Verification & Validation: application to the TORPEX basic plasma physics experiment


 Martin Carroll
 1 years ago
 Views:
Transcription
1 Verification & Validation: application to the TORPEX basic plasma physics experiment Paolo Ricci F. Avino, A. Bovet, A. Fasoli, I. Furno, S. Jolliet, F. Halpern, J. Loizu, A. Mosetto, F. Riva, C. Theiler, C. Wersal Centre de Recherches en Physique des Plasmas École Polytechnique Fédérale de Lausanne, Switzerland What does Verification & Validation mean? What is TORPEX? And the simulation code we use? What verification methodology did we use? and validation methodology? What have we learned?
2 Verification & Validation REALITY MEASUREMENT VALIDATION EXPERIMENT COMPUTATION ANALYSIS SIMULATION CODE DISCRETIZATION & CODING MODEL VERIFICATION
3 Verification & Validation REALITY MEASUREMENT VALIDATION EXPERIMENT COMPUTATION ANALYSIS SIMULATION CODE DISCRETIZATION & CODING MODEL VERIFICATION
4 The TORPEX device
5 The TORPEX device
6 The TORPEX device
7 The TORPEX device
8 The TORPEX device
9 Key elements of the TORPEX device Plasma gradients Source (EC and UH resonance) Parallel losses Magnetic curvature
10 TORPEX: an ideal verification & validation testbed  Complete set of diagnostics, full plasma imaging possible  Parameter scan, N number of field line turns Example: N=2
11 Verification & Validation REALITY MEASUREMENT VALIDATION EXPERIMENT COMPUTATION ANALYSIS SIMULATION CODE DISCRETIZATION & CODING MODEL VERIFICATION
12 Properties of TORPEX turbulence n fluc ~ n eq L eq ~ L fluc L >> " i Collisional
13 The model Collisional Plasma Braginskii model ρ i << L, ω << Ω ci, β << 1 Electrostatic Driftreduced Braginskii equations Convection n T e, Ω (vorticity) V e, V i! "2! = # Magnetic curvature similar equations parallel momentum balance Parallel dynamics Quasi steady state balance between: plasma source, perpendicular transport, and parallel losses Source t +[φ,n]=ĉ(nt e) nĉ(φ) (nv e )+S
14 Verification & Validation REALITY MEASUREMENT VALIDATION EXPERIMENT COMPUTATION ANALYSIS SIMULATION CODE DISCRETIZATION & CODING MODEL VERIFICATION
15 Theof GBS code, aturbulence tool to simulate line turbulenc GBS: simulation plasma in open edgefield conditions Developed by steps of increasing complexity Limited SOL Limited SOL ITERlike SOL Driftreduced Braginskii equations Global, 3D, Fluxdriven, Fulln LAPD, UCLA HelCat, UNM J. Loizu et al. 13 / 24 TORPEX, CRPP [Ricci et al PPCF 2012] The role of the sheath in magnetized plasma fluid turbulence Helimak, UTexas
16 3D and 2D GBS simulations Fully 3D version 2D version (k =0 hypothesis) z r z r
17 Verification & Validation REALITY MEASUREMENT VALIDATION EXPERIMENT COMPUTATION ANALYSIS SIMULATION CODE DISCRETIZATION & CODING MODEL VERIFICATION
18 Code verification, the techniques 1) Simple tests 2) Codetocode comparisons (benchmarking) 3) Discretization error quantification 4) Convergence tests 5) Orderofaccuracy tests NOT RIGOROUS RIGOROUS, requires analytical solution Only verification ensuring convergence and correct numerical implementation
19 Orderofaccuracy tests, method of manufactured solution A(f) =0 Our model:, f unknown? We solve A n (f n )=0, but n = f n f = Method of manufactured solution: 1) we choose g, then For GBS: h 2 ɛ 10 5 S = A(g) 2) we solve: A n (g n ) S =0 n = g n g n T v,i v,e ω Φ h = x/ x 0 = y/ y 0 =( t/ t 0 ) 2
20 Verification & Validation REALITY MEASUREMENT VALIDATION EXPERIMENT COMPUTATION ANALYSIS SIMULATION CODE DISCRETIZATION & CODING MODEL VERIFICATION
21 Our project, paradigm of turbulence code validation TORPEX? 3D GBS model 2D reduced model What is the agreement of experiment and simulations as a function of N? Is 3D necessary? What can we learn on TORPEX physics from the validation?
