Influence of Beta, Shape and Rotation on the Hmode Pedestal Height


 Lee Johnathan Burke
 8 months ago
 Views:
Transcription
1 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 Orlando, Florida November 12 16, 27
2 Pedestal Height is Greatest Uncertainty in Predicting Tokamak Performance P ped (kpa) T e,ped (kev) p Ped. Width SOL Pedestal sets boundary condition for core transport For stiff transport, core profiles strongly dependent on pedestal Pedestal uncertainty for ITER corresponds to a wide range of performance; Q= Separatrix ψ N Uncertainty
3 Pedestal Width is key to Pedestal Height Scaling Validated edge stability model can predict pedestal top pressure if width is known Pedestal pressure height increases with improved edge stability Pedestal pressure increase with global and stronger shaping No change with toroidal rotation Stability model utilized to extract pedestal width Greater accuracy than directly measured width Pedestal width increases with higher pedestal pressure Pedestal pressure rise double expected from stability with fixed width Pedestal models predict an ion gyroradius, *, width scaling, yet Width correlated with pressure ( 12 ) ped No T i ( *) dependence
4 Validated MHD Stability Model a Tool for Extracting Pedestal Width from Pedestal Pressure DIIID Stability Study: Fixed parameters; I p, B t, Shape, pedestal width, etc. Pedestal Te (kev) The peelingballooning model has been validated over a range of conditions Stability model predicts pedestal pressure for a given width Stability model can extract width from a measured pedestal pressure Pedestal top more accurately measured than gradient and width Pedestal Density (1 19 m 3 ) [P.B. Snyder, H.R. Wilson, et al., PPCF 46 (24) A131 ]
5 Pedestal Pressure Increases with Global Beta I p, P inj (MA, MW) Density (1 19 m 3 ) Pe,ped(kPa) 1.4 Plasma Current β N =β/ 3 I/ab β N Density Pedestal Electron Pressure Injected Power/ Time (msec) Power scan for N =2. to N =3. Other parameters fixed; shape, q 95, density, etc. Pedestal pressure increases with N
6 Pedestal Profiles Fit Just Prior to an ELM n e (1 2 m 3 ) T e (kev) T i (kev) ψ Profiles fit to data combined from the last 2% of many ELM cycles Hyperbolic tangent fit to profiles Pedestal height more certain, 51% Width/gradient less certain, ~2% T i pedestal is usually significantly wider than T e or n e Ion pressure width set by density width Pedestal pressure characterizes pedestal height for comparison with stability analysis
7 Pedestal Pressure Increases with N Pressure (kpa) Total pedestal pressure increases ~5% as N increases from b N =2. b N =2.5 b N =2.8 b N = ψ N Pedestal Pressure (kpa) Both electron and ion pedestal pressure increase Total Pressure Electron Pressure Ion Pressure Global Beta ( β N )
8 Both Pressure Gradient and Width Increase with N Pressure Gradient ( dp/dψ n ) Pedestal Width (Δψ n ) Pressure Gradient Pedestal Width Electrons Ions Ions Electrons Both gradients and widths increase with N Larger uncertainty, ~2%, for gradient and width measurements Stability constraint applied to pressure can reduce uncertainty in pedestal width scaling Global Beta ( β N )
9 Stability Space is Mapped for Each Configuration Average Pedestal Current Density Instability Growth Rate Operating Point Unstable Stable Normalized Peak Pressure Gradient (α) γ E /ω*/ MHD equilibria constructed by measured pressure profile and Sauter bootstrap model for edge current Create 2D array of equilibria with varying pedestal current and pressure Fixed pedestal width Fixed total stored energy Stability analysis of each equilibrium using ELITE, n=525 Stability threshold: E *2 Variation in stability threshold analyzed for varying global, shape, etc.
