Characteristics of the Hmode H and Extrapolation to ITER


 Damon Hicks
 1 years ago
 Views:
Transcription
1 Characteristics of the Hmode H Pedestal and Extrapolation to ITER The Hmode Pedestal Study Group of the International Tokamak Physics Activity presented by T.Osborne 19th IAEA Fusion Energy Conference Lyon October 2002
2 Transport simulations set a minimum T PED divertor lifetime sets a maximum W ELM Required T PED depends on transport model stiffness Q GLF23 MM95 ITER, P = 40MW AUX n fixed ped ITER Goal Melting and ablation threshold requires < 1MJ/m 2 /ELM to divertor GLF Maximum Tolerable ELM size W ELM /W ped MM J. Kinsey P109 T ped (kev) ν e * A.Loarte EX/P108, A.Leonard EX/P306
3 Pedestal and ELM characteristics from understanding of edge stability and Hmode transport barrier width Edge Stability Peeling Ballooning Mode Model Hmode Transport Barrier Width Physics based and empirical scaling Ion orbit loss region? Particle source region? ITG turbulence suppression zone? Empirical Pedestal Pressure Scaling ELM Energy Loss Connection to stability model? Transport through Hmode barrier: J.G. Cordey CT/P02
4 Intermediate n PeelingBallooning Mode Model of the Type I ELM Instability is Consistent With Observations P variation with shape in DIIID, JT 60U, and AUG consistent with edge peelingballooning stability ELM onset time consistent with predicted instability onset Fast growing low 1 < n < 30 modes are observed as Type I ELM precursors X 1.0 n = 5 q=6/5 7/5 8/5 0.5 DIII D NATIONAL FUSION FACILITY SAN DIEGO ρ
5 Both P PED And J φ PED Important in PeelingBallooning Mode Stability Boundary Higher J φ PED ( reduced shear) stabilizes high n ballooning modes (second stability) but drives intermediate n peeling modes P PED and J φ PED interact through J BOOT P.B. Snyder, TH/31 S J φ PED
6 PeelingBallooning Stability Plus Core Transport Simulations Sets Minimum Barrier Width Maximum Stable T ped (kev) T ped limits for ITER, n ped = cm 3 2nd stable Range of widths on DIIID n=30 n=20 n=15 n= pedestal width/minor radius ( /a) P.B. Snyder, TH/31 ELITE code results for simplified equilibrium and Sauter model j Boot. Stability + temperature requirement for core confinement minimum transport barrier width. Existing experiments have widths in the required range STABILITY + Q=10 MIDPLANE /a = 2.5 % STABILITY + Q=10 MIDPLANE /a = 1 %
7 Transport barrier width scalings currently either do not have a strong physics basis or are in conflict with some part of the data set Physics based approach uses result that the Hmode transport barrier represents a region where velocity shear is sufficient to quench turbulence. Extent of source region of drive for velocity shear Ion orbit loss region Neutral particle source region Region where velocity shearing rate in absence of turbulence exceeds linear growth rate of most important instability Currently no simple physics based scaling matches the data from all tokamaks well more detailed comparisons are required Empirical scaling Difficult to apply with confidence
8 Physics based empirical scaling of can give a variety of statistically equivalent results Scaling Temperature Width based on DIIID data only Scaling R β θ ρs ρ 2 ρrq 2 / 3 R 1/ 3 ε ρ θ Ion orbit loss 45 Neutral penetration 68 3 / 2 1/ n ped Physics Magnetic and flow shear stabilization Flow shear stabilization Diamagnetic stabilization T. Onjun, Phys. Plasmas Poloidal pressure σ (%)
9 Barrier width related to extent of flow shear drive from ion orbit loss? V 1/2 2(6ε/(1+ε)) ρ /a pi V jxb from return currents associated with loss of ions on orbits crossing the separatrix drives turbulencesuppressing flows Size of ion orbit loss region is about the width of a banana orbit 2 = 2 f T v TOT / Ω Pi 6ε /(1 + ε ) ρ Pi
10 (ρ P ) inconsistent results on some tokamaks DIIID Divertor Pumping Exp. PED e (T ) PED 1.0 e (T ) 0.2 PED δ e (cm) CMOD data does not scale with ρ P (p ) e PED TIME (ms) PED e (T ) 0.2 PED δ e (cm) PED (T ) e PED 0.5 (p ) e J.W. Hughes, Phys Plasmas, 9 (2002) HIGH PASS FILTER TIME (ms)
11 DENSITY WIDTH (m) Barrier width related to edge particle source? Hinton, Staebler 1 : Assuming velocity shear can take on any value consistent with radial force balance structure of particle and heat sources can control velocity shear and transport barrier width. Sep [ 2λ Ln ln( cγsepqsep)] Hmode Lmode Ohmic 1/ 2 D s (m 2 /s) D c (m 2 /s) E T i (ev) T i /T e DIII D NATIONAL FUSION FACILITY n e (ped) (10 19 m3) SAN DIEGO λ = Vn / ne σv SEP Vn 2Ti / π m i [1] Hinton, F.L., Staebler, G.M., Phys. Fluids B 5, (1993), [4] Mahdavi, M.A., et al., Nucl. Fusion 42 (2002) 52 Neutrals acquire ion velocity at separatrix (or pedestal at low density) through charge exchange R. Groebner EX/C23 # occurences per bin Density and Temperature widths correlated Te / ne
12 Edge neutral source model predicts high separatrix temperature would be required for ITER Te,Ti /a CMOD /a Neutral Penetration Model Model accounts for large widths in JT60U relative to DIIID and CMOD Pellet fueling could expand barrier /a Neutral Penetration Model Stability and Q=10 Stability and Q= SEP T i ITER (kev)