22 The validation methodology [Based on ideas of Terry et al., PoP 2008; Greenwald, PoP 2010] What quantities can we use for validation? The more, the better  Definition & evaluation of the validation observables What are the uncertainties affecting measured and simulation data?  Uncertainty analysis For one observable, within its uncertainties, what is the level of agreement?  Level of agreement for an individual observable How directly can an observable be extracted from simulation and experimental data? How worthy is it, i.e. what should be its weight in a composite metric?  The observable hierarchy How to evaluate the global agreement and how to interpret it  Composite metric
23 Definition of the validation observables? Common quantities Isat Vfloat IV Probe model, assumptions Validation observables Probe model, assumptions to be compared  Examples: Isat t, n t, Γ,...  A validation observable should not be a function of the others  Quantities to predict should be included among the observables n Te ϕ V i V e
24 Evaluation of the validation observables We evaluate 11 observables: Examples n [m 3 ] low N n(r) t T e (r) t I sat (r) t δi sat /I sat k v PDF(I sat )... experiment 3D 2D δi sat /I sat high N low N high N
25 Experiment Uncertainty analysis x 2 = x 2 fit + x 2 prb + x 2 rep + x 2 fin Simulation IV Fitting Probe properties, measurement uncertainties Plasma reproducibility Finite statistics y 2 = y 2 num + y 2 inp + y 2 fin Numerics Input parameters  scan in resistivity and boundary conditions Finite statistics
26 Agreement with respect to an individual observable Distance: Experimental measurements d = Average over all points 1 G G i=1 (x i y i ) 2 x 2 i + y2 i Simulation results Normalization to uncertainties Level of agreement: R = tanh[(d d 0)/λ]+1 2 R DISAGREEMENT AGREEMENT WITHIN UNCERTAINTY d 0 =1.5 λ = d AGREEMENT
27 Observable hierarchy Not all the observables are equally worthy The hierarchy assesses the assumptions used for their deduction h exp : h sim : # of assumptions to get the observable from experimental data same for simulation results h = h exp + h sim Examples:  n : h exp = 1, h sim t = 0, h = 1 Γ Isat  : h exp = 2, h sim = 1, h = 3
28 Composite metric Level of agreement R j = tanh[(d j d 0 )/λ]+1 2 Sum over all the observables Hierarchy level H j =1/(h j + 1) Sensitivity Normalization:  χ = 0: perfect agreement  χ = 0.5: agreement within uncertainty  χ = 1: total disagreement 28
29 The validation results 1 Complete disagreement 0.8 2D simulations D simulations Agreement within uncertainty N Perfect agreement Why 2D and 3D work equally well at low N and 2D fails at high N? What can we learn on the TORPEX physics?
30 Flute instabilities  ideal interchange mode k =0 n + T e eqs. Vorticity eq. 2 φ t i = 2B cm i Rn p e y p e t = c B [φ,p e] γ p e = ik y p e0c φ/b γ = γ I γ I = c s 2 L p R Compressibility stabilizes the mode at k v ρ s > 0.3γ I R/c s
31 Anatomy of a k =0 perturbation N =2 = L v /N L v λ v : longest possible vertical wavelength of a perturbation If k =0 then λ v = = L v N
32 TORPEX shows k =0 turbulence at low N! k =0 (λ v = L v /N ) Ideal interchange regime L v λ v L v λ v = N N
33 ! For N~16, ideal!! k =0! interchange modes dominant! N=2!
34 Turbulence changes character at N>7! 8 k =0 L v λ v k =0 WHY? (λ v = L v ) 0 λ v = L v N
35 At high N>7, Resistive Interchange Mode turbulence Toroidally symmetric λ v L v Introducing modes k =0 k stabilization, requires high N and η =0 γ 2 = γ 2 I γ 4πV 2 A k2 η c 2 k 2 y, γ I = c s 2 RL p
36 Why does TORPEX transition from ideal to resistive interchange for large N? N! Resistive interchange requires high N Ideal interchange requires low N: λ v = L v N thus k v = 2πN L v stable: k v ρ s > 0.3Rγ I /c s Threshold: N~10 in TORPEX
37 Interpretation of the validation results D D N k =0  Ideal interchange turbulence  2D model appropriate k =0  Resistive interchange turbulence  2D model not appropriate
38 Where can a verification & validation exercise help? 1. Make sure that the code works correctly Correct GBS implementation, rigorously, discretization error estimate 2. Compare codes 2D and 3D simulations agree with experimental measurements similarly at low N. Global 3D simulations are needed to describe the plasma dynamics at high N. 3. Let the physics emerge Two turbulent regimes: ideal interchange mode at low N and nonflute modes at high N. Parameter scans have a crucial role 4. Assess the predictive capabilities of a code 3D simulations predict (within uncertainty) profiles of n but not of I sat 38
39 What comes next?  Validation at each code refinement  Considering more observables  Involving more codes Limited SOL LAPD, UCLA HelCat, UNM TORPEX, CRPP Helimak, UTexas ITERlike SOL
40 What comes next? Validation on a recently achieved SOLlike configuration in TORPEX Limited SOL LAPD, UCLA HelCat, UNM TORPEX, CRPP Helimak, UTexas ITERlike SOL
