Large-scale structures in gyrofluid ETG/ITG turbulence and ion/electron transport 20 th IAEA Fusion Energy Conference, Vilamoura, Portugal, 1 - 6 November.

Slides:

Advertisements

Similar presentations

Statistical Properties of Broadband Magnetic Turbulence in the Reversed Field Pinch John Sarff D. Craig, L. Frassinetti 1, L. Marrelli 1, P. Martin 1,

Advertisements

Key Questions and Issues in turbulent Transport in Tokamaks JAEA M. Kikuchi 2 nd APTWG at Chengdu, Plenary session, presentation number PL-1 1PL-1 Acknowledgements:

Short wavelength ion temperature gradient driven instability in toroidal plasmas Zhe Gao, a) H. Sanuki, b) K. Itoh b) and J. Q. Dong c) a) Department of.

Simulations of the core/SOL transition of a tokamak plasma Frederic Schwander,Ph. Ghendrih, Y. Sarazin IRFM/CEA Cadarache G. Ciraolo, E. Serre, L. Isoardi,

Zonal flow suppression of ETG turbulence S. Parker, J. Kohut, Y. Chen, Univ. of Colorado W. Lee, PPPL Z. Lin, UC-Irvine Disclosure: Views expressed are.

INTRODUCTION OF WAVE-PARTICLE RESONANCE IN TOKAMAKS J.Q. Dong Southwestern Institute of Physics Chengdu, China International School on Plasma Turbulence.

Reduced transport regions in rotating tokamak plasmas Michael Barnes University of Oxford Culham Centre for Fusion Energy Michael Barnes University of.

1 Global Gyrokinetic Simulations of Toroidal ETG Mode in Reversed Shear Tokamaks Y. Idomura, S. Tokuda, and Y. Kishimoto Y. Idomura 1), S. Tokuda 1), and.

Some results / ideas on the effect of flows D. Strintzi, C. Angioni, A. Bottino, A.G. Peeters.

GTC Status: Physics Capabilities & Recent Applications Y. Xiao for GTC team UC Irvine.

GSEP 3 rd Annual Project Meeting Zhihong Lin & US DOE SciDAC GSEP Team 8/9-8/10, 2010, GA.

Y. Kishimoto Naka Fusion Research Establishment, Japan Atomic Energy Research Institute US-Japan JIFT workshop, December 15-17, Kyoto University, Kyoto,

Intermittent Transport and Relaxation Oscillations of Nonlinear Reduced Models for Fusion Plasmas S. Hamaguchi, 1 K. Takeda, 2 A. Bierwage, 2 S. Tsurimaki,

1 / 12 Association EURATOM-CEA IAEA 20th Fusion Energy Conference presented by Ph. Ghendrih S. Benkadda, P. Beyer M. Bécoulet, G. Falchetto,

Turbulent transport in collisionless plasmas: eddy mixing or wave-particle decorrelation? Z. Lin Y. Nishimura, I. Holod, W. L. Zhang, Y. Xiao, L. Chen.

Nonlinear Frequency Chirping of Alfven Eigenmode in Toroidal Plasmas Huasen Zhang 1,2 1 Fusion Simulation Center, Peking University, Beijing , China.

Kinetic Effects on the Linear and Nonlinear Stability Properties of Field- Reversed Configurations E. V. Belova PPPL 2003 APS DPP Meeting, October 2003.

Calculations of Gyrokinetic Microturbulence and Transport for NSTX and C-MOD H-modes Martha Redi Princeton Plasma Physics Laboratory Transport Task Force.

Particle-in-Cell Simulations of Electron Transport from Plasma Turbulence: Recent Progress in Gyrokinetic Particle Simulations of Turbulent Plasmas Z.

TH/7-2 Radial Localization of Alfven Eigenmodes and Zonal Field Generation Z. Lin University of California, Irvine Fusion Simulation Center, Peking University.

Japanese Efforts on the Integrated Modeling - Part II : JAEA Contribution - T. Takizuka (JAEA) acknowledgments : T. Ozeki, N. Hayashi, N. Aiba, K. Shimizu,

Challenging problems in kinetic simulation of turbulence and transport in tokamaks Yang Chen Center for Integrated Plasma Studies University of Colorado.

Excitation of ion temperature gradient and trapped electron modes in HL-2A tokamak The 3 th Annual Workshop on Fusion Simulation and Theory, Hefei, March.

