Simulations of Sawteeth in CTH. Nicholas Roberds August 15, 2015


 Beatrice Hamilton
 11 months ago
 Views:
Transcription
1 Simulations of Sawteeth in CTH Nicholas Roberds August 15, 2015
2 Outline Problem Description Simulations of a small tokamak Simulations of CTH 2
3 Sawtoothing Sawtoothing is a phenomenon that is seen in all tokamak devices Lots of previous numerical studies have focused on sawtoothing First MHD simulation of a sawtooth crash in the late 1970s. First simulation with successive sawtooth crashes in the late 1980s. 3
4 The Sawtooth Oscillation Cycle 1) q0 < 1 2) Resistive internal kink mode becomes unstable 3) Island grows exponentially well into the nonlinear phase Center of island will become the new magnetic axis 4) Flux inside q=1 is completely or partially reconnected Temperature, q, current density profiles are flattened 5) q0= 1 after crash with complete reconnection 6) Temperature, current density profiles peak again due to ohmic heating 7) Go to 1) 4
5 Sawteeth are observed in CTH The Compact Toroidal Hybrid (CTH) is a tokamakstellarator hybrid Has a stellarator field with N=5 periodicity Has significant ohmically driven plasma current We would like to simulate CTH sawteeth 5
6 Sawtooth Simulations Initial conditions: Ideal MHD equilibrium from VMEC with q0 > 1 Start in the stable side of parameter space Electric field drives q0 < 1 Produces a selfconsistent equilibrium For tokamak cases, can choose to evolve only n=0 until q0 is driven below 1 Increase toroidal resolution when q<1 Saves computational resources 6
7 ηχmhd Is Used in Simulations Temperature dependent kperp Value of kpll usually clamped to a large value Spitzer resistivity Must take considerations to prevent m=2 islands from blowing up after first crash q=2 near conducting wall Electron temperature offset of ~30 ev 7
8 Simulations with Periodic Sawteeth Careful choice of simulation parameters periodic or quasiperiodic sawtooth crashes Some important parameters Viscosity kperp kpll Iplasma 8
9 Small Tokamak, Baseline case 33 successive crashes 6 toroidal modes n=5 mode energy larger than n=3 mode energy (underresolved) 30x20 finite elements of degree 3 S ~ 1.4E5 9
10 Small Tokamak, Baseline case 33 successive crashes Show movie 10
11 Small Tokamak, Low k_pll Relaxes to n=1 helical equilibrium with no sawtoothing k_pll ~ 1E7 at center with T dependence k_pll in previously shown cycling simulation uses k_pll=1e20 with k_pll_max=1e7 to remove T dependence in k_pll Both simulations have T dependant k_perp 11
12 Small Tokamak, Higher Resolution Periodic Cycles n=0 n=1 n=1 n=21 22 toroidal modes 30x30 finite elements of degree 3 S ~ 1.6E5 12
13 Small Tokamak, Higher Resolution Linear Phase VR component of the unstable n=1 mode Unstable mode is n=1 Has flow pattern of a rigid displacement Consistent with flow pattern of resistive internal kink mode 13
14 Small Tokamak, Higher Resolution Oscillations in Te Become Inverted Away from Core Electron temperature Inboard Side at phi=0 Time (ms) Outboard Side at phi=0 Time (ms) 14
15 Small Tokamak, Higher Plasma Current Activity seen after crashes Plasma current increased from 105 ka to 115 ka Activity can be seen after the complete reconnection of crash Can reduce kperp to eliminate this activity Possible explanation: Quasiinterchange mode unstable after crash Show movie 15
16 Small Tokamak, Higher Plasma Current Fastest growing mode just after crash is n=1 Flow pattern similar to quasiinterchange mode Quasiinterchange associated with a flat q profile, with q~1 Equilibrium at Step Flow Field of n=1 Mode 16
17 Small Tokamak, Higher Plasma Current Poincare plots just after crash look consistent with quasiinterchange Step Step
18 Small Tokamak, Higher Plasma Current Movies Poincare plots over Jphi Flow vectors over Jphi Electron temperature volumetric rendering 18
19 Simulation with CTH Equilibrium Field n=0 n=5 S ~ 1.2E5 43 toroidal modes 30x30 finite elements with degree 3 tmax = 5E8 n=10 19
20 CTH, Linear Phase Unstable mode in CTH is represented with many Fourier numbers A tearing mode analogous to the small tokamak case grows The tearing mode is represented with fourier numbers n=1, 4,6,9,11,14,16,19,21,... CTH has a stellarator field period of 5 n is not a good quantum number when stellarator fields are added n=1 4,6 9,11 39,41 20