41 Where can a verification & validation exercise help? 1. Make sure that the code works correctly Rigorously, with discretization error estimate 2. Compare codes 2D and 3D simulations agree with experimental measurements similarly at low N. Global 3D simulations are needed to describe the plasma dynamics at high N. 3. Let the physics emerge Two turbulent regimes: ideal interchange mode at low N and nonflute modes at high N. Parameter scans have a crucial role 4. Assess the predictive capabilities of a code 3D simulations predict (within uncertainty) profiles of n but not of I sat 41
42 Future work Missing ingredients for a complete description Use of more diagnostics: Mach probes, Triple probes or Bdot probes to compare other of plasma dynamics in TORPEX: interesting observables. Better source modeling Physics of neutrals Better boundary conditions 42
43 V&V A validation project requires a four step procedure: (i) Model qualification (ii) Code verification (iii) Definition and classification of observables (iv) Quantification of agreement 43
44
A kinetic neutral atom model for tokamak scrapeoff layer tubulence simulations. Christoph Wersal, Paolo Ricci, Federico Halpern, Fabio Riva
A kinetic neutral atom model for tokamak scrapeoff layer tubulence simulations Christoph Wersal, Paolo Ricci, Federico Halpern, Fabio Riva CRPP  EPFL SPS Annual Meeting 2014 02.07.2014 CRPP The tokamak
More informationImpact of neutral atoms on plasma turbulence in the tokamak edge region
Impact of neutral atoms on plasma turbulence in the tokamak edge region C. Wersal P. Ricci, F.D. Halpern, R. Jorge, J. Morales, P. Paruta, F. Riva Theory of Fusion Plasmas Joint VarennaLausanne International
More informationComparison of Kinetic and Extended MHD Models for the Ion Temperature Gradient Instability in Slab Geometry
Comparison of Kinetic and Extended MHD Models for the Ion Temperature Gradient Instability in Slab Geometry D. D. Schnack University of Wisconsin Madison Jianhua Cheng, S. E. Parker University of Colorado
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 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 informationLowfrequency linearmode regimes in the tokamak scrapeoff layer
Lowfrequency linearmode regimes in the tokamak scrapeoff layer Annamaria Mosetto, Federico D. Halpern, Sébastien Jolliet, and Paolo Ricci Citation: Phys. Plasmas 19, 112103 (2012); doi: 10.1063/1.4758809
More informationHeat Transport in a Stochastic Magnetic Field. John Sarff Physics Dept, UWMadison
Heat Transport in a Stochastic Magnetic Field John Sarff Physics Dept, UWMadison CMPD & CMSO Winter School UCLA Jan 510, 2009 Magnetic perturbations can destroy the nestedsurface topology desired for
More informationToroidal confinement devices
Toroidal confinement devices Dr Ben Dudson Department of Physics, University of York, Heslington, York YO10 5DD, UK 24 th January 2014 Dr Ben Dudson Magnetic Confinement Fusion (1 of 20) Last time... Power
More informationFluctuation statistics in the scrapeoff layer of Alcator CMod
Fluctuation statistics in the scrapeoff layer of Alcator CMod R. Kube, O. E. Garcia, B. LaBombard, and J. L. Terry We study long time series of the ion saturation current and floating potential, obtained
More informationGyrokinetic Transport Driven by Energetic Particle Modes
Gyrokinetic Transport Driven by Energetic Particle Modes by Eric Bass (General Atomics) Collaborators: Ron Waltz, Ming Chu GSEP Workshop General Atomics August 10, 2009 Outline I. Background Alfvén (TAE/EPM)
More informationINTRODUCTION TO GYROKINETIC AND FLUID SIMULATIONS OF PLASMA TURBULENCE AND OPPORTUNITES FOR ADVANCED FUSION SIMULATIONS
INTRODUCTION TO GYROKINETIC AND FLUID SIMULATIONS OF PLASMA TURBULENCE AND OPPORTUNITES FOR ADVANCED FUSION SIMULATIONS G.W. Hammett, Princeton Plasma Physics Lab w3.pppl.gov/ hammett Fusion Simulation
More informationProduction of Overdense Plasmas by Launching. 2.45GHz Electron Cyclotron Waves in a Helical Device
Production of Overdense Plasmas by Launching 2.45GHz Electron Cyclotron Waves in a Helical Device R. Ikeda a, M. Takeuchi a, T. Ito a, K. Toi b, C. Suzuki b, G. Matsunaga c, S. Okamura b, and CHS Group
More informationEnergetic particle modes: from bump on tail to tokamak plasmas
Energetic particle modes: from bump on tail to tokamak plasmas M. K. Lilley 1 B. N. Breizman 2, S. E. Sharapov 3, S. D. Pinches 3 1 Physics Department, Imperial College London, London, SW7 2AZ, UK 2 IFS,
More informationNonlinear MHD Modelling of Rotating Plasma Response to Resonant Magnetic Perturbations.
Nonlinear MHD Modelling of Rotating Plasma Response to Resonant Magnetic Perturbations. M. Becoulet 1, F. Orain 1, G.T.A. Huijsmans 2, P. Maget 1, N. Mellet 1, G. DifPradalier 1, G. Latu 1, C. Passeron
More informationDivertor Detachment on TCV
Divertor Detachment on TCV R. A. Pitts, Association EURATOMConfédération Suisse,, CH LAUSANNE, Switzerland thanks to A. Loarte a, B. P. Duval, J.M. Moret, J. A. Boedo b, L. Chousal b, D. Coster c, G.