Overview of Magnetic Fusion Simulation in China J. Q. Dong Southwestern Institute of Physics China The Workshop on ITER Simulation May 15-19, 2006, Beijing,

Review of Collaboration Activities J.Q. Dong* H.D. He, Y. Shen, and A.P. Sun Southwestern Institute of Physics, China *Institute for Fusion Theory and.

ASIPP 研究生：章文扬导师：高翔，李亚东磁剪切对微观湍流作用机制的实验研究 December 8, 2009 Hefei, China.

ASIPP On the observation of small scale turbulence on HT-7 tokamak* Tao Zhang**, Yadong Li, Shiyao Lin, Xiang Gao, Junyu Zhao, Qiang Xu Institute of Plasma.

CCFE is the fusion research arm of the United Kingdom Atomic Energy Authority Internal Transport Barriers and Improved Confinement in Tokamaks (Three possible.

11 Role of Non-resonant Modes in Zonal Flows and Intrinsic Rotation Generation Role of Non-resonant Modes in Zonal Flows and Intrinsic Rotation Generation.

9 th IAEA TCM on H-mode physics and transport Catamaran Resort Hotel, Sep.24-26,2003 Y. Kishimoto Naka Fusion Research Establishment Japan Atomic Energy.

Dynamics of ITG driven turbulence in the presence of a large spatial scale vortex flow Zheng-Xiong Wang, 1 J. Q. Li, 1 J. Q. Dong, 2 and Y. Kishimoto 1.

Gyrokinetic simulation of electron turbulence spectrum

Nonlinear interactions between micro-turbulence and macro-scale MHD A. Ishizawa, N. Nakajima, M. Okamoto, J. Ramos* National Institute for Fusion Science.

(National Institute for Fusion Science, Japan)

M. Onofri, F. Malara, P. Veltri Compressible magnetohydrodynamics simulations of the RFP with anisotropic thermal conductivity Dipartimento di Fisica,

Edge and Internal Transport Barrier Formations in CHS S. Okamura, T. Minami, T. Akiyama, T. Oishi 1, A. Fujisawa, K. Ida, H. Iguchi, M. Isobe, S. Kado.

HL-2A Jiaqi Dong Southwestern Institute of Physics & Institute for Fusion Theory and Simulation, ZJU International West Lake Workshop on Fusion Theory.

U NIVERSITY OF S CIENCE AND T ECHNOLOGY OF C HINA CAS K EY L ABORATORY OF B ASIC P LASMA P HYSICS Recent experimental results of zonal flows in edge tokamak.

Kinetic MHD Simulation in Tokamaks H. Naitou, J.-N. Leboeuf †, H. Nagahara, T. Kobayashi, M. Yagi ‡, T. Matsumoto*, S. Tokuda* Joint Meeting of US-Japan.

STUDIES OF NONLINEAR RESISTIVE AND EXTENDED MHD IN ADVANCED TOKAMAKS USING THE NIMROD CODE D. D. Schnack*, T. A. Gianakon**, S. E. Kruger*, and A. Tarditi*

Chalmers University of Technology Simulations of the formation of transport barriers including the generation of poloidal spinup due to turbulence J. Weiland.

(I) Microturbulence in magnetic fusion devices – New insights from gyrokinetic simulation & theory F. Jenko, C. Angioni, T. Dannert, F. Merz, A.G. Peeters,

Multi-scale turbulence experiment in HT-7 takamak Li Yadong Li Jiangang Zhang Xiaodong Ren Zhong Zhang Tou Lin Shiyao and HT-7 Team Institute of plasma.

Integrated Simulation of ELM Energy Loss Determined by Pedestal MHD and SOL Transport N. Hayashi, T. Takizuka, T. Ozeki, N. Aiba, N. Oyama JAEA Naka TH/4-2.

Summary on transport IAEA Technical Meeting, Trieste Italy Presented by A.G. Peeters.

SMK – APS ‘06 1 NSTX Addresses Transport & Turbulence Issues Critical to Both Basic Toroidal Confinement and Future Devices NSTX offers a novel view into.

Y. Kishimoto 1,2), K. Miki 1), N. Miyato 2), J.Q.Li 1), J. Anderson 1) 21 st IAEA Fusion Energy Conference IAEA-CN-149-PD2 (Post deadline paper) October.