10 Pressure Gradient Limit for Fixed Width Increases with Global Stability Contours for N Variation with Fixed Width Average Pedestal Current Density β N =2. β N =2.5 β N =3. β N =3.5 Stable β N =2. Operating Point Unstable Normalized Peak Pressure Gradient (α) Stability dependence on calculated using fixed pedestal width but varying total stored energy Calculated gradient limit increases with due to Shafranov shift
11 Improved Stability at Fixed Pedestal Width Can Account for Half of Pedestal Pressure Rise with N Pedestal Pressure (kpa) Pedestal Height Measured Pedestal Pressure Fixed Width Stability Limit Measured pedestal pressure proportional to global N Increase in stability limit at fixed pedestal width accounts for only half of observed increase in P ped with N Width must increase with to account for pedestal pressure increase Global Beta (β N )
12 Pedestal Gradient Expected to be Weakly Reduced with Increasing Width Pped Limit (kpa) Pedestal Pressure Previous numerical studies indicate width ( ) scaling of stability limit: p crit 14 or P ped 34 All other parameters fixed; Shape,, etc. Width variation of p due to radial extent of finite n modes Pedestal Width (% of Flux) [P.B. Snyder, H.R. Wilson, et al., PPCF 46 (24) A131 ]
13 Stability Analysis Implies Pedestal Width Increase with Pedestal Pressure (kpa) Pedestal Height Measured Pedestal Pressure Global Beta ( β N ) 1/2 Dµb ped Stability Limit Fixed Width Stability Limit Pedestal pressure proportional to global N Width must increase with to account for measured pressure increase Width scaling consistent with previous statistical study 12 ped T.H. Osborne, et. al., Jour. Nucl. Mater., , 131 (1999)
14 Similar Dependence of P ped on global N Observed in High Advanced Tokamak Regime Pressure (kpa) Temperature (kev) High scenario with early heating Increase in N from 2.2 to 3.7, ~68% Total Pressure β N =2.2 β N =3.7 Pedestal T e Pedestal pressure rises from 9.8 kpa to 15.5 kpa, ~58% Density (1 2 m 3 ) Temperature (kev) Pedestal n e Pedestal T i
15 Pedestal Width Scales with in Advanced Regimes Average Pedestal Current Density Fixed Pedestal Width Stability Limit β N =2.2 Operating Point β N =2. β N =2.5 β N =3. β N =3.5 β N = Normalized Peak Pressure Gradient (α) Pedestal Pressure (kpa) Pedestal Height 1/2 Dµb ped Stability Limit Measured Pedestal Pressure Fixed Width Stability Limit Global Beta ( β N ) Pedestal stability continues to improve over wide range of 12 Pedestal width scaling,, consistent with pressure increase ped
16 Shape an Important Factor for Pedestal Height Shape dependence for pedestal and core confinement long observed Stronger shaping improves edge stability Elongation, triangularity, squareness, second separatrix, etc. Contribution of stability to increased pedestal for stronger shaping not generally quantified Stronger shaping leads to higher stability limit and wider pedestal
17 Shaping Can Produce Wide Range of Pedestal Heights Pressure (kpa) Temperature (kev) Constant conditions ELMing Hmode N =2. q 95 =4.6 Ip=1.1 MA Bt= 1.9T, ±1% to match q Total Pressure <δ>=.25 <δ>=.48 Pedestal T e Density (1 2 m 3 ) Temperature (kev) Pedestal n e Pedestal T i < >=.25 : P ped =8.1 kpa < >=.48 : P ped =14. kpa Global Energy Confinement: ~5% higher
18 Pedestal Width Increases with Stronger Shaping Average Pedestal Current Density Stability Contours for Fixed Width <δ>=.25 <δ>=.48 <δ>=.25 Operating Point Low δ High δ Normalized Peak Pressure Gradient (α) Stronger shaping raises pedestal pressure 72% Stability limit increases ~33% assuming fixed width Width increase of 31% for 12 scaling yields ped Expected increase in P ped of 75%, in agreement with experiment
19 Moderate Changes to ITER Shape Can Significantly Affect Pedestal Squareness scan about the proposed ITER shape kpa kev Measured Pedestal Profiles in ELMing Hmode Total Pressure ζ=.32 ζ=.35 ζ=.41 Pedestal Te kev 1 2 m Pedestal ne Pedestal Ti
20 Pedestal Width Decreases with Squareness Pedestal Pressure (kpa) Pedestal Height versus Squareness Measured Pedestal Pressure Fixed Width Limit Width ~ β Ped 1/2 Limit Squareness (z) Pedestal pressure increases ~5% from highest to lowest squareness Improved stability for fixed width can account for half of pedestal pressure increase 12 ped Pedestal width consistent with pressure variation
21 Toroidal Rotation does not Significantly Affect Pedestal Height km/s Rotation Scan in Hybrid Configuration Carbon Toroidal Rotation Cntr 6.5 MW 1 Cntr 7.8 MW 2 Cntr 9.2 MW kpa Total Pressure Ratio of co to counter NBI to control rotation While central confinement degraded with counter injection pedestal pressure not significantly affected Previous stability studies in this parameter regime indicate edge stability limit not modified by toroidal rotation [P.B. Snyder, et al., Nucl. Fusion 47 (27) 961 ]
22 Implications for Pedestal Width Scaling Significant gyroradius dependence expected if width set where ExB velocity shearing exceeds driftwave growth rate.5 2. [ f( S,,q)gZ ( eff )h( * )] Complicated dependence on other dimensionless parameters 12 ped Possible pedestal width scaling mechanisms: ped correlation with *: Improved stability leads to higher T i ped correlation with other parameters: S,, etc.