More informationEffect of ExB Driven Transport on the Deposition of Carbon in the Outer Divertor of. ASDEX Upgrade
Association EuratomTekes ASDEX Upgrade Effect of ExB Driven Transport on the Deposition of Carbon in the Outer Divertor of ASDEX Upgrade L. AhoMantila 1,2, M. Wischmeier 3, K. Krieger 3, V. Rohde 3,
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 informationModels for Global Plasma Dynamics
Models for Global Plasma Dynamics F.L. Waelbroeck Institute for Fusion Studies, The University of Texas at Austin International ITER Summer School June 2010 Outline 1 Models for LongWavelength Plasma
More informationMagnetic reconnection, merging flux ropes, 3D effects in RSX
Magnetic reconnection, merging flux ropes, 3D effects in RSX T. Intrator P24 I. Furno, E. Hemsing, S. Hsu, + many students G.Lapenta, P.Ricci T15 Plasma Theory Second Workshop on Thin Current Sheets
More informationPhysics basis for similarity experiments on power exhaust between JET and ASDEX Upgrade with tungsten divertors
Physics basis for similarity experiments on power exhaust between JET and ASDEX Upgrade with tungsten divertors S. Wiesen, T. Eich, M. Bernert, S. Brezinsek, C. Giroud, E. Joffrin, A. Kallenbach, C. Lowry,
More informationMHD RELATED TO 2FLUID THEORY, KINETIC THEORY AND MAGANETIC RECONNECTION
MHD RELATED TO 2FLUID THEORY, KINETIC THEORY AND MAGANETIC RECONNECTION Marty Goldman University of Colorado Spring 2017 Physics 5150 Issues 2 How is MHD related to 2fluid theory Level of MHD depends
More informationIntroduction to Fusion Physics
Introduction to Fusion Physics Hartmut Zohm MaxPlanckInstitut für Plasmaphysik 85748 Garching DPG Advanced Physics School The Physics of ITER Bad Honnef, 22.09.2014 Energy from nuclear fusion Reduction
More informationGyrokinetic Turbulence Simulations at High Plasma Beta
Gyrokinetic Turbulence Simulations at High Plasma Beta Moritz J. Pueschel Thanks to F. Jenko and M. Kammerer Ringberg Theory Meeting, Nov. 18, 2008 1 Motivation 2 3 The Beta Parameter Definition β β e
More informationTokamak Edge Turbulence background theory and computation
ASDEX Upgrade Tokamak Edge Turbulence background theory and computation B. Scott Max Planck Institut für Plasmaphysik Euratom Association D85748 Garching, Germany Krakow, Sep 2006 Outline Basic Concepts
More informationActive and Fast Particle Driven Alfvén Eigenmodes in Alcator CMod
Active and Fast Particle Driven Alfvén Eigenmodes in Alcator CMod JUST DID IT. J A Snipes, N Basse, C Boswell, E Edlund, A Fasoli #, N N Gorelenkov, R S Granetz, L Lin, Y Lin, R Parker, M Porkolab, J
More informationBeams and magnetized plasmas
Beams and magnetized plasmas 1 JeanPierre BOEUF LAboratoire PLAsma et Conversion d Energie LAPLACE/ CNRS, Université Paul SABATIER, TOULOUSE Beams and magnetized plasmas 2 Outline Ion acceleration and
More informationHybrid Simulations: Numerical Details and Current Applications
Hybrid Simulations: Numerical Details and Current Applications Dietmar KraussVarban and numerous collaborators Space Sciences Laboratory, UC Berkeley, USA Boulder, 07/25/2008 Content 1. Heliospheric/Space
More informationDivertor power deposition and target current asymmetries during typei ELMs in ASDEX Upgrade and JET
Journal of Nuclear Materials 363 365 (2007) 989 993 www.elsevier.com/locate/jnucmat Divertor power deposition and target current asymmetries during typei ELMs in ASDEX Upgrade and JET T. Eich a, *, A.
More informationTurbulence bursts probing of transport barriers analyzed in terms of competing stochastic processes
Author manuscript, published in "Plasma Phys. Control. Fusion 55, 9 (013) 09501" DOI : 10.1088/0713335/55/9/09501 Turbulence bursts probing of transport barriers analyzed in terms of competing stochastic
More informationMomentum transport from magnetic reconnection in laboratory an. plasmas. Fatima Ebrahimi
Momentum transport from magnetic reconnection in laboratory and astrophysical plasmas Space Science Center  University of New Hampshire collaborators : V. Mirnov, S. Prager, D. Schnack, C. Sovinec Center
More informationLecture notes on Waves/Spectra Noise, Correlations and.