21 CTH, Linear Phase Comparison with tokamak linear phase n=1 4,6 9,11 39,41 n=1 21
22 Unstable mode in CTH Images show fourier components of VR of the unstable mode. Because CTH has a stellarator field period of N=5, many fourier numbers are needed to represent this tearing mode. n=1 n=4 n=6 n=9 n=11 n=14 Higher n values have finer structure 22
23 CTH, Nonlinear Phase Time step is under resolved Affects linear growth rates, influencing τsaw q0,min A simulation that cycles with tmax = 5E8 may not cycle with tmax = 2E8 Using a very small maximum timestep might be important in simulations of any 3D device Tokamakstellarator hybrids Perturbed Tokamaks RFPs 23
24 Discussion ηχmhd simulations demonstrating repeated sawtooth crashes have been done Convergence properties of CTH cases should be further explored Future work to vary stellarator field strength in simulations to reproduce experimental scalings of sawtooth period Future work may explore 2fluid sawtoothing 24
Effects of stellarator transform on sawtooth oscillations in CTH. Jeffrey Herfindal
Effects of stellarator transform on sawtooth oscillations in CTH Jeffrey Herfindal D.A. Ennis, J.D. Hanson, G.J. Hartwell, E.C. Howell, C.A. Johnson, S.F. Knowlton, X. Ma, D.A. Maurer, M.D. Pandya, N.A.
More informationAC loop voltages and MHD stability in RFP plasmas
AC loop voltages and MHD stability in RFP plasmas K. J. McCollam, D. J. Holly, V. V. Mirnov, J. S. Sar, D. R. Stone UWMadison 54rd Annual Meeting of the APSDPP October 29th  November 2nd, 2012 Providence,
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 informationEvaluation of CT injection to RFP for performance improvement and reconnection studies
Evaluation of CT injection to RFP for performance improvement and reconnection studies S. Masamune A. Sanpei, T. Nagano, S. Nakanobo, R. Tsuboi, S. Kunita, M. Emori, H. Makizawa, H. Himura, N. Mizuguchi
More informationFast Secondary Reconnection and the Sawtooth Crash
Fast Secondary Reconnection and the Sawtooth Crash Maurizio Ottaviani 1, Daniele Del Sarto 2 1 CEAIRFM, SaintPaullezDurance (France) 2 Université de Lorraine, Institut Jean Lamour UMRCNRS 7198, Nancy
More informationarxiv: v1 [physics.plasmph] 11 Mar 2016
1 Effect of magnetic perturbations on the 3D MHD selforganization of shaped tokamak plasmas arxiv:1603.03572v1 [physics.plasmph] 11 Mar 2016 D. Bonfiglio 1, S. Cappello 1, M. Veranda 1, L. Chacón 2 and
More informationThe nonresonant kink modes triggering strong sawtoothlike crashes. in the EAST tokamak. and L. Hu 1
The nonresonant kink modes triggering strong sawtoothlike crashes in the EAST tokamak Erzhong Li 1, V. Igochine 2, O. Dumbrajs 3, L. Xu 1, K. Chen 1, T. Shi 1, and L. Hu 1 1 Institute of Plasma Physics,
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 informationINITIAL EVALUATION OF COMPUTATIONAL TOOLS FOR STABILITY OF COMPACT STELLARATOR REACTOR DESIGNS
INITIAL EVALUATION OF COMPUTATIONAL TOOLS FOR STABILITY OF COMPACT STELLARATOR REACTOR DESIGNS A.D. Turnbull and L.L. Lao General Atomics (with contributions from W.A. Cooper and R.G. Storer) Presentation
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 informationSaturated ideal modes in advanced tokamak regimes in MAST
Saturated ideal modes in advanced tokamak regimes in MAST IT Chapman 1, MD Hua 1,2, SD Pinches 1, RJ Akers 1, AR Field 1, JP Graves 3, RJ Hastie 1, CA Michael 1 and the MAST Team 1 EURATOM/CCFE Fusion
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 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 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 informationLinjin Zheng, Infernal Modes at Tokamak H mode Pedestal A Physics Interpreta;on for Edge Harmonic Oscilla;on (EHO)
International Sherwood Fusion Theory Conference, Austin, May 24, 2011 Infernal Modes at Tokamak H mode Pedestal A Physics Interpreta;on for Edge Harmonic Oscilla;on (EHO) Linjin Zheng, M. T. Kotschenreuther,
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 informationTomographic imaging of resistive mode dynamics in the Madison Symmetric Torus reversedfield pinch
