NEAR-FIELD PHYSICS OF LOWER-HYBRID WAVE COUPLING TO LONG-PULSE, HIGH TEMPERATURE PLASMAS IN TORE SUPRA | PAGE 1 M. Goniche, C. C. Klepper, E. H. Martin,

Slides:

Advertisements

Similar presentations

TORE SUPRA Association EURATOM-CEA Département de Recherches sur la Fusion Contrôlée CEA - CADARACHE Saint-Paul-lez-Durance FRANCE Nonlinear LH Wave.

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.

1 G.T. Hoang TORE SUPRA Association Euratom-Cea TTF, Madison, Apr 2003 G.T. Hoang, C. Bourdelle, B. Pégourié, J. F. Artaud, J.Bucalossi, F. Clairet, C.

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

PAM experiment on FTU (EX/5-5) - 20 th FEC.Villamoura 1-6 Nov, V. Pericoli Ridolfini et al 1 LHCD and Coupling Experiments with an ITER- like PAM.

A. Kirk, 20th IAEA Fusion Energy Conference, Vilamoura, Portugal, 2004 The structure of ELMS and the distribution of transient power loads in MAST Presented.

MOSS Spectroscopy Applications in Plasma Physics John Howard Plasma Research Laboratory Australian National University.

1 G.T. Hoang, 20th IAEA Fusion Energy Conference Euratom Turbulent Particle Transport in Tore Supra G.T. Hoang, J.F. Artaud, C. Bourdelle, X. Garbet and.

Auroral dynamics EISCAT Svalbard Radar: field-aligned beam  complicated spatial structure (

HEAT TRANSPORT andCONFINEMENTin EXTRAP T2R L. Frassinetti, P.R. Brunsell, M. Cecconello, S. Menmuir and J.R. Drake.

Lecture 3: Laser Wake Field Acceleration (LWFA)

European Joint PhD Programme, Lisboa, Diagnostics of Fusion Plasmas Spectroscopy Ralph Dux.

49th Annual Meeting of the Division of Plasma Physics, November , 2007, Orlando, Florida Ion Temperature Measurements and Impurity Radiation in.

IOS-5.2 Maintaining ICRH Coupling in expected ITER regime Spokes person: M. Goniche M.-L. Mayoral (JET), R. Pinsker (DIII-D), L. Colas (TS), V. Bobkov.

D. Borba 1 21 st IAEA Fusion Energy Conference, Chengdu China 21 st October 2006 Excitation of Alfvén eigenmodes with sub-Alfvénic neutral beam ions in.

A. HerrmannITPA - Toronto /19 Filaments in the SOL and their impact to the first wall EURATOM - IPP Association, Garching, Germany A. Herrmann,

Fast imaging of global eigenmodes in the H-1 heliac ABSTRACT We report a study of coherent plasma instabilities in the H-1 plasma using a synchronous gated.

1 Garching, 20/3 2009EFDA Fuelling Meeting A Ekedahl 1, M Goniche 1, G Granucci 2, J Mailloux 3, V Pericoli 4, V Petrzilka 5, K Rantamäki 6, JET-EFDA contributors,

Nils P. Basse Plasma Science and Fusion Center Massachusetts Institute of Technology Cambridge, MA USA ABB seminar November 7th, 2005 Measurements.

Overview the CASTOR “Fast Particles” experiments A: F. Zacek 1, V. Petrzilka 1, M. Goniche 2, P. Devynck 2, J. Adamek 1 1 Association Euratom/IPP.CR, Za.

1 Association Euratom-Cea TORE SUPRA Tore Supra “Fast Particles” Experiments LH SOL Generated Fast Particles Meeting Association Euratom IPP.CR, Prague.

Profile Measurement of HSX Plasma Using Thomson Scattering K. Zhai, F.S.B. Anderson, J. Canik, K. Likin, K. J. Willis, D.T. Anderson, HSX Plasma Laboratory,

TORE SUPRA Association EURATOM-CEA Département de Recherches sur la Fusion Contrôlée CEA - CADARACHE Saint-Paul-lez-Durance FRANCE Jamie Gunn 1 Nonlinear.

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.

The study of MARFE during long pulse discharges in the HT-7 tokamak W.Gao, X.Gao, M.Asif, Z.W.Wu, B.L.Ling, and J.G.Li Institute of Plasma Physics, Chinese.

