研究成果報告書

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研究成果報告書

Transcription:

Simulation Study of Interaction between Alfvén Eigenmodes and Energetic Particles (TAE ) TAE TAE MHD ITER We studied the interaction between Alfvén eigenmodes and energetic particles in fusion plasmas with the hybrid simulation of energetic particles interacting with a magnetohydrodynamics (MHD) fluid. We clarified the properties of the interaction between toroidal Alfvén eigenmode (TAE mode)/reversed shear Alfvén eigenmode and energetic particles, the nonlinear MHD effects on the evolution of TAE instability and TAE bursts, the linear properties and the nonlinear frequency chirping of the energetic-particle driven geodesic acoustic modes, and the Alfvén eigenmodes and the energetic-particle transport in the ITER plasmas. MHD (MHD)ITER

(NBI)(ICRF) (1) (2) MHD (3) MHD (4) (5) ITER -(MHD) MEGA (3) MEGA (4)(5) (5) (1) MEGA RSAE TAE RSAE TAE RSAE TAE (2) MHD MHD MHD MHD MHD TAE 1% MHD MHD 1/2 0.1% MHD MHD TAE MHD TAE

MHD TAE (3) MHD MEGA (NBI) TFTR TAE TAE 2ms NBI MHD TAE TAE TAE TAE 0.5% 10% EGAM EGAM m=0, m=1, m=2 EGAM hole-clump EGAM hole clump hole clump EGAM EGAM v θ [km/s] f [khz] 60 50 40 30 10 0-10 (a) (b) 0 0.2 0.4 0.6 0.8 1 1.2 time [ms] -1-2 -3-4 EGAM hole clump TAE (4) (LHD) (EGAM) (5) ITER ITER ITER TAE TAE 10%

ITER TAE [1] H. Wang, Y. Todo, and C. C. Kim, Hole-clump pair creation in the evolution of energetic-particle-driven geodesic acoustic modes, Physical Review Letters, Vol. 110 (2013) 155006-1-155006-5. DOI: 10.1103/PhysRevLett.110.155006 [2] H. Wang and Y. Todo, Linear properties of energetic particle driven geodesic acoustic mode, Physics of Plasmas, Vol. 20 (2013) 012506-1 012506-8. DOI:10.1063/1.4774410 [3] Y. Todo, H. L. Berk, and B. N. Breizman, Saturation of a toroidal Alfvén eigenmode due to enhanced damping of nonlinear sidebands, Nuclear Fusion, Vol. 52 (2012) 094018-1 094018-8. DOI:10.1088/0029-5515/52/9/094018 [4] N. Mizuguchi, A. Sanpei, S. Fujita, K. Oki, H. Himura, S. Masamune, and K. Ichiguchi, Modeling of Formation of Helical Structures in Reversed-Field Pinch, Plasma and Fusion Research, Vol. 7 (2012) 2403117-1-2403117-4. DOI: 10.1585/pfr.7.2403117 [5] A. Bierwage, N. Aiba, Y. Todo, W. Deng, M. Ishikawa, G. Matsunaga, K. Shinohara, and M. Yagi, Nonlinear simulation of energetic particle modes in high-beta tokamak plasma, Plasma and Fusion Research, Vol. 7 (2012) 2403081-4 2403081-4. DOI:10.1585/pfr.7.2403081 [6] Y. Todo, H. L. Berk, and B. N. Breizman, Simulaion of Alfvén eigenmode bursts using a hybrid code for nonlinear maghetohydrodynamics and energetic particles, Nuclear Fusion, Vol. 52 (2012) 033003-1 - 033003-10. DOI: 10.1088/0029-5515/52/3/033003 [7] A. Bierwage, Y. Todo, N. Aiba, K. Shinohara, M. Ishikawa, and M. Yagi, Nonlinear hybrid simulations of energetic particle modes in realistic tokamak flux surface geometry, Plasma and Fusion Research, Vol. 6 (2011) 2403109-1 - 2403109-5. DOI:10.1585/pfr.6.2403109 [8] H. Wang and Y. Todo, Interaction between energetic particles and Alfvén eigenmodes in reversed shear plasmas, Journal of the Physical Society of Japan, Vol. 80 (2011) 094501-1 - 094501-7. DOI: 10.1143/JPSJ.80.094501 [9] Y. Todo, N. Nakajima, M. Sato, and H. Miura, Simulation study of ballooning modes in LHD, Plasma and Fusion Research, Vol. 5 (2010) S2062-1 - S2062-4. DOI: 10.1585/pfr.5.S2062 [10] Y. Todo, H. L. Berk, and B. N. Breizman, Nonlinear magnetohydrodynamic effecs on Alfven eigenmode evolution and zonal flow generation, Nuclear Fusion, Vol. 50 (2010) pp. 084016-1 - 084016-9. DOI: 10.1088/0029-5515/50/8/084016 [11] Y. Todo, S. Murakami, T. Yamamoto, A. Fukuyama, D. A. Spong, S. Yamamoto, M. Osakabe, and N. Nakajima, Numerical Analyses of Energetic Particles in LHD, Fusion Science and Technology, Vol. 58 (2010) pp. 277-288. http://epubs.ans.org/?a=10814 [12] D. A. Spong, E. D'Azevedo, and Y. Todo, Clustered frequency analysis of shear Alfven modes in stellarators, Physics of Plasmas, Vol. 17 (2010) 022106-1 - 022106-12. DOI: 10.1063/1.3313818 [13] Y. Todo, N. Nakajima, M. Osakabe, S. Yamamoto, D. A. Spong, Simulation study of energetic ion transport due to Alfvén eigenmodes in LHD plasma, Plasma and Fusion Research, Vol. 3 (2008) S1074-1 - S1074-4. DOI: 10.1585/pfr.3.S1074 [14] T.-H. Watanabe, Y. Todo, and W. Horton, Benchmark Tests of Fusion Plasma Simulation Codes for Studying Microturbulence and Energetic-Particle Dynamics, Plasma and Fusion Research, Vol. 3 (2008) 061-1 - 061-6. DOI: 10.1585/pfr.3.061 [1] Y. Todo and A. Bierwage, Alfvén eigenmodes and energetic particle transport in ITER steady state scenario, 22nd International Toki Conference (19-22 November 2012, Toki). [2] N. Mizuguchi and P. Zhu, MHD simulation study on the evolution of filament structures on the edge-localized modes, 22nd International Toki Conference (19-22 November 2012, Toki).