PHYSICS OF PLASMAS 13, 012510 2006 Tomographic imaging of resistive mode dynamics in the Madison Symmetric Torus reversedfield pinch P. Franz, L. Marrelli, P. Piovesan, and I. Predebon Consorzio RFX,
More informationControl of linear modes in cylindrical resistive MHD with a resistive wall, plasma rotation, and complex gain
Control of linear modes in cylindrical resistive MHD with a resistive wall, plasma rotation, and complex gain Dylan Brennan 1 and John Finn 2 contributions from Andrew Cole 3 1 Princeton University / PPPL
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 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 informationCHAPTER 8 PERFORMANCELIMITING MAGNETOHYDRODYNAMICS IN JET
CHAPTER 8 PERFORMANCELIMITING MAGNETOHYDRODYNAMICS IN JET R. J. BUTTERY* and T. C. HENDER EURATOM0UKAEA Fusion Association, Culham Science Centre Abingdon, Oxfordshire OX14 3DB, United Kingdom Received
More informationModel for humpback relaxation oscillations
Model for humpback relaxation oscillations F. Porcelli a,b,c.angioni a,r.behn a,i.furno a,t.goodman a,m.a.henderson a, Z.A. Pietrzyk a,a.pochelon a,h.reimerdes a, E. Rossi c,o.sauter a a Centre de Recherches
More informationMHD Equilibrium and Stability of Tokamaks and RFP Systems with 3D Helical Cores
15th Workshop on MHD Stability Control, Madison, WI, USA, November 1517, 21 MHD Equilibrium and Stability of Tokamaks and FP Systems with 3D Helical Cores W. A. Cooper Ecole Polytechnique Fédérale de
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 informationSMR/ Summer College on Plasma Physics. 30 July  24 August, Introduction to Magnetic Island Theory.
SMR/18561 2007 Summer College on Plasma Physics 30 July  24 August, 2007 Introduction to Magnetic Island Theory. R. Fitzpatrick Inst. for Fusion Studies University of Texas at Austin USA Introduction
More informationBifurcated states of a rotating tokamak plasma in the presence of a static errorfield
Bifurcated states of a rotating tokamak plasma in the presence of a static errorfield Citation: Physics of Plasmas (1994present) 5, 3325 (1998); doi: 10.1063/1.873000 View online: http://dx.doi.org/10.1063/1.873000
More informationMST and the Reversed Field Pinch. John Sarff
MST and the Reversed Field Pinch John Sarff APAM Columbia University Sep 19, 2014 Outline Tutoriallevel review of tearing stability, magnetic relaxation, and transport in the RFP Ionrelated physics topics
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 informationTearing Mode in Reversed Shear Plasmas
JP0350423 1.17 Long Time Scale Plasma Dynamics Driven by the Double Tearing Mode in Reversed Shear Plasmas Y.Ishii,') M.Azumi,') Y.Kishimoto') and J.N.LeboeUf 2) 1) Naka Fusion Research Establishment,
More informationPlasma models for the design of the ITER PCS
Plasma models for the design of the ITER PCS G. De Tommasi 1,2 on behalf of the CREATE team 1 Consorzio CREATE, Naples, Italy 2 Department of Electrical Engineering and Information Technology, University
More informationModelling of the penetration process of externally applied helical magnetic perturbation of the DED on the TEXTOR tokamak
INSTITUTE OF PHYSICS PUBLISHING Plasma Phys. Control. Fusion 8 (6) 69 8 PLASMA PHYSICS AND CONTROLLED FUSION doi:.88/7/8// Modelling of the penetration process of externally applied helical magnetic perturbation
More informationNonlinear modeling of the Edge Localized Mode control by Resonant Magnetic Perturbations in ASDEX Upgrade
1 TH/P126 Nonlinear modeling of the Edge Localized Mode control by Resonant Magnetic Perturbations in ASDEX Upgrade F.Orain 1, M.Hölzl 1, E.Viezzer 1, M.Dunne 1, M.Bécoulet 2, P.Cahyna 3, G.T.A.Huijsmans
More informationTokamak/Helical Configurations Related to LHD and CHSqa
9TH WORKSHOP ON MHD STABILITY CONTROL: "CONTROL OF MHD STABILITY: BACK TO THE BASICS" NOVEMBER 2123, 2004, PRINCETON PLASMA PHYSICS LABORATORY Tokamak/Helical Configurations Related to LHD and CHSqa
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 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 informationGA A25853 FAST ION REDISTRIBUTION AND IMPLICATIONS FOR THE HYBRID REGIME
GA A25853 FAST ION REDISTRIBUTION AND IMPLICATIONS FOR THE HYBRID REGIME by R. NAZIKIAN, M.E. AUSTIN, R.V. BUDNY, M.S. CHU, W.W. HEIDBRINK, M.A. MAKOWSKI, C.C. PETTY, P.A. POLITZER, W.M. SOLOMON, M.A.