Lecture notes on Waves/Spectra Noise, Correlations and. References: Random Data 3 rd Ed, Bendat and Piersol,Wiley Interscience Beall, Kim and Powers, J. Appl. Phys, 53, 3923 (982) W. Gekelman Lecture 6,
More informationMeasuring from electron temperature fluctuations in the Tokamak Fusion Test Reactor
PHYSICS OF PLASMAS VOLUME 5, NUMBER FEBRUARY 1998 Measuring from electron temperature fluctuations in the Tokamak Fusion Test Reactor C. Ren, a) J. D. Callen, T. A. Gianakon, and C. C. Hegna University
More informationRotation and Neoclassical Ripple Transport in ITER
Rotation and Neoclassical Ripple Transport in ITER Elizabeth J. Paul 1 Matt Landreman 1 Francesca Poli 2 Don Spong 3 Håkan Smith 4 William Dorland 1 1 University of Maryland 2 Princeton Plasma Physics
More informationConditions for diffusive penetration of plasmoids across magnetic barriers
Abstract Contribution to the 12 th ICPP, NICE, 2529 October 2004 Conditions for diffusive penetration of plasmoids across magnetic barriers N. Brenning, T. Hurtig, and M. A. Raadu Alfvén Laboratory, Royal
More informationAdvances in stellarator gyrokinetics
Advances in stellarator gyrokinetics Per Helander and T. Bird, F. Jenko, R. Kleiber, G.G. Plunk, J.H.E. Proll, J. Riemann, P. Xanthopoulos 1 Background Wendelstein 7X will start experiments in 2015 optimised
More informationTokamak Fusion Basics and the MHD Equations
MHD Simulations for Fusion Applications Lecture 1 Tokamak Fusion Basics and the MHD Equations Stephen C. Jardin Princeton Plasma Physics Laboratory CEMRACS 1 Marseille, France July 19, 21 1 Fusion Powers
More informationEXAMINATION QUESTION PAPER
Faculty of Science and Technology EXAMINATION QUESTION PAPER Exam in: Fys2009 Introduction to Plasma Physics Date: 20161202 Time: 09.0013.00 Place: Åsgårdvegen 9 Approved aids: Karl Rottmann: Matematisk
More informationParticle Transport and Density Gradient Scale Lengths in the Edge Pedestal
Particle Transport and Density Gradient Scale Lengths in the Edge Pedestal W. M. Stacey Fusion Research Center, Georgia Institute of Technology, Atlanta, GA, USA Email: weston.stacey@nre.gatech.edu Abstract
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 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 informationThe RFP: Plasma Confinement with a Reversed Twist
The RFP: Plasma Confinement with a Reversed Twist JOHN SARFF Department of Physics University of WisconsinMadison Invited Tutorial 1997 Meeting APS DPP Pittsburgh Nov. 19, 1997 A tutorial on the Reversed
More informationThe FieldReversed Configuration (FRC) is a highbeta compact toroidal in which the external field is reversed on axis by azimuthal plasma The FRC is
and Stability of FieldReversed Equilibrium with Toroidal Field Configurations Atomics General Box 85608, San Diego, California 921865608 P.O. APS Annual APS Meeting of the Division of Plasma Physics
More informationA firstprinciples selfconsistent model of plasma turbulence and kinetic neutral dynamics in the tokamak scrapeoff layer
A firstprinciples selfconsistent model of plasma turbulence and kinetic neutral dynamics in the tokamak scrapeoff layer C Wersal and P Ricci Ecole Polytechnique Fédérale de Lausanne (EPFL), Swiss Plasma
More informationLecture IV: Magnetized plasma stability
Outline Lecture IV: Magnetized plasma stability Wojciech Fundamenski UKAEA Fusion, Culham Science Centre, Abingdon and Plasma Physics Group, Imperial College, London 22nd May 2009 Outline Part I: 1 Hydrodynamic
More informationarxiv: v1 [physics.plasmph] 14 Jan 2009
arxiv:0901.2043v1 [physics.plasmph] 14 Jan 2009 Effectsofparallel ion motion onzonal flowgeneration in iontemperaturegradient mode turbulence J. Anderson 1, J. Li, Y. Kishimoto Department of Fundamental
More informationOn the Nature of ETG Turbulence and CrossScale Coupling
J. Plasma Fusion Res. SERIES, Vol. Vol. 6 6 (2004) (2004) 11 16 000 000 On the Nature of ETG Turbulence and CrossScale Coupling JENKO Frank MaxPlanckInstitut für Plasmaphysik, EURATOMAssociation, D85748
More informationarxiv:physics/ v1 [physics.plasmph] 5 Nov 2004
Ion Resonance Instability in the ELTRAP electron plasma G. Bettega, 1 F. Cavaliere, 2 M. Cavenago, 3 A. Illiberi, 1 R. Pozzoli, 1 and M. Romé 1 1 INFM Milano Università, INFN Sezione di Milano, Dipartimento
More informationIntroduction to Magnetohydrodynamics (MHD)
Introduction to Magnetohydrodynamics (MHD) Tony Arber University of Warwick 4th SOLARNET Summer School on Solar MHD and Reconnection Aim Derivation of MHD equations from conservation laws Quasineutrality
More information14. Energy transport.