Simulations of turbulent plasma heating by powerful electron beams Timofeev I.V., Terekhov A.V.

TTF M. Ottaviani Euratom TORE SUPRA Overview of progress in transport theory and in the understanding of the scaling laws M. Ottaviani EURATOM-CEA,

Turbulent Convection and Anomalous Cross-Field Transport in Mirror Plasmas V.P. Pastukhov and N.V. Chudin.

21st IAEA Fusion Energy Conf. Chengdu, China, Oct.16-21, /17 Gyrokinetic Theory and Simulation of Zonal Flows and Turbulence in Helical Systems T.-H.

Simulation of Turbulence in FTU M. Romanelli, M De Benedetti, A Thyagaraja* *UKAEA, Culham Sciance Centre, UK Associazione.

IAEA-TM 02/03/2005 1G. Falchetto DRFC, CEA-Cadarache Association EURATOM-CEA NON-LINEAR FLUID SIMULATIONS of THE EFFECT of ROTATION on ION HEAT TURBULENT.

Interaction between vortex flow and microturbulence Zheng-Xiong Wang （王正汹） Dalian University of Technology, Dalian, China West Lake International Symposium.

Gyrokinetic Calculations of Microturbulence and Transport for NSTX and Alcator C-MOD H-modes Martha Redi Princeton Plasma Physics Laboratory NSTX Physics.

Plan V. Rozhansky, E. Kaveeva St.Petersburg State Polytechnical University, , Polytechnicheskaya 29, St.Petersburg, Russia Poloidal and Toroidal.

Transport Model with Global Flow M. Yagi, M. Azumi 1, S.-I. Itoh, K. Itoh 2 and A. Fukuyama 3 Research Institute for Applied Mechanics, Kyushu University.

Energetic ion excited long-lasting “sword” modes in tokamak plasmas with low magnetic shear Speaker:RuiBin Zhang Advisor:Xiaogang Wang School of Physics,

FPT Discussions on Current Research Topics Z. Lin University of California, Irvine, California 92697, USA.

An overview of turbulent transport in tokamaks

IAEA Fusion Energy Conference 2012, 8-13 Oct., San Diego, USA

Center for Plasma Edge Simulation

Investigation of triggering mechanisms for internal transport barriers in Alcator C-Mod K. Zhurovich C. Fiore, D. Ernst, P. Bonoli, M. Greenwald, A. Hubbard,

Influence of energetic ions on neoclassical tearing modes

T. Morisaki1,3 and the LHD Experiment Group

(TH/8-1, Jae-Min Kwon et al

20th IAEA Fusion Energy Conference,

T. Morisaki1,3 and the LHD Experiment Group

H. Nakano1,3, S. Murakami5, K. Ida1,3, M. Yoshinuma1,3, S. Ohdachi1,3,

Instability and Transport driven by ITG mode

Presentation transcript:

Large-scale structures in gyrofluid ETG/ITG turbulence and ion/electron transport 20 th IAEA Fusion Energy Conference, Vilamoura, Portugal, November 2004, TH/8-5Ra; TH/8-5Rb 1) Southwestern Institute of Physics (SWIP), Chengdu, P.R. China 2) Naka Fusion Research Establishment, JAERI, Japan 3) Department of Fundamental Energy, Kyoto University, Japan TH/8-5Ra: Dynamics of large-scale structure and electron transport in tokamak microturbulence simulations J. Q. Li 1,2, Y. Kishimoto 3,2, N. Miyato 2, T. Matsumoto 2, J. Q. Dong 1 TH/8-5Rb: Study of drift wave-zonal mode system based on global Landau-fluid ITG simulation in toroidal plasmas N. Miyato 2, J. Q. Li 1,2, Y. Kishimoto 3,2 Acknowledgements to: M. Azumi, Y. Idomura, M. Yagi, H. Sugama, M. Kikuchi, H. Ninomiya, SWIP, JAERI/Naka

Backgroud and motivation Different large-scale structure dynamics fluctuation (transport) suppression/enhancement Large-scale structures can be nonlinearly generated in plasma turbulence: zonal flows or streamers ► Turbulence interaction and anomalous transport is complex ► Structure formation in experiments is interesting and useful: transport barriers Our point is to: ► Study how to form different large-scale structures in plasma turbulence and their local/global characteristics ► Look for some key parameters to explore the way how we can control turbulence/transport Zonal flows and streamers are linked to low- frequency long wavelength generalized Kelvin-Helmholtz (GKH) mode Kim & Diamond

