effects Van Zeeland, M. A.; Heidbrink, W. W.; Sharapov, S. E. Nuclear Fusion, Vol. 56, Issue 11 https://doi.org/10.1088/0029-5515/56/11/112007	journal	July 2016
Study of NBI-driven chirping mode properties and radial location by the heavy ion beam probe in the TJ-II stellarator Melnikov, A. V.; Eliseev, L. G.; Castejón, F. Nuclear Fusion, Vol. 56, Issue 11 https://doi.org/10.1088/0029-5515/56/11/112019	journal	August 2016
Transition from chirping to steady NBI-driven Alfvén modes caused by magnetic configuration variations in the TJ-II stellarator Melnikov, A. V.; Eliseev, L. G.; Ascasíbar, E. Nuclear Fusion, Vol. 56, Issue 7 https://doi.org/10.1088/0029-5515/56/7/076001	journal	June 2016
Improved confinement regimes induced by limiter biasing in the TJ-II stellarator Hidalgo, C.; Pedrosa, M. A.; Dreval, N. Plasma Physics and Controlled Fusion, Vol. 46, Issue 1 https://doi.org/10.1088/0741-3335/46/1/018	journal	December 2003
Geodesic–acoustic-mode in JFT-2M tokamak plasmas Ido, T.; Miura, Y.; Kamiya, K. Plasma Physics and Controlled Fusion, Vol. 48, Issue 4 https://doi.org/10.1088/0741-3335/48/4/S04	journal	March 2006
Major minority: energetic particles in fusion plasmas Breizman, B. N.; Sharapov, S. E. Plasma Physics and Controlled Fusion, Vol. 53, Issue 5 https://doi.org/10.1088/0741-3335/53/5/054001	journal	March 2011
Study of the neoclassical radial electric field of the TJ-II flexible heliac Velasco, J. L.; Castejón, F. Plasma Physics and Controlled Fusion, Vol. 54, Issue 1 https://doi.org/10.1088/0741-3335/54/1/015005	journal	December 2011
Complete multi-field characterization of the geodesic acoustic mode in the TCV tokamak de Meijere, C. A.; Coda, S.; Huang, Z. Plasma Physics and Controlled Fusion, Vol. 56, Issue 7 https://doi.org/10.1088/0741-3335/56/7/072001	journal	June 2014
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
ECRH effect on the electric potential and turbulence in the TJ-II stellarator and T-10 tokamak plasmas Melnikov, A. V.; Krupnik, L. I.; Ascasibar, E. Plasma Physics and Controlled Fusion, Vol. 60, Issue 8 https://doi.org/10.1088/1361-6587/aac97f	journal	June 2018
Active control of Alfvén eigenmodes in magnetically confined toroidal plasmas Garcia-Munoz, M.; Sharapov, S. E.; Van Zeeland, M. A. Plasma Physics and Controlled Fusion, Vol. 61, Issue 5 https://doi.org/10.1088/1361-6587/aaef08	journal	March 2019
Heavy ion beam probing—diagnostics to study potential and turbulence in toroidal plasmas Melnikov, A. V.; Krupnik, L. I.; Eliseev, L. G. Nuclear Fusion, Vol. 57, Issue 7 https://doi.org/10.1088/1741-4326/aa5382	journal	March 2017
3D effects on transport and plasma control in the TJ-II stellarator Castejón, F.; Alegre, D.; Alonso, A. Nuclear Fusion, Vol. 57, Issue 10 https://doi.org/10.1088/1741-4326/aa7691	journal	August 2017
Overview of recent TJ-II stellarator results Ascasíbar, E.; Alba, D.; Alegre, D. Nuclear Fusion, Vol. 59, Issue 11 https://doi.org/10.1088/1741-4326/ab205e	journal	July 2019
Effect of ECH/ECCD on energetic-particle-driven MHD modes in helical plasmas Yamamoto, S.; Nagasaki, K.; Nagaoka, K. Nuclear Fusion, Vol. 60, Issue 6 https://doi.org/10.1088/1741-4326/ab7f13	journal	June 2020
MHD stability of JT-60SA operation scenarios driven by passing energetic particles for a hot Maxwellian model Varela, J.; Watanabe, K. Y.; Shinohara, K. Nuclear Fusion, Vol. 60, Issue 9 https://doi.org/10.1088/1741-4326/ab9dd1	journal	August 2020
Density profile reconstruction using HIBP in ECRH plasmas in the TJ-II stellarator Khabanov, Ph. O.; Eliseev, L. G.; Melnikov, A. V. Journal of Instrumentation, Vol. 14, Issue 09 https://doi.org/10.1088/1748-0221/14/09/C09033	journal	September 2019
Observation of Reversed-Shear Alfvén Eigenmodes Excited by Energetic Ions in a Helical Plasma Toi, K.; Watanabe, F.; Tokuzawa, T. Physical Review Letters, Vol. 105, Issue 14 https://doi.org/10.1103/PhysRevLett.105.145003	journal	October 2010
Development of heavy ion beam probe diagnostics Dnestrovskij, Yu. N.; Melnikov, A. V.; Krupnik, L. I. IEEE Transactions on Plasma Science, Vol. 22, Issue 4 https://doi.org/10.1109/27.310637	journal	January 1994
Up-Down and In-Out Asymmetry Monitoring Based on Broadband Radiation Detectors Ochando, M. A.; Medina, F.; Zurro, B. Fusion Science and Technology, Vol. 50, Issue 2 https://doi.org/10.13182/FST06-A1252	journal	August 2006
Analysis of Magnetohydrodynamic Instabilities in TJ-II Plasmas Jiménez-Gómez, R.; Ascasíbar, E.; Estrada, T. Fusion Science and Technology, Vol. 51, Issue 1 https://doi.org/10.13182/FST07-A1283	journal	January 2007
Study of Alfvén Eigenmodes in the TJ-II Stellarator Melnikov, Alexander V.; Eliseev, Leonid G.; JimÉNez-GÓMez, Ruben Plasma and Fusion Research, Vol. 5 https://doi.org/10.1585/pfr.5.S2019	journal	January 2010

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