Phys780: Plasma Physics Lecture 14. Energy transport. 1 14. Energy transport. ChapmanEnskog theory. ([8], p.5175) We derive macroscopic properties of plasma by calculating moments of the kinetic equation
More informationdown distribution. The present study is dedicated to the transport of fast particles produced by usual core plasma microinstabilities, like ion temper
Gyrokinetic calculations of diffusive and convective transport of ff particles with a slowing down distribution function C. Angioni and A.G. Peeters y MaxPlanckInstitut für Plasmaphysik, IPPEURATOM
More informationDPG School The Physics of ITER Physikzentrum Bad Honnef, Energy Transport, Theory (and Experiment) Clemente Angioni
MaxPlanckInstitut für Plasmaphysik DPG School The Physics of ITER Physikzentrum Bad Honnef, 23.09.2014 Energy Transport, Theory (and Experiment) Clemente Angioni Special acknowledgments for material
More informationMagnetic Deflection of Ionized Target Ions
Magnetic Deflection of Ionized Target Ions D. V. Rose, A. E. Robson, J. D. Sethian, D. R. Welch, and R. E. Clark March 3, 005 HAPL Meeting, NRL Solid wall, magnetic deflection 1. Cusp magnetic field imposed
More informationElectromagneic Waves in a non Maxwellian Dusty Plasma
Electromagneic Waves in a non Maxwellian Dusty Plasma Nazish Rubab PhD student, KF University Graz IWFOEAW Graz 26 January, 2011 Layout Dusty Plasma NonMaxwellian Plasma Kinetic Alfven Waves Instability
More informationIntegration of Fokker Planck calculation in full wave FEM simulation of LH waves
Integration of Fokker Planck calculation in full wave FEM simulation of LH waves O. Meneghini S. Shiraiwa R. Parker 51 st DPP APS, Atlanta November 4, 29 L H E A F * Work supported by USDOE awards DEFC299ER54512
More informationLow Temperature Plasma Technology Laboratory
Low Temperature Plasma Technology Laboratory Equilibrium theory for plasma discharges of finite length Francis F. Chen and Davide Curreli LTP6 June, Electrical Engineering Department Los Angeles, California
More informationLangmuir Probes as a Diagnostic to Study Plasma Parameter Dependancies, and Ion Acoustic Wave Propogation
Langmuir Probes as a Diagnostic to Study Plasma Parameter Dependancies, and Ion Acoustic Wave Propogation Kent Lee, Dean Henze, Patrick Smith, and Janet Chao University of San Diego (Dated: May 1, 2013)
More informationTowards Multiscale Gyrokinetic Simulations of ITERlike Plasmas
Frank Jenko MaxPlanckInstitut für Plasmaphysik, Garching Universität Ulm Towards Multiscale Gyrokinetic Simulations of ITERlike Plasmas 23 rd IAEA Fusion Energy Conference 1116 October 2010, Daejeon,
More informationELM filament heat loads on plasma facing components in JET and ITER
1 filament heat loads on plasma facing components in JET and ITER 1. Fundamenski, R.A.Pitts, 1 G.Arnoux, 3 M.Jakubowski, A.Loarte, 1 M.Beurskens and JET EFDA contributors 1 Euratom/UKAEA Fusion Association,
More informationPROBLEM SET. Heliophysics Summer School. July, 2013
PROBLEM SET Heliophysics Summer School July, 2013 Problem Set for Shocks and Particle Acceleration There is probably only time to attempt one or two of these questions. In the tutorial session discussion
More informationWeibel Instability in a BiMaxwellian Laser Fusion Plasma
1 IFP723 Weibel Instability in a BiMaxwellian Laser Fusion Plasma A. Sid 1), A. Ghezal 2), A. Soudani 3), M. Bekhouche 1) 1) Laboratoire de Physique des Rayonnements et leur interaction avec la Matière
More informationMeasurement of wakefields in hollow plasma channels Carl A. Lindstrøm (University of Oslo)
Measurement of wakefields in hollow plasma channels Carl A. Lindstrøm (University of Oslo) in collaboration with Spencer Gessner (CERN) presented by Erik Adli (University of Oslo) FACETII Science Workshop
More informationScaling laws for planetary dynamos driven by helical waves
Scaling laws for planetary dynamos driven by helical waves P. A. Davidson A. Ranjan Cambridge What keeps planetary magnetic fields alive? (Earth, Mercury, Gas giants) Two ingredients of the early theories:
More informationSolar Flare. A solar flare is a sudden brightening of solar atmosphere (photosphere, chromosphere and corona)
Solar Flares Solar Flare A solar flare is a sudden brightening of solar atmosphere (photosphere, chromosphere and corona) Flares release 10271032 ergs energy in tens of minutes. (Note: one Hbomb: 10
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 informationSTABILIZATION OF m=2/n=1 TEARING MODES BY ELECTRON CYCLOTRON CURRENT DRIVE IN THE DIII D TOKAMAK
GA A24738 STABILIZATION OF m=2/n=1 TEARING MODES BY ELECTRON CYCLOTRON CURRENT DRIVE IN THE DIII D TOKAMAK by T.C. LUCE, C.C. PETTY, D.A. HUMPHREYS, R.J. LA HAYE, and R. PRATER JULY 24 DISCLAIMER This
More informationStatistical analysis of fluctuations in the Alcator CMod scrapeoff layer
FACULTY OF SCIENCE AND TECHNOLOGY DEPARTMENT OF PHYSICS AND TECHNOLOGY Statistical analysis of fluctuations in the Alcator CMod scrapeoff layer Sindre Markus Fritzner FYS39 Master s Thesis in Physics
More informationLecture # 3. Introduction to Kink Modes the Kruskal Shafranov Limit.