13 Scaling based on ω ExB >γ L difficult due to uncertainties in γ L in pedestal region ω ExB ζ ζ cs cs a T e ~ > γ ~ / [ (,, ) ( ) ( * )] 2 L f S α q g Z EFF h v s ci a T Ω i 3/ 2 1/ 2 Ti ρ* s f ( S, α, q) g( Z EFF ) h( v* T = e * s ρ * does not organize data well Form of f uncertain near separatrix in highly shaped plasmas. Likely to be shape dependent. Scale length for variation in shear and also possibly of Z EFF and collisionality can be O( ) which could weaken ρ * dependence and introduce other dependencies. )
14 Empirical scaling of Difficult to reconcile large widths and ρ p dependence in JT60U with β P dependence in DIIID and same relative widths between DIIID and CMOD. Add density dependence to ρ p scaling plus shape terms. * = ρ κ * s ( B T (1 + δ ) / B 0.52 Ave p ε ) n 0.19 * G * = 0.12 ρ κ * s ( B T (1 + δ ) / B 0.57 Ave p R ) a n * G
15 Pedestal pressure scaling predicts edge pressure is consistent with ITER requirements but uncertainty is high PED 2 Ballooning mode like scaling for p : β / * = ε q α( ε, κ, δ, S) Departure of PB modes from ballooning scaling determined in fit M. Sugihara, 57th Annual Meeting Phys. Soc. of Japan 100 T =5.3 kev ped ITER n ped =7x m  3 O G P ped exp (kpa) 10 1 Fit with κ, δ, A, P RMSE=3.02kPa ASDEXU JET JT60 β ped * * q (1 + δ ) (1 + κ ) = 0.12 A = ρ n 0.19 * G 0.38 * s κ ( B 0.98 T / B P (1 + δ ) ) 0.27± ε p ped = 10 4 * ρ pol / M ( n ped (1 + δ ) ) 1/ a a ( B κ p 3.81 ) A 2/ dp (( ) dr ( dp ( ) dr 0 P P 0 LH ) ) 0 4/ T B = 2µ Rq 2
16 ELM ELM size scaling Multimachine comparison more consistent with ν dependence DIIID more consistent with n/n GW Variation of W ELM at fixed parameters also a concern GLF Maximum Tolerable ELM size W ELM /W ped MM ν e * A.Loarte EX/P108 A.Leonard EX/P DIII D NATIONAL FUSION FACILITY SAN DIEGO W ELM / W PED PED e n /n GW GLF MM
17 Reduced W ELM /W PED at high n e, ν * correlated with reduced mode width from increased mode number and reduced ELITE CODE DIII D NATIONAL FUSION FACILITY SAN DIEGO Increasing ν * Sum of displacements for all m numbers n = 2 n = 5 n = ψ
18 Summary, Conclusions PB model for edge stability is consistent with experiments and imposes constraints on pedestal height, which are strong functions of pedestal width,, and plasma shape. Diamagnetic effect may raise p substantially: P.B. Snyder, TH/31 Large uncertainties in scaling make it difficult to predict pedestal temperature based on a combination of transport barrier and stability physics. The connection between mode width and ELM size is perhaps a first step to understanding ELM energy loss and suggests similar size ELMs for ITER. SOL physics may play a role, A.Loarte EX/P108. Small (Grassy, Type II) ELM or ELM free (EDA, QHmode) regimes may solve problem entirely There is still large uncertainty in the requirements for both ELM size and T PED in ITER due to differences in the predictions of the turbulent transport models
19 ELM size (energy loss) correlated with peelingballooning eigenmode radial in JT60U high trangularity discharges Giant ELMs ~ 100 Hz, small amplitude grassy ELMs ~ Hz At intermediate δ and q 95 mixtures of giant and grassy ELMs Unstable edge modes in grassy elm discharges have narrow radial mode width (ELITE Code). Changes in radial width related to difference in q profiles LL. Lao, et. al, Nucl. Fusion, (2001).
20 Diamagnetic stabilization with simple models Pedestal β Nped [β ped /(I/aB)] Impact of ω * models on ITER pedestal stability ideal (no ω * ) local ω * model modified ω * model pedestal width/minor radius ( /a) Rotation and nonideal effects expected to have significant impact Simple models give indication of the impact of diamagnetic effects Local γ MHD >ω *pi /2 Rogers & Drake suggested modification: 1/(1+1/k θ L p ) Simple models suggest significant stabilization, shift of most unstable mode to longer wavelengths (n~820)
21 ELM free Hmode with edge harmonic oscillation (EHO) has high H and no density accumulation. Counter Injection Low density with divertor pumping Large outer gap H89P to 2.4 β N to 2.9 β N H to PED Te /n GW QHMODE ELM PHASE IN QHMODE DISCHARGE TYPE I, LAST 20 % OF ELM CYCLE δ UPPER > TYPE III nped e /n GW
EFFECT OF EDGE NEUTRAL SOUCE PROFILE ON HMODE PEDESTAL HEIGHT AND ELM SIZE
EFFECT OF EDGE NEUTRAL SOUCE PROFILE ON HMODE PEDESTAL HEIGHT AND ELM SIZE T.H. Osborne 1, P.B. Snyder 1, R.J. Groebner 1, A.W. Leonard 1, M.E. Fenstermacher 2, and the DIIID Group 47 th Annual Meeting
More informationELMs and Constraints on the HMode Pedestal:
ELMs and Constraints on the HMode Pedestal: A Model Based on PeelingBallooning Modes P.B. Snyder, 1 H.R. Wilson, 2 J.R. Ferron, 1 L.L. Lao, 1 A.W. Leonard, 1 D. Mossessian, 3 M. Murakami, 4 T.H. Osborne,
More informationCharacteristics of the HMode Pedestal and Extrapolation to ITER
1 IAEACN94/CT3 Characteristics of the HMode Pedestal and Extrapolation to ITER T.H. Osborne, 1 J.G. Cordey, 2 R.J. Groebner, 1 T. Hatae, 3 A. Hubbard, 4 L.D. Horton, 5 Y. Kamada, 3 A. Kritz, 6 L.L.