23 GyroRadius Scaling Not Yet Observed Pressure (kpa) Temperature (kev)2.5 Total Pressure Low Density High Density Pedestal T e Density (1 2 m 3 ) Temperature (kev)2.5 Pedestal n e Pedestal T i * reduced, but pedestal not narrower Other dimensionless parameters change; collisionality, shear, etc. The * pedestal width scaling is critical If *, ITER likely not to achieve its mission Current experiments cannot match ITER * Experiments in DIIID, JT6U and CMod have not found significant * scaling A 12 pedestal scaling ped consistent with single parameter scans in DIIID and JT6U T.H. Osborne, et. al., Jour. Nucl. Mater., , 131 (1999)
24 Summary Pedestal pressure increases with improved edge stability Increase twice that expected for fixed pedestal width 12 Pedestal width increase, ped, consistent with stability analysis and observed pressure variation Pedestal height and width not dependent on toroidal rotation Consistent with stability analysis Future work to isolate underlying physics of width scaling Universality of 1/2 ped scaling for pedestal width Ion gyroradius, * Other dimensionless parameters; S,, q, etc.
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 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 informationCharacteristics of the Hmode H and Extrapolation to ITER
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
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 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 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 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 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 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 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 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 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 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 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 informationGlobal stabilization effect of Shafranov shift on the edge pedestal plasmas in JET and JT60U
26 th IAEA Fusion Energy Conference Kyoto, Japan, 1722 October 216 IAEACN23/EX/3 Global stabilization effect of Shafranov shift on the edge pedestal plasmas in JET and JT6U H. Urano 1, S. Saarelma
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 informationHmode Pedestal Enhancement and Improved Confinement in DIIID with Lithium Injection
Hmode Pedestal Enhancement and Improved Confinement in DIIID with Lithium Injection by G.L. Jackson, with R. Maingi, T.H. Osborne, D.K. Mansfield, C.P. Chrobak, B.A. Grierson, A.G. McLean, Z. Yan, S.L.