The principle of SAMI and some results in MAST 1. Institute of Plasma Physics, Chinese Academy of Sciences, Hefei, Anhui, , China 2. Culham Centre.

Recent advances in wave kinetics

Characterization of core and edge turbulence in L- and H-mode Alcator C-Mod plasmas Outline: Alcator C-Mod tokamak Fluctuation diagnostics Low to high.

Heating and Current Drive Systems for ARIES-AT T.K. Mau University of California, San Diego ARIES Project Meeting September 18-20, 2000 Princeton Plasma.

Current Drive for FIRE AT-Mode T.K. Mau University of California, San Diego Workshop on Physics Issues for FIRE May 1-3, 2000 Princeton Plasma Physics.

Fyzika tokamaků1: Úvod, opakování1 Tokamak Physics Jan Mlynář 5. Electromagnetic radiation from tokamaks Introduction, EM waves, cyclotron radiation, bremsstrahlung,

Fyzika tokamaků1: Úvod, opakování1 Tokamak Physics Jan Mlynář 8. Heating and current drive Neutral beam heating and current drive,... to be continued.

RF simulation at ASIPP Bojiang DING Institute of Plasma Physics, Chinese Academy of Sciences Workshop on ITER Simulation, Beijing, May 15-19, 2006 ASIPP.

N. Fedorczak O-26 PSI 2010 San Diego 1 Nicolas Fedorczak Poloidal mapping of turbulent transport in SOL plasmas. G. Bonhomme,

1 Instabilities in the Long Pulse Discharges on the HT-7 X.Gao and HT-7 Team Institute of Plasma Physics, Chinese Academy of Sciences, P.O.Box 1126, Hefei,

M. Ichimura, Y. Yamaguchi, R. Ikezoe, Y. Imai, T. Murakami,

Nonlinear Optics in Plasmas. What is relativistic self-guiding? Ponderomotive self-channeling resulting from expulsion of electrons on axis Relativistic.

ASIPP Long pulse and high power LHCD plasmas on HT-7 Xu Qiang.

Plasma Facing PFA Antenna Group POLITECNICO DI TORINO 19 Topical Conference on Radio Frequency Power in Plasmas June 1-3, Newport 1 Mitigation of.

DEVELOPMENT OF BETA SPECTROMETRY USING CRYOGENIC DETECTORS M. Loidl, C. Le-Bret, M. Rodrigues, X. Mougeot CEA Saclay – LIST / LNE, Laboratoire National.

A Microwave Reflectometry Based On Amplitude Modulation onHT-7 Tokamak B.L.Ling, Institute of Plasma Physics, Chinese Academy of Sciences, P.O.Box 1126,

CCFE is the fusion research arm of the United Kingdom Atomic Energy Authority Presentation on prioritisation of DIVSOL proposals for M9 Andrew Kirk.

HT-7 ASIPP The Influence of Neutral Particles on Edge Turbulence and Confinement in the HT-7 Tokamak Mei Song, B. N. Wan, G. S. Xu, B. L. Ling, C. F. Li.

D. Tskhakaya, LH SOL Generated Fast Particles Meeting IPP.CR, Prague December 16-17, 2004 Quasi-PIC modelling of electron acceleration in front of the.

1 LHCD Properties with a New Lower Hybrid Wave Antenna on HT-7 Tokamak Wei Wei,Guangli Kuang,Bojiang Ding,Weici Shen and HT-7 Team Institute of Plasma.

ASIPP, 24/ Modelling of near LH effects on the SOL, in view of extrapolation to ITER V. Petrzilka 1, G. Corrigan 2, P. Belo 3, A. Ekedahl 4, K.

Summary of RF-Related Presentations at the 2011 EPS Meeting G. Taylor NSTX Physics Meeting July 25, 2011 NSTX Supported by 1.

Association Euratom-CEA TORE SUPRA EAST, China 07/01/2010Xiaolan Zou1 Xiaolan ZOU CEA, IRFM, F Saint-Paul-Lez-Durance, France Heat and Particle Transport.

1Field-Aligned SOL Losses of HHFW Power and RF Rectification in the Divertor of NSTX, R. Perkins, 11/05/2015 R. J. Perkins 1, J. C. Hosea 1, M. A. Jaworski.