More informationInfluence of Beta, Shape and Rotation on the Hmode Pedestal Height
Influence of Beta, Shape and Rotation on the Hmode Pedestal Height by A.W. Leonard with R.J. Groebner, T.H. Osborne, and P.B. Snyder Presented at FortyNinth APS Meeting of the Division of Plasma Physics
More informationTH/P84 Second Ballooning Stability Effect on Hmode Pedestal Scalings
TH/P84 Second Ballooning Stability Effect on Hmode Pedestal Scalings T. Onjun 1), A.H. Kritz ), G. Bateman ), A. Pankin ) 1) Sirindhorn International Institute of Technology, Klong Luang, Pathumthani,
More informationEdge Rotational Shear Requirements for the Edge Harmonic Oscillation in DIII D Quiescent H mode Plasmas
Edge Rotational Shear Requirements for the Edge Harmonic Oscillation in DIII D Quiescent H mode Plasmas by T.M. Wilks 1 with A. Garofalo 2, K.H. Burrell 2, Xi. Chen 2, P.H. Diamond 3, Z.B. Guo 3, X. Xu
More informationDevelopment and Validation of a Predictive Model for the Pedestal Height (EPED1)
Development and Validation of a Predictive Model for the Pedestal Height (EPED1) P.B. Snyder 1 with R.J. Groebner 1, A.W. Leonard 1, T.H. Osborne 1, M. Beurskens 3, L.D. Horton 4, A.E. Hubbard 5, J.W.
More informationMHD Analysis of the Tokamak Edge Pedestal in the Low Collisionality Regime Thoughts on the Physics of ELMfree QH and RMP Discharges
MHD Analysis of the Tokamak Edge Pedestal in the Low Collisionality Regime Thoughts on the Physics of ELMfree QH and RMP Discharges P.B. Snyder 1 Contributions from: H.R. Wilson 2, D.P. Brennan 1, K.H.
More informationGA A22443 STUDY OF H MODE THRESHOLD CONDITIONS IN DIII D
GA A443 STUDY OF H MODE THRESHOLD CONDITIONS IN DIII D by R.J. GROEBNER, T.N. CARLSTROM, K.H. BURRELL, S. CODA, E.J. DOYLE, P. GOHIL, K.W. KIM, Q. PENG, R. MAINGI, R.A. MOYER, C.L. RETTIG, T.L. RHODES,
More informationPredicting the Rotation Profile in ITER
Predicting the Rotation Profile in ITER by C. Chrystal1 in collaboration with B. A. Grierson2, S. R. Haskey2, A. C. Sontag3, M. W. Shafer3, F. M. Poli2, and J. S. degrassie1 1General Atomics 2Princeton
More informationGA A25592 STABILITY AND DYNAMICS OF THE EDGE PEDESTAL IN THE LOW COLLISIONALITY REGIME: PHYSICS MECHANISMS FOR STEADYSTATE ELMFREE OPERATION
GA A25592 STABILITY AND DYNAMICS OF THE EDGE PEDESTAL IN THE LOW COLLISIONALITY REGIME: PHYSICS MECHANISMS FOR STEADYSTATE ELMFREE OPERATION by P.B. SNYDER, K.H. BURRELL, H.R. WILSON, M.S. CHU, M.E.
More informationDependences of Critical Rotational Shear in DIIID QHmode Discharges
Dependences of Critical Rotational Shear in DIIID QHmode Discharges by T.M. Wilks 1 with K.H. Burrell 2, Xi. Chen 2, A. Garofalo 2, R.J. Groebner 2, P. Diamond 3, Z. Guo 3, and J.W. Hughes 1 1 MIT 2
More informationThe EPED Pedestal Model: Extensions, Application to ELMSuppressed Regimes, and ITER Predictions
The EPED Pedestal Model: Extensions, Application to ELMSuppressed Regimes, and ITER Predictions P.B. Snyder 1, T.H. Osborne 1, M.N.A. Beurskens 2, K.H. Burrell 1, R.J. Groebner 1, J.W. Hughes 3, R. Maingi
More informationProgress in characterization of the Hmode pedestal
Journal of Physics: Conference Series Progress in characterization of the Hmode pedestal To cite this article: A W Leonard 2008 J. Phys.: Conf. Ser. 123 012001 View the article online for updates and
More informationABSTRACT, POSTER LP1 12 THURSDAY 11/7/2001, APS DPP CONFERENCE, LONG BEACH. Recent Results from the Quiescent Double Barrier Regime on DIIID
ABSTRACT, POSTER LP1 1 THURSDAY 11/7/1, APS DPP CONFERENCE, LONG BEACH Recent Results from the Quiescent Double Barrier Regime on DIIID E.J. Doyle, K.H. Burrell, T. Casper, J.C. DeBoo, A. Garofalo, P.
More informationITER. Power and Particle Exhaust in ITER ITER
Power and Particle Exhaust in ITER ITER G. Janeschitz, C. Ibbott, Y. Igitkhanov, A. Kukushkin, H. Pacher, G. Pacher, R. Tivey, M. Sugihara, JCT and HTs San Diego.5.2 Power and Particle Exhaust in ITER
More informationGA A26891 A FIRST PRINCIPLES PREDICTIVE MODEL OF THE PEDESTAL HEIGHT AND WIDTH: DEVELOPMENT, TESTING, AND ITER OPTIMIZATION WITH THE EPED MODEL
GA A26891 A FIRST PRINCIPLES PREDICTIVE MODEL OF THE PEDESTAL HEIGHT AND WIDTH: DEVELOPMENT, TESTING, AND ITER OPTIMIZATION WITH THE EPED MODEL by P.B. SNYDER, R.J. GROEBNER, J.W. HUGHES, T.H. OSBORNE,
More informationUCLA. Broadband Magnetic and Density Fluctuation Evolution Prior to First ELM in DIIID Edge Pedestal. Presented by G. Wang a, In collaboration with
Broadband Magnetic and Density Fluctuation Evolution Prior to First ELM in DIIID Edge Pedestal Presented by G. Wang a, In collaboration with W.A. Peebles a, P.B. Snyder b, T.L. Rhodes a, E.J. Doyle a,
More informationA THEORETICAL AND EXPERIMENTAL INVESTIGATION INTO ENERGY TRANSPORT IN HIGH TEMPERATURE TOKAMAK PLASMAS
A THEORETICAL AND EXPERIMENTAL INVESTIGATION INTO ENERGY TRANSPORT IN HIGH TEMPERATURE TOKAMAK PLASMAS Presented by D.P. SCHISSEL Presented to APS Centennial Meeting March 20 26, 1999 Atlanta, Georgia
More informationLowcollisionality densitypeaking in GYRO simulations of CMod plasmas
Lowcollisionality densitypeaking in GYRO simulations of CMod plasmas D. R. Mikkelsen, M. Bitter, K. Hill, PPPL M. Greenwald, J.W. Hughes, J. Rice, MIT J. Candy, R. Waltz, General Atomics APS Division
More informationHmode performance and pedestal studies with enhanced particle control on Alcator CMod
Hmode performance and pedestal studies with enhanced particle control on Alcator CMod J.W. Hughes, B. LaBombard, M. Greenwald, A. Hubbard, B. Lipschultz, K. Marr, R. McDermott, M. Reinke, J.L. Terry
More informationDivertor Requirements and Performance in ITER
Divertor Requirements and Performance in ITER M. Sugihara ITER International Team 1 th International Toki Conference Dec. 1114, 001 Contents Overview of requirement and prediction for divertor performance
More informationPedestal Stability and Transport on the Alcator CMod Tokamak: Experiments in Support of Developing Predictive Capability
1 EX/P415 Pedestal Stability and Transport on the Alcator CMod Tokamak: Experiments in Support of Developing Predictive Capability J.W. Hughes 1, P.B. Snyder 2, X. Xu 3, J.R. Walk 1, E.M. Davis 1, R.M.