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 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 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 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 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 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 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 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 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 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 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 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 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 informationSummary of CDBM Joint Experiments
11th Meeting of the ITPA CDBM TG, Chengdu, 2324 Oct. 2006 Summary of CDBM Joint Experiments Mon. 23 Oct, morning T. Takizuka (JAEA) CDB2: Confinement scaling in ELMy Hmodes; β degradation C.C. Petty
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 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 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 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 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 informationDependence of Achievable β N on Discharge Shape and Edge Safety Factor in DIII D SteadyState Scenario Discharges
Dependence of Achievable β N on Discharge Shape and Edge Safety Factor in DIII D SteadyState Scenario Discharges by J.R. Ferron with T.C. Luce, P.A. Politzer, R. Jayakumar, * and M.R. Wade *Lawrence Livermore
More informationW.M. Solomon 1. Presented at the 54th Annual Meeting of the APS Division of Plasma Physics Providence, RI October 29November 2, 2012
Impact of Torque and Rotation in High Fusion Performance Plasmas by W.M. Solomon 1 K.H. Burrell 2, R.J. Buttery 2, J.S.deGrassie 2, E.J. Doyle 3, A.M. Garofalo 2, G.L. Jackson 2, T.C. Luce 2, C.C. Petty
More informationScaling of Hmode Pedestal and ELM Characteristics in the JET and DIIID Tokamaks
1 Scaling of Hmode Pedestal and ELM Characteristics in the JET and DIIID Tokamaks T.H. Osborne 1, M.N.A. Beurskens 2, L.D. Horton 3, L. Frassinetti 4, R.J. Groebner 1, A.W. Leonard 1, P. Lomas 2, I Nunes
More informationGA A26565 LIMITS TO HMODE PEDESTAL PRESSURE GRADIENT IN DIIID
GA A26565 LIMITS TO HMODE PEDESTAL PRESSURE GRADIENT IN DIIID by R.J. GROEBNER, P.B. SNYDER, T.H. OSBORNE, A.W. LEONARD, T.L. RHODES, L. ZENG, E.A. UNTERBERG, Z. YAN, G.R. McKEE, C.J. LASNIER, J.A. BOEDO,
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 informationHIGH PERFORMANCE EXPERIMENTS IN JT60U REVERSED SHEAR DISCHARGES
HIGH PERFORMANCE EXPERIMENTS IN JTU REVERSED SHEAR DISCHARGES IAEACN9/EX/ T. FUJITA, Y. KAMADA, S. ISHIDA, Y. NEYATANI, T. OIKAWA, S. IDE, S. TAKEJI, Y. KOIDE, A. ISAYAMA, T. FUKUDA, T. HATAE, Y. ISHII,
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 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 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 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 informationCorrelation between the edge and the internal transport barriers in JT60U
EX/P33 Correlation between the edge and the internal transport barriers in JTU Y. Kamada, M. Yoshida, Y. Sakamoto, Y. Koide, N. Oyama, H. Urano, K. Kamiya T. Suzuki, A. Isayama, and the JT Team Japan
More informationGA A27437 SCALING OF THE DIVERTOR HEAT FLUX WIDTH IN THE DIIID TOKAMAK
GA A27437 SCALING OF THE DIVERTOR HEAT FLUX WIDTH IN THE DIIID TOKAMAK by M.A. MAKOWSKI, A.W. LEONARD, J.D. ELDER, C.J. LASNIER, J. NICHOLS, T.H. OSBORNE, P.C. STANGEBY and J.G. WATKINS OCTOBER 2012 DISCLAIMER
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 informationRelating the LH Power Threshold Scaling to Edge Turbulence Dynamics
Relating the LH Power Threshold Scaling to Edge Turbulence Dynamics Z. Yan 1, G.R. McKee 1, J.A. Boedo 2, D.L. Rudakov 2, P.H. Diamond 2, G. Tynan 2, R.J. Fonck 1, R.J. Groebner 3, T.H. Osborne 3, and
More informationGA A25229 FINAL REPORT ON THE OFES ELM MILESTONE FOR FY05
GA A25229 ELM MILESTONE FOR FY05 by D.P. BRENNAN, E.D. HELD, S.E. KRUGER, A.Y. PANKIN, D.D. SCHNACK, AND C.R. SOVINEC APRIL 2006 DISCLAIMER This report was prepared as an account of work sponsored by an
More informationIntegrated Simulation of ELM Energy Loss and Cycle in Improved Hmode Plasmas