47th Annual Meeting of the Division of Plasma Physics, October 24-28, 2005, Denver, Colorado ECE spectrum of HSX plasma at 0.5 T K.M.Likin, H.J.Lu, D.T.Anderson,

HHFW heating experiments in NSTX S. Bernabei, J. Hosea, B. LeBlanc, C. K. Phillips, P. Ryan, D. Swain, J. R. Wilson and the whole NSTX crew. ORNL.

Seminar PPPL, 25 January 2011 Association Euratom-Cea 1 Interplay between neoclassical and turbulent transport on Tore Supra Acknowledgements: J. Abiteboul,

1 NSTX EXPERIMENTAL PROPOSAL - OP-XP-712 Title: HHFW Power Balance Optimization at High B Field J. Hosea, R. Bell, S. Bernabei, L. Delgado-Aparicio, S.

5.4 Stored Energy Crashes  Diamagnetic loop shows the plasma energy crashes at low plasma density  ECE signals are in phase with the energy crashes 

Nonlinear plasma-wave interactions in ion cyclotron range of frequency N Xiang, C. Y Gan, J. L. Chen, D. Zhou Institute of plasma phsycis, CAS, Hefei J.

HT-7 ASIPP Investigation on Z eff and impurities behavior with molybdenum limiter in lithium coating experiments on HT-7 tokamak Presented by Y.J.Chen.

Lower Hybrid Wave Coupling and Current Drive Experiments in HT-7 Tokamak Weici Shen Jiafang Shan Handong Xu Min Jiang HT-7 Team Institute of Plasma Physics,

57th Annual Meeting of the Division of Plasma Physics, November , Savannah, Georgia Equilibrium Reconstruction Theory and Modeling Optimized.

Member of the Helmholtz Association Meike Clever | Institute of Energy Research – Plasma Physics | Association EURATOM – FZJ Graduiertenkolleg 1203 Dynamics.

Modélisation non-linéaire des interactions ondes/plasma de bord Enabling Research CEA-05 L. COLAS (PI), L. LU, P. Tamain, IRFM E. Faudot, S. HEURAUX,

JongGab Jo, H. Y. Lee, Y. H. An, K. J. Chung and Y. S. Hwang*

Turbulence wave number spectra reconstruction

Temperature Measurements of Limiter Surfaces at High Heat Flux in the HT-7 Tokamak H. Lin, X.Z. Gong, J. Huang, J.Liu, B. Shi, X.D. Zhang, B.N. Wan,

Diagnosing kappa distribution in the solar corona with the polarized microwave gyroresonance radiation Alexey A. Kuznetsov1, Gregory D. Fleishman2 1Institute.

Ex/4-3: On the challenge of plasma heating in the JET Metallic Wall

LH Generated Hot Spots on the JET Divertor

First Experiments Testing the Working Hypothesis in HSX:

J.R. Wilson, R.J. Goldston, J.C. Hosea ReNew Theme III Workshop

Near-Field Physics of Lower-Hybrid Wave Coupling to Long-Pulse, High Temperature Plasmas in Tore Supra A dynamic Stark effect measurement performed near.

Presentation transcript:

NEAR-FIELD PHYSICS OF LOWER-HYBRID WAVE COUPLING TO LONG-PULSE, HIGH TEMPERATURE PLASMAS IN TORE SUPRA | PAGE 1 M. Goniche, C. C. Klepper, E. H. Martin, J. Hillairet, R. C. Isler, C.Bottereau, F.Clairet, L. Colas, G. Colledani, A. Ekedahl, J. H. Harris, D. L. Hillis, T. Hoang, Ph. Lotte, S. Panayotis, B. Pégourié 25th IAEA Fusion Energy Conference Saint Petersburg – October 2014

Waves have to channel efficiently and reliably through the edge plasma from the antenna to the plasma core RF WAVES FOR HEATING & CURRENT DRIVE IN NUCLEAR FUSION PLASMAS CEA | 16 OCTOBER 2014 | PAGE 2 Direct measurement of RF electric field  calibrate coupling model Electron acceleration (LH) Hot spots Wave Coupling Power handling, CD efficiency Ponderomotive forces Density depression Wave scattering, PI Spectral broadening RF sheaths (ICRF) Hot spots, Impurities This talk Electric Field Wave Spectrum FT