More informationIntegrated Simulation of ELM Energy Loss Determined by Pedestal MHD and SOL Transport
1 Integrated Simulation of ELM Energy Loss Determined by Pedestal MHD and SOL Transport N. Hayashi, T. Takizuka, T. Ozeki, N. Aiba, N. Oyama Japan Atomic Energy Agency, Naka, Ibarakiken, 3110193 Japan
More informationOperational Phase Space of the Edge Plasma in Alcator CMod
Operational Phase Space of the Edge Plasma in B. LaBombard, T. Biewer, M. Greenwald, J.W. Hughes B. Lipschultz, N. Smick, J.L. Terry, Team Contributed talk RO.00008 Presented at the 47th Annual Meeting
More informationGA A27433 THE EPED PEDESTAL MODEL: EXTENSIONS, APPLICATION TO ELMSUPPRESSED REGIMES, AND ITER PREDICTIONS
GA A27433 THE EPED PEDESTAL MODEL: EXTENSIONS, APPLICATION TO ELMSUPPRESSED REGIMES, AND ITER PREDICTIONS by P.B. SNYDER, T.H. OSBORNE, M.N.A. BEURSKENS, K.H. BURRELL, R.J. GROEBNER, J.W. HUGHES, R. MAINGI,
More informationModeling of ELM Dynamics for ITER
Modeling of ELM Dynamics for ITER A.Y. PANKIN 1, G. BATEMAN 1, D.P. BRENNAN 2, A.H. KRITZ 1, S. KRUGER 3, P.B. SNYDER 4 and the NIMROD team 1 Lehigh University, 16 Memorial Drive East, Bethlehem, PA 18015
More informationITER Predictions Using the GYRO Verified and Experimentally Validated TGLF Transport Model
1 THC/33 ITER Predictions Using the GYRO Verified and Experimentally Validated TGLF Transport Model J.E. Kinsey, G.M. Staebler, J. Candy, and R.E. Waltz General Atomics, P.O. Box 8608, San Diego, California
More informationUnderstanding Edge Harmonic Oscillation Physics Using NIMROD
Understanding Edge Harmonic Oscillation Physics Using NIMROD J. King With contributions from S. Kruger & A. Pankin (TechX); K. Burrell, A. Garofalo, R. Groebner & P. Snyder (General Atomics) Work supported
More informationCMod Transport Program
CMod Transport Program PAC 2006 Presented by Martin Greenwald MIT Plasma Science & Fusion Center 1/26/2006 Introduction Programmatic Focus Transport is a broad topic so where do we focus? Where CMod
More informationPedestals and Fluctuations in CMod Enhanced D α Hmodes
Pedestals and Fluctuations in Enhanced D α Hmodes Presented by A.E.Hubbard With Contributions from R.L. Boivin, B.A. Carreras 1, S. Gangadhara, R. Granetz, M. Greenwald, J. Hughes, I. Hutchinson, J. Irby,
More informationFirst Observation of ELM Suppression by Magnetic Perturbations in ASDEX Upgrade and Comparison to DIIID MatchedShape Plasmas
1 PD/11 First Observation of ELM Suppression by Magnetic Perturbations in ASDEX Upgrade and Comparison to DIIID MatchedShape Plasmas R. Nazikian 1, W. Suttrop 2, A. Kirk 3, M. Cavedon 2, T.E. Evans
More informationNew bootstrap current formula valid for steep edge pedestal, and its implication to pedestal stability
1 TH/P412 New bootstrap current formula valid for steep edge pedestal, and its implication to pedestal stability C.S. Chang 1,2, Sehoon Koh 2,*, T. Osborne 3, R. Maingi 4, J. Menard 1, S. Ku 1, Scott
More informationScaling of divertor heat flux profile widths in DIIID
1 Scaling of divertor heat flux profile widths in DIIID C.J. Lasnier 1, M.A. Makowski 1, J.A. Boedo 2, N.H. Brooks 3, D.N. Hill 1, A.W. Leonard 3, and J.G. Watkins 4 email:lasnier@llnl.gov 1 Lawrence
More informationQTYUIOP LOCAL ANALYSIS OF CONFINEMENT AND TRANSPORT IN NEUTRAL BEAM HEATED DIII D DISCHARGES WITH NEGATIVE MAGNETIC SHEAR D.P. SCHISSEL.