[3] H. Wang, Y. Todo, and C. C. Kim, Linear properties and nonlinear frequency chirping of energetic particle driven geodesic acoustic mode in LHD, 24th IAEA Fusion Energy Conference (8-13 October 2012, San Diego, USA), TH/P6-20. [4] N. Mizuguchi, A. Sanpei, K. Oki, S. Masamune, H. Himura, K. Ichiguchi and Y. Todo, Numerical Modeling of Formation of Helical Structures in Reversed-Field-Pinch Plasma, 24th IAEA Fusion Energy Conference (8-13 October 2012, San Diego, USA). [5] Y. Todo, H. L. Berk, and B. N. Breizman, Nonlinear MHD effects on Alfvén eigenmode bursts, 8th Genearal Scientific Assembly of the Asia Plasma and Fusion Association in 2011 (1-4 November 2011, Guilin, China). [6] Y. Todo, H. L. Berk, and B. N. Breizman, Nonlinear MHD and energetic particles hybrid simulation of Alfvén eigenmode bursts, 12th IAEA Technical Meeting on Energetic Particles in Magnetic Confinement Systems (7-10 September 2011, Austin, USA). [7] Y. Todo, H. L. Berk, and B. N. Breizman, Computer Simulation of Alfvén Eigenmode Bursts Driven by Energetic Particles in Fusion Plasmas, 11st Asia Pacific Physics Conference (15-18 November 2010, Shanghai, China). [8] Y. Todo, H. L. Berk, and B. N. Breizman, Simulation Study of Nonlinear Magnetohydrodynamic Effects on Alfvén Eigenmode Evolution and Zonal Flow Generation, 23rd IAEA Fusion Energy Conference (11-16 October 2010, Daejeon, Korea), THW/2-3Ra. [9] Y. Todo, N. Nakajima, M. Sato, and H. Miura, Simulation study of ballooning modes in LHD, 19th International Toki Conference (8-11 December 2009, Toki). [10] Y. Todo, H. L. Berk, and B. N. Breizman, Interaction of energeticparticles, Alfvén eigenmode, and zonal flow and fields, 11th IAEA Technical Meeting on Energetic Particles in Magnetic Confinement Systems (21-23 September 2009, Kiev, Ukraine). [11] Y. Todo, H. L. Berk, and B. N. Breizman, Nonlinear evolution of Alfvén eigenmode and exciation of geodesic acoustic mode, 4th IAEA Technical Meeting on Theory of Plasma Instabilities (18-20 May 2009, Kyoto). [12] Y. Todo, N. Nakajima, M. Osakabe, S. Yamamoto, D. A. Spong, Simulation study of interaction between energetic ions and Alfvén eigenmodes in LHD, 22nd IAEA Fusion Energy Conference (13-18 October 2008, Geneva, Switzerland), TH/P3-9.

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