Lecture # 3. Introduction to Kink Modes the Kruskal Shafranov Limit. Steve Cowley UCLA. This lecture is meant to introduce the simplest ideas about kink modes. It would take many lectures to develop the
More informationSimulations of Sawteeth in CTH. Nicholas Roberds August 15, 2015
Simulations of Sawteeth in CTH Nicholas Roberds August 15, 2015 Outline Problem Description Simulations of a small tokamak Simulations of CTH 2 Sawtoothing Sawtoothing is a phenomenon that is seen in all
More informationCompact Muon Solenoid Surapat EkIn École Polytechnique Fédérale de Lausanne
Compact Muon Solenoid Surapat EkIn École Polytechnique Fédérale de Lausanne Outline Introduction Electromagnetic Calorimeter Muon Chamber Application Conclusion Outline 2 LHC Experiments ~ 100 m https://cms.cern.ch/
More informationCharacteristics of Positive Ions in the Sheath Region of Magnetized Collisional Electronegative Discharges
Plasma Science and Technology, Vol.6, No.6, Jun. 204 Characteristics of Positive Ions in the Sheath Region of Magnetized Collisional Electronegative Discharges M. M. HATAMI, A. R. NIKNAM 2 Physics Department
More informationA novel helicon plasma source for negative ion beams for fusion
A novel helicon plasma source for negative ion beams for fusion Ivo Furno 1 R. Agnello 1, B. P. Duval 1, C. Marini 1, A. A. Howling 1, R. Jacquier 1, Ph. Guittienne 2, U. Fantz 3, D. Wünderlich 3, A. Simonin
More informationThe evolution of solar wind turbulence at kinetic scales
International Association of Geomagnetism and Aeronomy (IAGA) 2 nd Symposium: Solar Wind Space Environment Interaction c 2010 Cairo University Press December 4 th 8 th, 2009, Cairo, Egypt L.Damé & A.Hady
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 informationOverview of FRCrelated modeling (July 2014present)
Overview of FRCrelated modeling (July 2014present) Artan Qerushi AFRLUCLA Basic Research Collaboration Workshop January 20th, 2015 AFTC PA Release# 15009, 16 Jan 2015 Artan Qerushi (AFRL) FRC modeling
More informationModelling of lowtemperature plasmas: kinetic and transport mechanisms. L.L. Alves
Modelling of lowtemperature plasmas: kinetic and transport mechanisms L.L. Alves llalves@tecnico.ulisboa.pt Instituto de Plasmas e Fusão Nuclear Instituto Superior Técnico, Universidade de Lisboa Lisboa,
More informationTokamak Divertor System Concept and the Design for ITER. Chris Stoafer April 14, 2011
Tokamak Divertor System Concept and the Design for ITER Chris Stoafer April 14, 2011 Presentation Overview Divertor concept and purpose Divertor physics General design considerations Overview of ITER divertor
More informationResearch of Basic Plasma Physics Toward Nuclear Fusion in LHD
Research of Basic Plasma Physics Toward Nuclear Fusion in LHD Akio KOMORI and LHD experiment group National Institute for Fusion Science, Toki, Gifu 5095292, Japan (Received 4 January 2010 / Accepted
More informationVortices in accretion discs: formation process and dynamical evolution
Vortices in accretion discs: formation process and dynamical evolution Geoffroy Lesur DAMTP (Cambridge UK) LAOG (Grenoble) John Papaloizou SijmeJan Paardekooper Giant vortex in Naruto straight (Japan)
More informationq(0) pressure after crash 1.0 Single tearing on q=2 Double tearing on q=2 0.5
EX/P1 MHD issues in Tore Supra steadystate fully noninductive scenario P Maget 1), F Imbeaux 1), G Giruzzi 1), V S Udintsev ), G T A Huysmans 1), H Lütjens 3), JL Ségui 1), M Goniche 1), Ph Moreau
More informationNeoclassical Tearing Modes
Neoclassical Tearing Modes O. Sauter 1, H. Zohm 2 1 CRPPEPFL, Lausanne, Switzerland 2 MaxPlanckInstitut für Plasmaphysik, Garching, Germany Physics of ITER DPG Advanced Physics School 2226 Sept, 2014,
More information20. Alfven waves. ([3], p ; [1], p ; Chen, Sec.4.18, p ) We have considered two types of waves in plasma:
Phys780: Plasma Physics Lecture 20. Alfven Waves. 1 20. Alfven waves ([3], p.233239; [1], p.202237; Chen, Sec.4.18, p.136144) We have considered two types of waves in plasma: 1. electrostatic Langmuir
More informationClassical Scattering
Classical Scattering Daniele Colosi Mathematical Physics Seminar Daniele Colosi (IMATE) Classical Scattering 27.03.09 1 / 38 Contents 1 Generalities 2 Classical particle scattering Scattering cross sections
More informationMagnetohydrodynamic waves in a plasma
Department of Physics Seminar 1b Magnetohydrodynamic waves in a plasma Author: Janez Kokalj Advisor: prof. dr. Tomaž Gyergyek Petelinje, April 2016 Abstract Plasma can sustain different wave phenomena.