LOCAL ANALYSIS OF CONFINEMENT AND TRANSPORT IN NEUTRAL BEAM HEATED DIII D DISCHARGES WITH NEGATIVE MAGNETIC SHEAR Presented by D.P. SCHISSEL for the DIII D Team* Presented to 16th IAEA Fusion Conference
More informationGA A22993 EFFECTS OF PLASMA SHAPE AND PROFILES ON EDGE STABILITY IN DIII D
GA A22993 EFFECTS OF PLASMA SHAPE AND PROFILES ON EDGE by L.L. LAO, V.S. CHAN, L. CHEN, E.J. DOYLE, J.R. FERRON, R.J. GROEBNER, G.L. JACKSON, R.J. LA HAYE, E.A. LAZARUS, G.R. McKEE, R.L. MILLER, M. MURAKAMI,
More informationInvestigation of Intrinsic Rotation Dependencies in Alcator CMod
Investigation of Intrinsic Rotation Dependencies in Alcator CMod D. Kwak, A. E. White, J. E. Rice, N. T. Howard, C. Gao, M. L. Reinke, M. Greenwald, C. Angioni, R. M. McDermott, and the CMod and ASDEX
More informationParticle transport results from collisionality scans and perturbative experiments on DIIID
1 EX/P326 Particle transport results from collisionality scans and perturbative experiments on DIIID E.J. Doyle 1), L. Zeng 1), G.M. Staebler 2), T.E. Evans 2), T.C. Luce 2), G.R. McKee 3), S. Mordijck
More informationValidation of Theoretical Models of Intrinsic Torque in DIIID and Projection to ITER by Dimensionless Scaling
Validation of Theoretical Models of Intrinsic Torque in DIIID and Projection to ITER by Dimensionless Scaling by B.A. Grierson1, C. Chrystal2, W.X. Wang1, J.A. Boedo3, J.S. degrassie2, W.M. Solomon2,
More informationEdge Momentum Transport by Neutrals
1 TH/P318 Edge Momentum Transport by Neutrals J.T. Omotani 1, S.L. Newton 1,2, I. Pusztai 1 and T. Fülöp 1 1 Department of Physics, Chalmers University of Technology, 41296 Gothenburg, Sweden 2 CCFE,
More informationGA A23403 GAS PUFF FUELED H MODE DISCHARGES WITH GOOD ENERGY CONFINEMENT ABOVE THE GREENWALD DENSITY LIMIT ON DIII D
GA A23403 GAS PUFF FUELED H MODE DISCHARGES WITH GOOD ENERGY CONFINEMENT ABOVE THE GREENWALD DENSITY LIMIT ON DIII D by T.H. OSBORNE, M.A. MAHDAVI, M.S. CHU, M.E. FENSTERMACHER, R.J. La HAYE, A.W. LEONARD,
More informationRole of Magnetic Configuration and Heating Power in ITB Formation in JET.
Role of Magnetic Configuration and Heating Power in ITB Formation in JET. The JET Team (presented by V. Parail 1 ) JET Joint Undertaking, Abingdon, Oxfordshire, United Kingdom 1 present address: EURATOM/UKAEA
More informationGA A27857 IMPACT OF PLASMA RESPONSE ON RMP ELM SUPPRESSION IN DIIID
GA A27857 IMPACT OF PLASMA RESPONSE ON RMP ELM SUPPRESSION IN DIIID by A. WINGEN, N.M. FERRARO, M.W. SHAFER, E.A. UNTERBERG, T.E. EVANS, D.L. HILLIS, and P.B. SNYDER JULY 2014 DISCLAIMER This report was
More informationProgressing Performance Tokamak Core Physics. Marco Wischmeier MaxPlanckInstitut für Plasmaphysik Garching marco.wischmeier at ipp.mpg.
Progressing Performance Tokamak Core Physics Marco Wischmeier MaxPlanckInstitut für Plasmaphysik 85748 Garching marco.wischmeier at ipp.mpg.de Joint ICTPIAEA College on Advanced Plasma Physics, Triest,
More informationDEPENDENCE OF THE HMODE PEDESTAL STRUCTURE ON ASPECT RATIO
21 st IAEA Fusion Energy Conference Chengdu, China Oct. 1621, 2006 DEPENDENCE OF THE HMODE PEDESTAL STRUCTURE ON ASPECT RATIO R. Maingi 1, A. Kirk 2, T. Osborne 3, P. Snyder 3, S. Saarelma 2, R. Scannell
More informationDirect drive by cyclotron heating can explain spontaneous rotation in tokamaks
Direct drive by cyclotron heating can explain spontaneous rotation in tokamaks J. W. Van Dam and L.J. Zheng Institute for Fusion Studies University of Texas at Austin 12th USEU Transport Task Force Annual
More informationEdge Impurity Dynamics During an ELM Cycle in DIII D
Edge Impurity Dynamics During an ELM Cycle in by M.R. Wade 1 in collaboration with K.H. Burrell, A.W. Leonard, T.H. Osborne, P.B. Snyder, J.T. Hogan, 1 and D. Coster 3 1 Oak Ridge National Laboratory General
More informationITER operation. Ben Dudson. 14 th March Department of Physics, University of York, Heslington, York YO10 5DD, UK
ITER operation Ben Dudson Department of Physics, University of York, Heslington, York YO10 5DD, UK 14 th March 2014 Ben Dudson Magnetic Confinement Fusion (1 of 18) ITER Some key statistics for ITER are:
More informationTowards the construction of a model to describe the interelm evolution of the pedestal on MAST
Towards the construction of a model to describe the interelm evolution of the pedestal on MAST D. Dickinson 1,2, S. Saarelma 2, R. Scannell 2, A. Kirk 2, C.M. Roach 2 and H.R. Wilson 1 June 17, 211 1
More informationStudies of H Mode Plasmas Produced Directly by Pellet Injection in DIII D