OUTLINE  Lower Hybrid wave coupling  Dynamic Stark effect spectroscopy diagnostic and modeling  Electric field measurements during LHCD experiments  Conclusion & Outlook | PAGE 3 CEA | 16 OCTOBER 2014 Pour personnaliser le pied de page et la date : « Insertion / En-tête et pied de page » Personnaliser la zone de de pied de page Cliquer sur appliquer partout

LOWER HYBRID WAVE COUPLING | PAGE 4 CEA | 10 AVRIL 2012

LOWER HYBRID ANTENNA FOR CURRENT DRIVE CEA | 16 OCTOBER 2014 | PAGE 5 Fourier Transform Directive (asymmetric) wave launched for Current Drive Launched Power Spectrum Parallel wave index n// P(n//) X-mode reflectometer Protection Limiter

DIRECTIVITY OF THE WAVE AFFECTS CD EFFICIENCY Depending on RF coupling conditions, wave directivity can change significantly Directivity is not measured, but derived from coupling codes | PAGE 6 CEA | 16 OCTOBER % Co-current Counter-current  From an in-situ measurement of the electric field direct estimate of the wave directivity wave index n//

DIAS DIAGNOSTIC ON TORE SUPRA | PAGE 7 CEA | 10 AVRIL 2012

PASSIVE STARK-EFFECT SPECTROSCOPY DIAGNOTIC (DIAS) SET-UP ON TORE SUPRA CEA | 16 OCTOBER 2014 | PAGE 8 B (Zeeman effect) Plasma/neutrals toroidal rotation (Döppler effect) E (Stark effect) LH Launcher Sight ranged limited by Inner Wall DIAS Endoscope Klepper, RSI14

CEA | 16 OCTOBER 2015 | PAGE 9 DYNAMIC STARK EFFECT IS FUNDAMENTALLY DIFFERENT FROM STATIC STARK EFFECT Dynamic Static e.g. for D  (n= 4  2) Martin, PhD Thesis14

PHYSICS-BASED SPECTRAL MODEL CEA | 16 OCTOBER 2014 | PAGE 10 First order time dependent perturbation (E d <50kV/cm) Time averaged emission intensity for the i k transition determined Discrete spectral line profile obtained by summing over both the i and k ind. Convolution with the instrument and radiator distribution functions  The obtained continuous spectral line profile is directly compared with the experimental measurements. Unperturbed Hamiltonian Hamiltonian associated with static B0 Hamiltonian associated with dynamic E Schrödinger equation encompasses 3 Hamiltonians Martin, submitted to PPCF

PASSIVE STARK-EFFECT SPECTROSCOPY MODELLING VS. EXPERIMENT CEA | 16 OCTOBER 2014 | PAGE 11 Modeling of the spectral data Data fits the model with Radial E LH as expected from full wave electric modelling when n e /n cut-off >>1 Full wave electric field modelling Klepper, PRL13 Fully time-dependent modelling, R.C. Isler and E.H. Martin (ORNL)

CEA | 16 OCTOBER 2014 | PAGE 12 PASSIVE STARK-EFFECT SPECTROSCOPY ESTIMATING THE EMISSION REGION Full-wave LH modelling performed with low T e 0 (~4eV) and high Te0 (T e 0~ 10eV) B2-EIRENE code Emission region is bounded by Line-of-sight (Toroidal)Atomic physics (Radial) T e 0=4eV n e 0=1x10 17 m -3c

| PAGE 13 CEA | 10 AVRIL 2012 ELECTRIC FIELD MEASUREMENTS DURING LHCD EXPERIMENTS

DENSITY PROFILES IN FRONT OF THE LHCD ANTENNA CEA | 16 OCTOBER 2014 | PAGE 14 Density profiles from X-mode reflectometer in LHCD launcher UNCERTAIN RC measurements indicate that PF are over-estimated in most cases With modelled Ponderomotive Forces (PF)  R=5mm With Pond.Forces (  R=5mm) w/o Pond.Forces Expt

