N. Oyama, H. Urano, Y. Sakamoto

Slides:

Advertisements

Similar presentations

Current status of H-mode/pedestal related experiments in JT-60U 14th meeting of the ITPA-TG on Pedestal&Edge Physics Group, General Atomics, April 29-May.

Advertisements

A. Kirk, 21 st IAEA Fusion Energy Conference, Chengdu, China, October 2006 Evolution of the pedestal on MAST and the implications for ELM power loadings.

SUGGESTED DIII-D RESEARCH FOCUS ON PEDESTAL/BOUNDARY PHYSICS Bill Stacey Georgia Tech Presented at DIII-D Planning Meeting

R Sartori - page 1 20 th IAEA Conference – Vilamoura Scaling Studies of ELMy H-modes global and pedestal confinement at high triangularity in JET R Sartori.

Energy loss for grassy ELMs and effects of plasma rotation on the ELM characteristics in JT-60U N. Oyama 1), Y. Sakamoto 1), M. Takechi 1), A. Isayama.

Y. Sakamoto JAEA Japan-US Workshop on Fusion Power Plants and Related Technologies with participations from China and Korea February 26-28, 2013 at Kyoto.

Presented by Y. Kamada Large Tokamak Meeting June 2006 JT-60U contribution to ITPA/IEA inter-machine experiments and related study for ITPA/IEA.

H. Urano, H. Takenaga, T. Fujita, Y. Kamada, K. Kamiya, Y. Koide, N. Oyama, M. Yoshida and the JT-60 Team Japan Atomic Energy Agency JT-60U Tokamak: p.

H-mode characteristics close to L-H threshold power ITPA T&C and Pedestal meeting, October 09, Princeton Yves Martin 1, M.Greenwald, A.Hubbard, J.Hughes,

V. A. Soukhanovskii NSTX Team XP Review 31 January 2006 Princeton, NJ Supported by Office of Science Divertor heat flux reduction and detachment in lower.

Japan Atomic Energy Agency, Naka Fusion Institute H モード周辺プラズマの無次元量解析 Japan Atomic Energy Agency 浦野創原子力機構那珂核融合研究所.

NSTX-U NSTX-U PAC-31 Response to Questions – Day 1 Summary of Answers Q: Maximum pulse length at 1MA, 0.75T, 1 st year parameters? –A1: Full 5 seconds.

High  p experiments in JET and access to Type II/grassy ELMs G Saibene and JET TF S1 and TF S2 contributors Special thanks to to Drs Y Kamada and N Oyama.

1 Plasma Rotation and Momentum Confinement – DB ITPA - 1 October 2007 by Peter de Vries Plasma Rotation and Momentum Confinement Studies at JET P.C. de.

1 13 th ITPA Transport Physics Group Meeting Naka, 1-3 October 2007 V. Mukhovatov ITER Rotation Issues.

EFDA EUROPEAN FUSION DEVELOPMENT AGREEMENT Task Force S1 J.Ongena 19th IAEA Fusion Energy Conference, Lyon Towards the realization on JET of an.

JT-60U -1- Access to High  p (advanced inductive) and Reversed Shear (steady state) plasmas in JT-60U S. Ide for the JT-60 Team Japan Atomic Energy Agency.

CCFE is the fusion research arm of the United Kingdom Atomic Energy Authority ITB formation and evolution with co- and counter NBI A. R. Field, R. J. Akers,

PERSISTENT SURVEILLANCE FOR PIPELINE PROTECTION AND THREAT INTERDICTION International Plan for ELM Control Studies Presented by M.R. Wade (for A. Leonard)

HL-2A Heating & Current Driving by LHW and ECW study on HL-2A Bai Xingyu, HL-2A heating team.

M.F.F. Nave 1 ITPA 22 March 2010 Intrinsic Rotation in JET M. F. F. Nave 22 nd March 2010.

Improved performance in long-pulse ELMy H-mode plasmas with internal transport barrier in JT-60U N. Oyama, A. Isayama, T. Suzuki, Y. Koide, H. Takenaga,

MCZ Active MHD Control Needs in Helical Configurations M.C. Zarnstorff 1 Presented by E. Fredrickson 1 With thanks to A. Weller 2, J. Geiger 2,

11/12/2004J. Boedo APS 04 Reciprocating Probe Edge/SOL Profiles in NSTX J. Boedo H. Kugel, D. Rudakov, H. Ji, T. Carter, N. Crocker, D. Rudakov, M. Umansky,

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.