Studies of H Mode Plasmas Produced Directly by Pellet Injection in by P. Gohil in collaboration with L.R. Baylor,* K.H. Burrell, T.C. Jernigan,* G.R. McKee, *Oak Ridge National Laboratory University of
More informationTHE DIII D PROGRAM THREEYEAR PLAN
THE PROGRAM THREEYEAR PLAN by T.S. Taylor Presented to Program Advisory Committee Meeting January 2 21, 2 3 /TST/wj PURPOSE OF TALK Show that the program plan is appropriate to meet the goals and is wellaligned
More informationUnderstanding physics issues of relevance to ITER
Understanding physics issues of relevance to ITER presented by P. Mantica IFPCNR, Euratom/ENEACNR Association, Milano, Italy on behalf of contributors to the EFDAJET Work Programme Brief summary of
More informationProgress in Modeling of ARIES ACT Plasma
Progress in Modeling of ARIES ACT Plasma And the ARIES Team A.D. Turnbull, R. Buttery, M. Choi, L.L Lao, S. Smith, General Atomics H. St John, G. Staebler C. Kessel Princeton Plasma Physics Laboratory
More informationEnhanced Energy Confinement Discharges with Lmodelike Edge Particle Transport*
Enhanced Energy Confinement Discharges with Lmodelike Edge Particle Transport* E. Marmar, B. Lipschultz, A. Dominguez, M. Greenwald, N. Howard, A. Hubbard, J. Hughes, B. LaBombard, R. McDermott, M. Reinke,
More informationPSI meeting, Aachen Germany, May 2012
Constraining the divertor heat width in ITER D.G. Whyte 1, B. LaBombard 1, J.W. Hughes 1, B. Lipschultz 1, J. Terry 1, D. Brunner 1, P.C. Stangeby 2, D. Elder 2, A.W. Leonard 3, J. Watkins 4 1 MIT Plasma
More informationMultiscale turbulence, electron transport, and Zonal Flows in DIIID
Multiscale turbulence, electron transport, and Zonal Flows in DIIID L. Schmitz1 with C. Holland2, T.L. Rhodes1, G. Wang1, J.C. Hillesheim1, A.E. White3, W. A. Peebles1, J. DeBoo4, G.R. McKee5, J. DeGrassie4,
More informationConfinement Understanding and the Extrapolation to ITER
Confinement Understanding and the Extrapolation to ITER presented by J G CORDEY in collaboration with the ITER Confinement Database and Modelling Working Group  1  Confinement Database and Modelling
More informationGA A23114 DEPENDENCE OF HEAT AND PARTICLE TRANSPORT ON THE RATIO OF THE ION AND ELECTRON TEMPERATURES
GA A311 DEPENDENCE OF HEAT AND PARTICLE TRANSPORT ON THE RATIO OF THE ION AND ELECTRON TEMPERATURES by C.C. PETTY, M.R. WADE, J.E. KINSEY, R.J. GROEBNER, T.C. LUCE, and G.M. STAEBLER AUGUST 1999 This report
More informationQTYUIOP ENERGY TRANSPORT IN NEUTRAL BEAM HEATED DIII D DISCHARGES WITH NEGATIVE MAGNETIC SHEAR D.P. SCHISSEL. Presented by. for the DIII D Team*
ENERGY TRANSPORT IN NEUTRAL BEAM HEATED DIII D DISCHARGES WITH NEGATIVE MAGNETIC SHEAR Presented by D.P. SCHISSEL for the DIII D Team* Presented to 38th APS/DPP Meeting NOVEMBER 11 15, 1996 Denver, Colorado
More informationGA A26874 ITER PREDICTIONS USING THE GYRO VERIFIED AND EXPERIMENTALLY VALIDATED TGLF TRANSPORT MODEL
GA A26874 ITER PREDICTIONS USING THE GYRO VERIFIED AND EXPERIMENTALLY VALIDATED TGLF TRANSPORT MODEL by J.E. KINSEY, G.M. STAEBLER, J. CANDY and R.E. WALTZ NOVEMBER 20 DISCLAIMER This report was prepared
More informationImpact of Toroidal Flow on ITB HMode Plasma Performance in Fusion Tokamak
Impact of oroidal Flow on I HMode Plasma Performance in Fusion okamak oonyarit Chatthong 1,*, hawatchai Onjun 1, Roppon Picha and Nopporn Poolyarat 3 1 School of Manufacturing Systems and Mechanical Engineering,
More informationPossible Experimental Tests of Pedestal Width/ Structure, Motivated by Theory/Modeling
Possible Experimental Tests of Pedestal Width/ Structure, Motivated by Theory/Modeling R.J. Groebner PERSISTENT SURVEILLANCE FOR PIPELINE PROTECTION AND THREAT INTERDICTION Presented at DIIID Pedestal
More informationAdvancing the predictive capability for pedestal structure through experiment and modeling
Advancing the predictive capability for pedestal structure through experiment and modeling Highlights from the US Fusion Energy Science FY11 Joint Research Target J.W. Hughes 1, C.S. Chang 2, R.J. Groebner
More informationSpatiotemporal investigations on the triggering of pellet induced ELMs
Spatiotemporal investigations on the triggering of pellet induced ELMs G. Kocsis, S. Kálvin, P.T. Lang*, M. Maraschek*, J. Neuhauser* W. Schneider*, T. Szepesi and ASDEX Upgrade Team KFKIRMKI, EURATOM
More informationContents. Fitting Pedestal data to a) Thermal Conduction Model. b) MHD Limit Model. Determining scaling of Core.