CEA | 16 OCTOBER 2014 | PAGE 15 PONDEROMOTIVE FORCES ACT ON A VERY NARROW PLASMA LAYER T e 0=10eV T e 0=4eV Without Ponderomotive Forces (Linear ne profile) T e 0=4eV T e 0=10eV With Ponderomotive Forces (PF) E RF measurements confirm that PF are over-estimated in most cases E RF measurements are more consistent with model assuming low Te0 (~4eV)

CEA | 16 OCTOBER 2014 | PAGE 16 ELECTRIC FIELD MEASUREMENT POWER SCALING Expected scaling of E RF with P LH (P LH ½) No effect of the power launched by the edge waveguides (Mod.1) on Electric field map Mod.1 231data from 5 long pulses P 1/2 (10 17 m -3 ) (kV/cm L n =2mm L n =1.5mm n e 0=2 n e 0=1.5 n e 0=3

CEA | 16 OCTOBER 2014 | PAGE 17 ELECTRIC FIELD MEASUREMENT & WAVE PROPAGATION Mod.1 This experiment For low edge Te, rays from Module 1 do not contribute to <E RF Modeling Upgraded diagnostic (2016) Significant effect of Mod.1 on expected on the main N // lobe side

CEA | 16 OCTOBER 2012 | PAGE 18 CONCLUSION & OUTLOOK RF electric field near an LHCD antenna is measured by Stark effect spectroscopy in Tore Supra successfully.  Wave polarization unambiguously identified from physics-based modeling of the spectral lines.  Amplitude consistent with density profile measurements.  Good quantitative agreement with full wave modeling.  Ponderomotive forces do not act on a radial distance > 2-3mm Improved diagnostic (with He injection) will be implemented in WEST (WEST - Tungsten (W) Environment in Steady-state Tokamak, at CEA) and MPEX (Material Plasma Exposure eXperiment, at ORNL) facilities. Generalization to measure fields near ICRF antennas

EXTRA SLIDES CEA | 16 OCTOBER 2014 | PAGE 19

NON-LINEAR INTERACTION BETWEEN LH WAVE & SCRAPE-OFF LAYER CEA | 16 OCTOBER 2014 | PAGE 20 Wave scattering on density fluctuations ParametrIc Decay Cesario, PRL04 Broadening of the N// spectrum Reduced CD efficiency Madi, EPS14, submitted to NF

| PAGE 21 WEST’S RELEVANT SPECTROSCOPIC TOOLS WILL HAVE: Optical access (from high- field side !) of antenna structures Optics optimized for W I lines All part of beseline diagnostic set SHOULD HAVE: Experimental plans to relate measurements to rf-sheath interactions Erosion model including rf sheaths PROPOSING TO HAVE: “Thermal” BES Ne, Te profiles (SOL  Pedestal) X-point and Upstream SHOULD ALSO HAVE: Extra system at antenna PFC  Ne(r), Te(r) at antenna  SOL modification studies  Tie in with E RF studies (DIAS project extension) CEA | 16 OCTOBER 2014

| PAGE 22 PASSIVE STARK-EFFECT SPECTROSCOPY Stark effect Raw D  Spectral Line Profile Inboard (High B) and Outboard (Low B) Zeeman splitting can be discriminated Stark effect superimposed to Zeeman central line => modelling needed Martin, submitted to PPCF

CEA | 16 OCTOBER 2014 | PAGE 23 CONCLUSION The RF electric field near a LHCD antenna has been measured by Stark effect spectroscopy. Wave polarization is unambiguously found from physics-based modeling of the spectral lines. Amplitude of E RF is consistent with density profile measurements. E RF data are in better agreement with full wave modeling of the electric field when a low Te (~4 eV) near the antenna is considered. E RF data indicates that ponderomotive forces do not act on a radial distance exceeding 2-3mm consistently with LH coupling (and PF modeling). Further constraints on edge ne & Te are provided when changing the power feeding of the antenna.

CEA | 16 OCTOBER 2014 | PAGE 24 OUTLOOK Diagnostic will be re-directed on WEST with improved spatial resolution to view the main lobe of the N// spectrum  Higher Electric Field => More accurate measurement.  Direct measurement of the wave directivity (=> CD efficiency). Active Stark-effect spectroscopy (with He injection) is also envisaged to further improve the diagnostic. R & D is planned on the MPEX facility (ORNL) to assess the feasibility of measuring the rectified potential in front of an ICRH antenna.