Dependence of Pedestal Structure on Ip and Bt A. Diallo, R. Maingi, S. Zweben, B.P. LeBlanc, B. Stratton, J. Menard, S. Gerhardt, J. Canick, A. McClean,

M. Greenwald, et al., APS-DPP 2006 Density Peaking At Low Collisionality on Alcator C-Mod APS-DPP Meeting Philadelphia, 10/31/2006 M. Greenwald, D. Ernst,

20th IAEA Fusion Energy Conference, 2004 Naka Fusion Research Establishment, Japan Atomic Energy Research Institute Stationary high confinement plasmas.

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

LI et al. 1 G.Q. Li 1, X.Z. Gong 1, A.M. Garofalo 2, L.L. Lao 2, O. Meneghini 2, P.B. Snyder 2, Q.L. Ren 1, S.Y. Ding 1, W.F. Guo 1, J.P. Qian 1, B.N.

Page 1 Alberto Loarte- NSTX Research Forum st - 3 rd December 2009  ELM control by RMP is foreseen in ITER to suppress or reduce size of ELM energy.

1 Peter de Vries – ITPA T meeting Culham – March 2010 P.C. de Vries 1,2, T.W. Versloot 1, A. Salmi 3, M-D. Hua 4, D.H. Howell 2, C. Giroud 2, V. Parail.

Status of NSTX/DIII-D/MAST aspect ratio core confinement comparison studies M. Peng, for E.J. Synakowski For the ITPA Transport Physics Working Group Kyota,

1 V.A. Soukhanovskii/IAEA-FEC/Oct Developing Physics Basis for the Radiative Snowflake Divertor at DIII-D by V.A. Soukhanovskii 1, with S.L. Allen.

17th ISHW Oct. 12, 2009, Princeton, NJ, USA Effect of Nonaxisymmetric Perturbation on Profile Formation I-08 T. Morisaki, Y. Suzuki, J. Miyazawa, M. Kobayashi,

1 Edge Characterization Experiment in High Performance (highly shaped) Plasmas R. J. Maqueda (Nova Photonics) R. Maingi (ORNL) V. Soukhanovskii (LLNL)

L.R. Baylor 1, N. Commaux 1, T.C. Jernigan 1, S.J. Meitner 1, N. H. Brooks 2, S. K. Combs 1, T.E. Evans 2, M. E. Fenstermacher 3, R. C. Isler 1, C. J.

Insert Chart, Photo or Image

T. Tala (JET, DIII-D), W. Solomon (DIII-D, JET, NSTX), S

Some Physics Issues Related to ITER Plasma Performance

Pedestal Confinement and Stability in JET-ILW ELMy H-modes

8th Meeting of the ITPA Confinement Database & Modeling Topical Group

High-beta Program 3 June 2002 Objective: Investigate effect of toroidal currents on high-b performance: 1. Low-iota: discharges with current ramp and constant.

Spontaneous rotation in stellarator and tokamak

11th IAEA Technical Meeting on H-mode Physics and Transport Barriers" , September, 2007 Tsukuba International Congress Center "EPOCHAL Tsukuba",

ELM Control in Application of Non-Axisymmetric Magnetic Perturbations

Andrew Kirk on behalf of

Pellet injection in ITER Model description Model validation

Center for Plasma Edge Simulation

Reduction of ELM energy loss by pellet injection for ELM pacing

L-H power threshold and ELM control techniques: experiments on MAST and JET Carlos Hidalgo EURATOM-CIEMAT Acknowledgments to: A. Kirk (MAST) European.

2/13 Introduction Knowledge of the influence of the hydrogen isotope on H-mode confinement is essential for accurately projecting the energy confinement.

Comparison of Small ELM regimes A C-MOD/MAST/NSTX Multi-machine ITPA proposal Question: Is the NSTX Type V ELMy H-mode the same as a high  EDA H-mode.

A.D. Turnbull, R. Buttery, M. Choi, L.L Lao, S. Smith, H. St John

More on Pedestal and ELMs

Progress on the application of ELM control schemes to ITER scenarios from the non-active phase to DT operation Alberto Loarte G. Huijsmans, S. Futatani,

Diagnosis of Pellet Induced Bootstrap Current with Alfvén Cascades

TC-2 – Power ratio April 2011, San Diego

T. Morisaki1,3 and the LHD Experiment Group

Edge pedestal physics and its implications for ITER

Wide-Pedestal QH-mode Initiated and Sustained with Zero Injected NBI torque throughout, and Sustained with Dominant Electron Heating (77% ECH power) Achieved.

Suppression of ELM’s is a major issue for ITER and beyond

Density Peaking in JET (NBI fueling dominant) and DIII-D (transport dominant) Originates from Different Sources at Low υ* For the first time electron particle.

Max-Planck Institut für Plasmaphysik Garching

EX/2-5: Plasma shape and fueling dependence on the small ELMs regime in TCV and AUG B. Labit et al. A transition from Type-I to Type-II/grassy ELMs is.