Contents An Analysis of the Multimachine Pedestal and Core Databases by J.G. Cordey, O. Kardaun, D.C. McDonald and members of the ITPA Pedestal and Global database groups Fitting Pedestal data to a) Thermal
More informationTriggering Mechanisms for Transport Barriers
Triggering Mechanisms for Transport Barriers O. Dumbrajs, J. Heikkinen 1, S. Karttunen 1, T. Kiviniemi, T. KurkiSuonio, M. Mantsinen, K. Rantamäki 1, S. Saarelma, R. Salomaa, S. Sipilä, T. Tala 1 EuratomTEKES
More informationCorrelations of ELM frequency with pedestal plasma characteristics
cpp header will be provided by the publisher Correlations of ELM frequency with pedestal plasma characteristics G. Kamberov 1 and L. Popova 2 1 Stevens Institute of Technology, Hoboken NJ, USA 2 Institute
More informationOV/25: Overview of Alcator CMod Results
OV/25: Overview of Alcator CMod Results Research in Support of ITER and Steps Beyond* E.S. Marmar on behalf of the CMod Team 25 th IAEA Fusion Energy Conference, Saint Petersburg, Russia, 13 October,
More informationConnections between Particle Transport and Turbulence Structures in the Edge and SOL of Alcator CMod
Connections between Particle Transport and Turbulence Structures in the Edge and SOL of Alcator CMod I. Cziegler J.L. Terry, B. LaBombard, J.W. Hughes MIT  Plasma Science and Fusion Center th 19 Plasma
More informationObservation of Reduced Core Electron Temperature Fluctuations and Intermediate Wavenumber Density Fluctuations in H and QHmode Plasmas
Observation of Reduced Core Electron Temperature Fluctuations and Intermediate Wavenumber Density Fluctuations in H and QHmode Plasmas EX/P535 L. Schmitz 1), A.E. White 1), G. Wang 1), J.C. DeBoo 2),
More informationLocal Plasma Parameters and HMode Threshold in Alcator CMod
PFC/JA9642 Local Plasma Parameters and HMode Threshold in Alcator CMod A.E. Hubbard, J.A. Goetz, I.H. Hutchinson, Y. In, J. Irby, B. LaBombard, P.J. O'Shea, J.A. Snipes, P.C. Stek, Y. Takase, S.M.
More informationPotentials, E B drifts, and uctuations in the DIIID boundary
Journal of Nuclear Materials 266±269 (1999) 1145±1150 Potentials, E B drifts, and uctuations in the DIIID boundary R.A. Moyer a, *, R. Lehmer a, J.A. Boedo a, J.G. Watkins b,x.xu c, J.R. Myra d, R. Cohen
More informationELM Suppression in DIIID Hybrid Plasmas Using n=3 Resonant Magnetic Perturbations
1 EXC/P502 ELM Suppression in DIIID Hybrid Plasmas Using n=3 Resonant Magnetic Perturbations B. Hudson 1, T.E. Evans 2, T.H. Osborne 2, C.C. Petty 2, and P.B. Snyder 2 1 Oak Ridge Institute for Science
More informationStationary, High Bootstrap Fraction Plasmas in DIIID Without Inductive Current Control
Stationary, High Bootstrap Fraction Plasmas in DIIID Without Inductive Current Control P. A. Politzer, 1 A. W. Hyatt, 1 T. C. Luce, 1 F. W. Perkins, 4 R. Prater, 1 A. D. Turnbull, 1 D. P. Brennan, 5 J.
More informationSteady State and Transient Power Handling in JET
Steady State and Transient Power Handling in JET G.F.Matthews * on behalf of the JET EFDA Exhaust Physics Task Force and JET EFDA Contributors + + See annex of J. Pamela et al, "Overview of JET Results",
More informationCharacteristics of Internal Transport Barrier in JT60U Reversed Shear Plasmas
Characteristics of Internal Transport Barrier in JT6U Reversed Shear Plasmas Y. Sakamoto, Y. Kamada, S. Ide, T. Fujita, H. Shirai, T. Takizuka, Y. Koide, T. Fukuda, T. Oikawa, T. Suzuki, K. Shinohara,
More informationDensity Peaking At Low Collisionality on Alcator CMod
Density Peaking At Low Collisionality on Alcator CMod APSDPP Meeting Philadelphia, 10/31/2006 M. Greenwald, D. Ernst, A. Hubbard, J.W. Hughes, Y. Lin, J. Terry, S. Wukitch, K. Zhurovich, Alcator Group
More informationSelfconsistent modeling of ITER with BALDUR integrated predictive modeling code
Selfconsistent modeling of ITER with BALDUR integrated predictive modeling code Thawatchai Onjun Sirindhorn International Institute of Technology, Thammasat University, Klong Luang, Pathumthani, 12121,
More informationCMod Core Transport Program. Presented by Martin Greenwald CMod PAC Feb. 68, 2008 MIT Plasma Science & Fusion Center
CMod Core Transport Program Presented by Martin Greenwald CMod PAC Feb. 68, 2008 MIT Plasma Science & Fusion Center Practical Motivations for Transport Research Overall plasma behavior must be robustly
More informationImode and Hmode plasmas at high magnetic field and pressure on Alcator CMod
Imode and Hmode plasmas at high magnetic field and pressure on Alcator CMod A. E. Hubbard, J. W Hughes, S.G. Baek, D. Brunner, I. Cziegler 1, E. Edlund, T. Golfinopoulos, M.J. Greenwald, J. Irby, B.
More informationGA A23736 EFFECTS OF CROSSSECTION SHAPE ON L MODE AND H MODE ENERGY TRANSPORT
GA A3736 EFFECTS OF CROSSSECTION SHAPE ON L MODE AND H MODE ENERGY TRANSPORT by T.C. LUCE, C.C. PETTY, and J.E. KINSEY AUGUST DISCLAIMER This report was prepared as an account of work sponsored by an
More informationTH/P614 Integrated particle simulation of neoclassical and turbulence physics in the tokamak pedestal/edge region using XGC a)
1 TH/P614 Integrated particle simulation of neoclassical and turbulence physics in the tokamak pedestal/edge region using XGC a) 1 Chang, C.S., 1 Ku, S., 2 Adams M., 3 D Azevedo, G., 4 Chen, Y., 5 Cummings,
More informationDYNAMICS OF THE FORMATION, SUSTAINMENT, AND DESTRUCTION OF TRANSPORT BARRIERS IN MAGNETICALLY CONTAINED FUSION PLASMAS
GA A23775 DYNAMICS OF THE FORMATION, SUSTAINMENT, AND DESTRUCTION OF TRANSPORT BARRIERS IN MAGNETICALLY CONTAINED FUSION PLASMAS by P. GOHIL NOVEMBER 2001 QTYUIOP DISCLAIMER This report was prepared as
More informationComparison of ITER Performance Predicted by SemiEmpirical and TheoryBased Transport Models
1 CT/P3 Comparison of ITER Performance Predicted by SemiEmpirical and TheoryBased Transport Models V. Mukhovatov 1), Y. Shimomura 1), A. Polevoi 1), M. Shimada 1), M. Sugihara 1), G. Bateman 2), J.G.