1 Integrated Simulation of ELM Energy Loss and Cycle in Improved Hmode Plasmas N. Hayashi 1), T. Takizuka 1), N. Aiba 1), N. Oyama 1), T. Ozeki 1), S. Wiesen 2), V. Parail 3) 1) Japan Atomic Energy Agency,
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 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 informationDevelopment of a Systematic, Selfconsistent Algorithm for the KDEMO Steadystate Operation Scenario
Development of a Systematic, Selfconsistent Algorithm for the KDEMO Steadystate Operation Scenario J.S. Kang 1, J.M. Park 2, L. Jung 3, S.K. Kim 1, J. Wang 1, D. H. Na 1, C.S. Byun 1, Y. S. Na 1, and
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 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 informationEvolution of the pedestal on MAST and the implications for ELM power loadings
Evolution of the pedestal on MAST and the implications for ELM power loadings Presented by Andrew Kirk EURATOM / UKAEA Fusion Association UKAEA authors were funded jointly by the United Kingdom Engineering
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 informationarxiv: v1 [physics.plasmph] 24 Nov 2017
arxiv:1711.09043v1 [physics.plasmph] 24 Nov 2017 Evaluation of ideal MHD mode stability of CFETR baseline scenario Debabrata Banerjee CAS Key Laboratory of Geospace Environment and Department of Modern
More informationThe Hmode pedestal structure and its role on confinement in JET with a carbon and metal wall
The Hmode pedestal structure and its role on confinement in JET with a carbon and metal wall M.J. Leyland 1, M.N.A. Beurskens 2, L. Frassinetti 3, C. Giroud 2, S. Saarelma 2, P.B. Snyder 4, J. Flanagan
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 informationAdvanced Tokamak Research in JT60U and JT60SA
I07 Advanced Tokamak Research in and JT60SA A. Isayama for the JT60 team 18th International Toki Conference (ITC18) December 912, 2008 Ceratopia Toki, Toki Gifu JAPAN Contents Advanced tokamak development
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 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 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 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 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 informationMinimal Model Study for ELM Control by Supersonic Molecular Beam Injection and Pellet Injection
25 th Fusion Energy Conference, Saint Petersburg, Russia, 2014 TH/P29 Minimal Model Study for ELM Control by Supersonic Molecular Beam Injection and Pellet Injection Tongnyeol Rhee 1,2, J.M. Kwon 1, P.H.
More informationMHD stability analysis of diagnostic optimized configuration shots in JET
INSTITUTE OF PHYSICS PUBLISHING Plasma Phys. Control. Fusion 7 () 7 7 PLASMA PHYSICS AND CONTROLLED FUSION doi:.88/7/7// MHD stability analysis of diagnostic optimized configuration shots in JET. Introduction
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 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 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 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 informationOverview of Tokamak Rotation and Momentum Transport Phenomenology and Motivations
Overview of Tokamak Rotation and Momentum Transport Phenomenology and Motivations Lecture by: P.H. Diamond Notes by: C.J. Lee March 19, 2014 Abstract Toroidal rotation is a key part of the design of ITER
More informationPartially Coherent Fluctuations in Novel High Confinement Regimes of a Tokamak
Partially Coherent Fluctuations in Novel High Confinement Regimes of a Tokamak István Cziegler UCSD, Center for Energy Research Center for Momentum Transport and Flow Organization Columbia Seminar Feb
More informationAnalysis and modelling of MHD instabilities in DIIID plasmas for the ITER mission
Analysis and modelling of MHD instabilities in DIIID plasmas for the ITER mission by F. Turco 1 with J.M. Hanson 1, A.D. Turnbull 2, G.A. Navratil 1, C. PazSoldan 2, F. Carpanese 3, C.C. Petty 2, T.C.
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 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 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 informationPROGRESS TOWARDS SUSTAINMENT OF ADVANCED TOKAMAK MODES IN DIIIÐD *
PROGRESS TOWARDS SUSTAINMENT OF ADVANCED TOKAMAK MODES IN DIIIÐD * B.W. RICE, K.H. BURRELL, J.R. FERRON, C.M. GREENFIELD, G.L. JACKSON, L.L. LAO, R.J. LA HAYE, T.C. LUCE, B.W. STALLARD, E.J. STRAIT, E.J.