Purpose and main points Outline in this talk ► Pattern selection in ETG turbulence: zonal flows or streamers; Streamer formation and electron transport in toroidal EM ETG (TH/8-5Ra) ► Global characteristics of zonal flows in toroidal ITG turbulence and transport controlling (TH/8-5Rb) To approach the goal, two gyrofluid codes developed ► Global properties in tokamak turbulence ► Transport controlling Lin et al, GTC code; Waltz, et al, GYRO code; Dorland, et al. GS2 code; Idomura et al. GT3D code; Thyagaraja, et al. CUTIE code; …… ITG modeling seems to be successful for ion transport! Global toroidal EM ITG/MHD Jenko/Dorland ; Li/Kishimoto; Idomura; Lin; Labit/Ottaviani;….. For electron transport, may ETG, TEM or MHD activities be candidates? Local toroidal/slab EM ETG ► Basic physics of structure formation ► Key parameters to control turbulence/transport

Large-scale structures in ETG turbulence and electron transport

Structure formation via modulation in ETG Dispersion relation for GKH Gyrofluid ETG modeling 2D CHM turbulence: k xq Growth rates show global spectral structure of secondary GKH Generation of zonal flow/streamer depends on turbulence anisotropy

Pattern selection in 3D slab ETG turbulence Drift wave theory: mode width depends on magnetic shear, etc. Weak turbulence: eigenmode superpositioned Magnetic shear may govern turbulence anisotropy Almost isotropic ETG spectrum Streamers dominated ↑ Zonal flows dominated Pattern selection

Streamers in toroidal EM ETG turbulence ● 3D gyrofluid Toroidal EM ETG simulations Time evolution of turbulence Streamer is nonlinearly excited through modulation instability Electron transport Electron transport is around Gyro-Bohn level Streamer is characterized by few mode dynamics, electron transport is still low

tokamak Streamer structures in toroidal ETG After ETG saturation, streamers are formed due to the modulation instability

Global behavior of zonal flows in toroidal ITG turbulence and transport controlling

Global ITG simulation in toroidal plasmas Understand global characteristics of transport and ITB in tokamak; Explore turbulence interaction and transport controlling 5-field toroidal global Landau-fluid ITG modeling: Continuity; Vorticity; Parallel ion motion; Parallel electron motion; Ion temperature r/a Frequency [v ti /a] f GAM f sound Stationary ZF GAM N 0 / N c T 0 / T c q r/a Time (a/v ti ) Stationary ZFGAM Zonal flow evolution low q Transport Well suppressed high q Suppression Less effective Hahm, et al., PoP99

Why different characteristics for zonal flows Averaged energy balance for pressure perturbation Different role of sound wave in (1,0) pressure fluctuation relaxation Scott, et al. 03 GAM Hallatschek 04 Zonal flow saturation Stationary ZF low q high q r/a

Transport control via zonal flow behavior by q-profile r/a Frequency [v ti /a] f GAM f sound Stationary ZF GAM q-prfile governs global characteristics of zonal flows in tokamak so that transport may be controllable r/a q-profile q=1.05+2(r/a) 2 q=1.05+2(r/a) 3.5 Central q profile becomes wider Stationary zonal flow region becomes wider Averaged heat flux decreases q profile is one of the controllable parameters in experiments. To understand experimental ITB physics, new theoretical modeling and more simulations are necessary. Boundary between stationary and oscillatory (GAM) zonal flow is around f sound ~ f ZF

Conclusions Possibility to control transport through dynamics of large-scale structures, zonal flows and streamers, in tokamak is explored. ► Pattern selection of zonal flow or streamer in slab ETG depends on turbulence anisotropy, which may be determined by magnetic shear. ► Streamers are locally formed around good curvature region in toroidal ETG with higher shear, but averaged electron transport is still low. ► Stationary and oscillatory (GAM) zonal flows are simultaneously excited in central low q and edge high q regions, respectively. Transport may be controllable by adjusting profiles, like q or shear. More results in posters TH/8-5Ra: saturation mechanism of enhanced zonal flows; scaling of electron transport in weak shear ETG; intermittency in toroidal ETG turbulence;….. TH/8-5Rb: details of global simulations; energy flow channels between zonal flow and turbulence; ……..

Thank you for your attention !