More informationStudy of B +1, B +4 and B +5 impurity poloidal rotation in Alcator CMod plasmas for 0.75 ρ 1.0.
Study of B +1, B +4 and B +5 impurity poloidal rotation in Alcator CMod plasmas for 0.75 ρ 1.0. Igor Bespamyatnov, William Rowan, Ronald Bravenec, and Kenneth Gentle The University of Texas at Austin,
More informationLH transition and pedestal studies on MAST
EXC/Ra LH transition and pedestal studies on MAST H. Meyer, M.F.M De Bock,, N.J. Conway, S.J Freethy,, K. Gibson, J. Hiratsuka, A. Kirk, C.A. Michael, T. Morgan, R. Scannell, G. Naylor, S. Saarelma,
More informationDriving Mechanism of SOL Plasma Flow and Effects on the Divertor Performance in JT60U
EX/D3 Driving Mechanism of SOL Plasma Flow and Effects on the Divertor Performance in JT6U N. Asakura ), H. Takenaga ), S. Sakurai ), G.D. Porter ), T.D. Rognlien ), M.E. Rensink ), O. Naito ), K. Shimizu
More informationSummer College on Plasma Physics August Physics of Edge Transport Barriers and Importance for Fusion Experiments
20524 Summer College on Plasma Physics 1028 August 2009 Physics of Edge Transport Barriers and Importance for Fusion Experiments Amanda E. Hubbard Plasma Science and Fusion Center, MIT USA Physics of
More informationNonlinear MHD Simulations of Edge Localized Modes in ASDEX Upgrade. Matthias Hölzl, Isabel Krebs, Karl Lackner, Sibylle Günter
Nonlinear MHD Simulations of Edge Localized Modes in ASDEX Upgrade Matthias Hölzl, Isabel Krebs, Karl Lackner, Sibylle Günter Matthias Hölzl Nonlinear ELM Simulations DPG Spring Meeting, Jena, 02/2013
More informationPossible Pedestal Transport Theory Models And Modeling Tests
Possible Pedestal Transport Theory Models And Modeling Tests J.D. Callen, University of Wisconsin, Madison, WI 537061609 DIIID Pedestal Transport Workshop, General Atomics, San Diego, CA, February 17,
More informationTOKAMAK EXPERIMENTS  Summary 
17 th IAEA Fusion Energy Conference, Yokohama, October, 1998 TOKAMAK EXPERIMENTS  Summary  H. KISHIMOTO Japan Atomic Energy Research Institute 22 UchisaiwaiCho, ChiyodaKu, Tokyo, Japan 1. Introduction
More informationOVERVIEW OF THE ALCATOR CMOD PROGRAM. IAEAFEC November, 2004 Alcator Team Presented by Martin Greenwald MIT Plasma Science & Fusion Center
OVERVIEW OF THE ALCATOR CMOD PROGRAM IAEAFEC November, 2004 Alcator Team Presented by Martin Greenwald MIT Plasma Science & Fusion Center OUTLINE CMod is compact, high field, high density, high power
More informationEffect of Variation in Equilibrium Shape on ELMing H Mode Performance in DIII D Diverted Plasmas
Effect of Variation in Equilibrium Shape on ELMing H Mode Performance in DIII D Diverted Plasmas M.E. Fenstermacher, T.H. Osborne, T.W. Petrie, C.J. Lasnier, A.W. Leonard, J.G. Watkins, 3 T.N. Carlstrom,
More informationELMs on CMod. J.W. Hughes for the Alcator CMod team. CMod/NSTX Pedestal Workshop Princeton, NJ September 7 8, 2010
ELMs on CMod J.W. Hughes for the Alcator CMod team CMod/NSTX Pedestal Workshop Princeton, NJ September 7 8, 1 EDA Hmode is supplanted by small ELMs at higher beta 7 6 5 T e ped (ev) 4 3 Unstable Stable
More informationDIII D Research in Support of ITER
Research in Support of ITER by E.J. Strait and the Team Presented at 22nd IAEA Fusion Energy Conference Geneva, Switzerland October 1318, 28 DIIID Research Has Made Significant Contributions in the Design
More informationTheory, Simulation and Modelling for the FY2011 Pedestal Milestone
Theory, Simulation and Modelling for the FY2011 Pedestal Milestone Phil Snyder for the ECC General Atomics, San Diego CA, USA ECC Conference Call August 21, 2009 Draft 2011 Theory Milestone The performance
More informationResults From Initial Snowflake Divertor Physics Studies on DIIID
Results From Initial Snowflake Divertor Physics Studies on DIIID S. L. Allen, V. A. Soukhanovskii, T.H. Osborne, E. Kolemen, J. Boedo, N. Brooks, M. Fenstermacher, R. Groebner, D. N. Hill, A. Hyatt, C.
More informationReduced Electron Thermal Transport in Low Collisionality Hmode Plasmas in DIIID and the Importance of Smallscale Turbulence
1 Reduced Electron Thermal Transport in Low Collisionality Hmode Plasmas in DIIID and the Importance of Smallscale Turbulence L. Schmitz, 1 C. Holland, 2 T.L. Rhodes, 1 G. Wang, 1 L. Zeng, 1 A.E. White,
More informationErosion and Confinement of Tungsten in ASDEX Upgrade
ASDEX Upgrade MaxPlanckInstitut für Plasmaphysik Erosion and Confinement of Tungsten in ASDEX Upgrade R. Dux, T.Pütterich, A. Janzer, and ASDEX Upgrade Team 3rd IAEAFECConference, 4.., Daejeon, Rep.
More informationDynamics of Zonal Shear Collapse in Hydrodynamic Electron Limit. Transport Physics of the Density Limit
Dynamics of Zonal Shear Collapse in Hydrodynamic Electron Limit Transport Physics of the Density Limit R. Hajjar, P. H. Diamond, M. Malkov This research was supported by the U.S. Department of Energy,
More information