More informationPredictive Study on High Performance Modes of Operation in HL2A 1
1 EX/P0 Predictive Study on High Performance Modes of Oration in HLA 1 Qingdi GAO 1), R. V. BUDNY ), Fangzhu LI 1), Jinhua ZHANG 1), Hongng QU 1) 1) Southwestern Institute of Physics, Chengdu, Sichuan,
More informationHigh fusion performance at high T i /T e in JETILW baseline plasmas with high NBI heating power and low gas puffing
High fusion performance at high T i /T e in JETILW baseline plasmas with high NBI heating power and low gas puffing HyunTae Kim, A.C.C. Sips, C. D. Challis, F. Rimini, L. Garzotti, E. Lerche, L. Frassinetti,
More informationCritical Physics Issues for DEMO
MaxPlanckInstitut für Plasmaphysik Critical Physics Issues for DEMO L.D. Horton with thanks to the contributors to the EFDA DEMO physics tasks in 2006 and to D.J. Campbell, who organized this effort
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 informationImpact of High Field & High Confinement on LmodeEdge Negative Triangularity Tokamak (NTT) Reactor
Impact of High Field & High Confinement on LmodeEdge Negative Triangularity Tokamak (NTT) Reactor M. Kikuchi, T. Takizuka, S. Medvedev, T. Ando, D. Chen, J.X. Li, M. Austin, O. Sauter, L. Villard, A.
More informationSTATIONARY, HIGH BOOTSTRAP FRACTION PLASMAS IN DIIID WITHOUT INDUCTIVE CURRENT CONTROL
th IAEA Fusion Energy Conference Vilamoura, Portugal, to 6 November IAEACN6/EX/P7 STATIONARY, HIGH BOOTSTRAP FRACTION PLASMAS IN DIIID WITHOUT INDUCTIVE CURRENT CONTROL P.A. POLITZER, A.W. HYATT, T.C.
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 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 informationCharacterization of neoclassical tearing modes in highperformance I mode plasmas with ICRF mode conversion flow drive on Alcator CMod
1 EX/P422 Characterization of neoclassical tearing modes in highperformance I mode plasmas with ICRF mode conversion flow drive on Alcator CMod Y. Lin, R.S. Granetz, A.E. Hubbard, M.L. Reinke, J.E.
More informationTHE ADVANCED TOKAMAK DIVERTOR
I Department of Engineering Physics THE ADVANCED TOKAMAK DIVERTOR S.L. Allen and the team 14th PSI QTYUIOP MA D S O N UCLAUCLA UCLA UNIVERSITY OF WISCONSIN THE ADVANCED TOKAMAK DIVERTOR S.L. Allen and
More informationDimensionless Identity Experiments in JT60U and JET
1 IAEACN116/IT/12 Dimensionless Identity Experiments in JT60U and JET G Saibene 1, N Oyama 2, Y Andrew 3, JG Cordey 3, E de la Luna 4, C Giroud 3, K Guenther 3, T Hatae 2, GTA Huysmans 5, Y Kamada
More informationConfinement and edge studies towards low ρ* and ν* at JET
1 Confinement and edge studies towards low ρ* and ν* at JET I Nunes 1,2, P J Lomas 3, D C McDonald 3, G Saibene 4, R Sartori 4, I Voitsekhovitch 3, M Beurskens 3, G Arnoux 3, A Boboc 3, T Eich 5, C Giroud
More informationRecent Development of LHD Experiment. O.Motojima for the LHD team National Institute for Fusion Science
Recent Development of LHD Experiment O.Motojima for the LHD team National Institute for Fusion Science 4521 1 Primary goal of LHD project 1. Transport studies in sufficiently high n E T regime relevant
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 informationExtension of HighBeta Plasma Operation to Low Collisional Regime
EX/44 Extension of HighBeta Plasma Operation to Low Collisional Regime Satoru Sakakibara On behalf of LHD Experiment Group National Institute for Fusion Science SOKENDAI (The Graduate University for
More informationGA A26887 ADVANCES TOWARD QHMODE VIABILITY FOR ELMFREE OPERATION IN ITER
GA A26887 ADVANCES TOWARD QHMODE VIABILITY FOR ELMFREE OPERATION IN ITER by A.M. GAROFALO, K.H. BURRELL, M.J. LANCTOT, H. REIMERDES, W.M. SOLOMON and L. SCHMITZ OCTOBER 2010 DISCLAIMER This report was
More informationScaling of divertor plasma effectiveness for reducing targetplate heat flux
Scaling of divertor plasma effectiveness for reducing targetplate heat flux T.D. Rognlien, I. Joseph, G.D. Porter, M.E. Rensink, M.V. Umansky, LLNL S.I. Krasheninnikov & A.Yu. Pigarov, UCSD; M. Groth,
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 information