Continued exploration of pedestal structure and edge relaxation mechanisms at lower edge collisionality J.W. Hughes, A. Hubbard, B. LaBombard, J. Terry,

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,

No ELM, Small ELM and Large ELM Strawman Scenarios

Presentation transcript:

N. Oyama, H. Urano, Y. Sakamoto 14th meeting of the ITPA-TG on Pedestal&Edge Physics Group, General Atomics, April 29-May 2, 2008 Effect of edge plasma rotation on pedestal and ELMs ~ preparation for DIII-D/JT-60U exp. ~ N. Oyama, H. Urano, Y. Sakamoto and the JT-60 Team JAEA Naka

Background for PEP-17/18 Pedestal pressure and type I ELM characteristics vary with edge plasma rotation. These rotation effects can be separated from effects of TF ripple. (Urano IAEA 2006, NF 47(2007)706) Grassy ELM frequency varies with edge plasma rotation. (Oyama, PPCF 49(2007)249) Small plasma rotation in ITER is expected. To obtain better prediction of ITER pedestal parameters (especially ELM size), it is important to understand the physical mechanism of rotation effects. => Inter-machine experiments between DIII-D and JT-60U (PEP-17/18) will provide new information, making use of good capability of toroidal torque input in both devices.

Configurations for rotation effects for type I ELM ~1% ripple for grassy ELM Ferritic Steel Tile for type I ELM ~0.5% ripple for QH-mode

Rotation effect on type I ELMs At fixed Pnet, pped gradually decreases with increasing ctr-VT At fixed Psep (Pnet~1.5xPLH), fELM increases with increasing ctr-VT 2 4 6 pped [kPa] -1 1 VTPED [105m/s] co-NBI with FST bal-NBI with FST ctr-NBI with FST Pnet~6.5MW Fixed Pnet 20 40 60 80 100 -1 1 VTped [105m/s] fELM [Hz] co-NBI with FST co-NBI w/o FST bal-NBI with FST bal-NBI w/o FST ctr-NBI with FST ctr-NBI w/o FST Psep = 5MW, ne = 2x1019m-3 Fixed Psep

Rotation effect on type I ELMs At fixed Pnet, pped gradually decreases with increasing ctr-VT At fixed Psep (Pnet~1.5xPLH), fELM increases with increasing ctr-VT Degradation of pped in ctr-rotating plasma is smaller than reduction of DWELM at higher fELM => smaller DWELM/Wped These results are obtained at 1% ripple case in large VP config. 2 4 6 pped [kPa] -1 1 VTPED [105m/s] co-NBI with FST bal-NBI with FST ctr-NBI with FST Pnet~6.5MW Fixed Pnet Fixed Psep 2 4 6 8 10 -1 1 VTPED [105m/s] DWELM / Wped [%] Psep = 5MW, ne = 2x1019m-3 co-NBI with FST co-NBI w/o FST bal-NBI with FST bal-NBI w/o FST ctr-NBI with FST ctr-NBI w/o FST

Moderate TF ripple case (~0.5%) pped can increase with heating power (bp) At fixed Pnet, pped decreases with increasing ctr-rotation DWELM/Wped decreases with increasing ctr-rotation Similar changes in 1% ripple case were observed. co-NBI with FST bal-NBI with FST ctr-NBI with FST 5.7-6MW 10MW co-NBI with FST bal-NBI with FST ctr-NBI with FST

Rotation effect on grassy ELMs Grassy ELMs can be obtained at zero rotation & rotation shear Not only high q95 (>6), rotation effect can be observed in moderate q95 (≤5) Sign of rotation seems to be important, similar to type I ELM

Rotation effect on grassy ELMs Grassy ELMs can be obtained at zero rotation & rotation shear Not only high q95 (>6), rotation effect can be observed in moderate q95 (≤5) Sign of rotation seems to be important, similar to type I ELM In high d configuration, no degradation of pped was observed

Difference between grassy ELM&QH Grassy ELM: Localized collapse near pedestal top QH-mode: No collapse. EHO seen in Te, ne, Is ~18%

Proposal for DIII-D as PEP-17/18 For the comparison of pedestal & H-mode performance, and ELM characteristics, Rotation/beta scan at different plasma configuration (low d, high d, DN) (Similar q95 and ne* regime to JT-60U database) Discussions Possibility to get similar plasma shape for each target example type I ELM: d~0.35, k~1.4 grassy ELM: d~0.6, k~1.4 Possibility for reversed Ip/Bt for larger CTR torque If yes, may be suitable to perform QH-mode comparison experiments in DIII-D (PEP-14)