More informationLecture 7  Carrier Drift and Diffusion (cont.) February 20, Nonuniformly doped semiconductor in thermal equilibrium
6.720J/3.43J  Integrated Microelectronic Devices  Spring 2007 Lecture 71 Lecture 7  Carrier Drift and Diffusion (cont.) February 20, 2007 Contents: 1. Nonuniformly doped semiconductor in thermal equilibrium
More informationPoint Vortex Dynamics in Two Dimensions
Spring School on Fluid Mechanics and Geophysics of Environmental Hazards 9 April to May, 9 Point Vortex Dynamics in Two Dimensions Ruth Musgrave, Mostafa Moghaddami, Victor Avsarkisov, Ruoqian Wang, Wei
More informationThe Hall Effect. Figure 1: Geometry of the Hall probe [1]
The Hall Effect 1 Introduction In 1879, E. H. Hall observed that when a currentcarrying conductor is placed in a transverse magnetic field, the Lorentz force on the moving charges produces a potential
More informationControlling chaotic transport in Hamiltonian systems
Controlling chaotic transport in Hamiltonian systems Guido Ciraolo Facoltà di Ingegneria, Università di Firenze via S. Marta, I50129 Firenze, Italy Cristel Chandre, Ricardo Lima, Michel Vittot CPTCNRS,
More information221A Miscellaneous Notes Continuity Equation
221A Miscellaneous Notes Continuity Equation 1 The Continuity Equation As I received questions about the midterm problems, I realized that some of you have a conceptual gap about the continuity equation.
More informationTransport at high beta in the NSTX spherical tokamak
Transport at high beta in the NSTX spherical tokamak Walter Guttenfelder 1, R.E. Bell 1, E. Belova 1, J. Candy 2, J.M. Canik 3,N. Crocker 4, E. Fredrickson 1, S.P. Gerhardt 1, N. Gorelenkov 1, S.M. Kaye
More informationJ. Kesner. April Plasma Fusion Center Massachusetts Institute of Technology Cambridge, Massachusetts USA
PFC/JA8838 Effect of Local Shear on Drift Fluctuation Driven T'ransport in Tokamaks J. Kesner April 1989 Plasma Fusion Center Massachusetts Institute of Technology Cambridge, Massachusetts 2139 USA Submitted
More informationDYNAMO THEORY: THE PROBLEM OF THE GEODYNAMO PRESENTED BY: RAMANDEEP GILL
DYNAMO THEORY: THE PROBLEM OF THE GEODYNAMO PRESENTED BY: RAMANDEEP GILL MAGNETIC FIELD OF THE EARTH DIPOLE Field Structure Permanent magnetization of Core? 80% of field is dipole 20 % is non dipole 2)
More informationThermodynamical and microscopic properties of turbulent transport in the edge plasma
Home Search Collections Journals About Contact us My IOPscience Thermodynamical and microscopic properties of turbulent transport in the edge plasma This content has been downloaded from IOPscience. Please
More informationIAEA INTERNATIONAL ATOMIC ENERGY AGENCY
IAEA INTERNATIONAL ATOMIC ENERGY AGENCY 21 st IAEA Fusion Energy Conference Chengdu, China, 1621 Oct 2004 IAEACN149 / TH / 11 Studies of the Tokamak Edge with Self Consistent Turbulence, Equilibrium,
More informationGeometric Gyrokinetic Theory and its Applications to LargeScale Simulations of Magnetized Plasmas
Geometric Gyrokinetic Theory and its Applications to LargeScale Simulations of Magnetized Plasmas Hong Qin Princeton Plasma Physics Laboratory, Princeton University CEAEDFINRIA School  Numerical models
More informationCore Transport Properties in JT60U and JET Identity Plasmas
1 EXC/P412 Core Transport Properties in JT60U and JET Identity Plasmas X. Litaudon 1, Y. Sakamoto 2, P.C. de Vries 3, A. Salmi 4, T. Tala 5, C. Angioni 6, S. Benkadda 7, M.N.A. Beurskens 8, C. Bourdelle
More informationToroidal confinement of nonneutral plasma. Martin Droba
Toroidal confinement of nonneutral plasma Martin Droba Contents Experiments with toroidal nonneutral plasma Magnetic surfaces CNT and IAPhigh current ring Conclusion 2. Experiments with toroidal nonneutral
More informationInvestigations of pedestal turbulence and ELM bursts in NSTX Hmode plasmas
Supported by Investigations of pedestal turbulence and ELM bursts in NSTX Hmode plasmas Coll of Wm & Mary Columbia U CompX General Atomics FIU INL Johns Hopkins U LANL LLNL Lodestar MIT Lehigh U Nova
More informationImplementation of drift velocities and currents in SOLEDGE2DEIRENE
Implementation of drift velocities and currents in SOLEDGE2DEIRENE Hugo Bufferand, C Baudoin, J Bucalossi, G Ciraolo, J Denis, Nicolas Fedorczak, D Galassi, Philippe Ghendrih, R Leybros, Y Marandet, et
More informationNonlinear MHD Modelling of Rotating Plasma Response to Resonant Magnetic Perturbations.
Nonlinear MHD Modelling of Rotating Plasma Response to Resonant Magnetic Perturbations. M. Becoulet 1, F. Orain 1, G.T.A. Huijsmans 2, G. Dif Pradalier 1, G. Latu 1, C. Passeron 1, E. Nardon 1, V. Grandgirard
More informationEffect of 3D magnetic perturbations on the plasma rotation in ASDEX Upgrade
Effect of 3D magnetic perturbations on the plasma rotation in ASDEX Upgrade A F Martitsch 1, S V Kasilov 1,2, W Kernbichler 1, G Kapper 1, C G Albert 1, M F Heyn 1, H M Smith 3, E Strumberger 4, S Fietz
More information