More information22.615, MHD Theory of Fusion Systems Prof. Freidberg Lecture 19
. tability of the straight tokamak.65, MHD Theory of Fusion ystems Prof. Freidberg Lecture 9. ressure driven modes (uydams Criterion). internal modes 3. external modes. Tokamak Ordering Bθ ar B μ q or
More informationarxiv:physics/ v1 [physics.plasmph] 14 Nov 2005
arxiv:physics/0511124v1 [physics.plasmph] 14 Nov 2005 Early nonlinear regime of MHD internal modes: the resistive case M.C. Firpo Laboratoire de Physique et Technologie des Plasmas (C.N.R.S. UMR 7648),
More informationUnderstanding sawtooth activity during intense electron cyclotron heating experiments on TCV
Understanding sawtooth activity during intense electron cyclotron heating experiments on TCV I. Furno, C. Angioni, F. Porcelli a, H. Weisen, R. Behn, T.P. Goodman, M.A. Henderson, Z.A. Pietrzyk, A. Pochelon,
More informationNonsolenoidal Startup and Plasma Stability at NearUnity Aspect Ratio in the Pegasus Toroidal Experiment
1 EXS/P207 Nonsolenoidal Startup and Plasma Stability at NearUnity Aspect Ratio in the Pegasus Toroidal Experiment R.J. Fonck 1), D.J. Battaglia 2), M.W. Bongard 1), E.T. Hinson 1), A.J. Redd 1), D.J.
More informationAdvancing Toward Reactor Relevant Startup via Localized Helicity Injection at the Pegasus Toroidal Experiment
Advancing Toward Reactor Relevant Startup via Localized Helicity Injection at the Pegasus Toroidal Experiment E. T. Hinson J. L. Barr, M. W. Bongard, M. G. Burke, R. J. Fonck, J. M. Perry, A. J. Redd,
More informationMHD Modes of Solar Plasma Structures
PX420 Solar MHD 20132014 MHD Modes of Solar Plasma Structures Centre for Fusion, Space & Astrophysics Wave and oscillatory processes in the solar corona: Possible relevance to coronal heating and solar
More informationMagnetic Reconnection: explosions in space and astrophysical plasma. J. F. Drake University of Maryland
Magnetic Reconnection: explosions in space and astrophysical plasma J. F. Drake University of Maryland Magnetic Energy Dissipation in the Universe The conversion of magnetic energy to heat and high speed
More informationELM control with RMP: plasma response models and the role of edge peeling response
ELM control with RMP: plasma response models and the role of edge peeling response Yueqiang Liu 1,2,3,*, C.J. Ham 1, A. Kirk 1, Li Li 4,5,6, A. Loarte 7, D.A. Ryan 8,1, Youwen Sun 9, W. Suttrop 10, Xu
More informationFUSION and PLASMA PHYSICS
FUSION and PLASMA PHYSICS My objectives: to explain why Nuclear Fusion is worth pursuing to describe some basic concepts behind magnetic confinement to summarize the history of fusion to describe some
More informationOn ElectronCyclotron Waves in Relativistic NonThermal Tokamak Plasmas
1 On ElectronCyclotron Waves in Relativistic NonThermal Tokamak Plasmas Lj. Nikolić and M.M. Škorić Vinča Institute of Nuclear Sciences, P.O.Box 522, Belgrade 11001, Serbia and Montenegro ljnikoli@tesla.rcub.bg.ac.yu
More informationPlasma Stability in Tokamaks and Stellarators
Plasma Stability in Tokamaks and Stellarators Gerald A. Navratil GCEP Fusion Energy Workshop Princeton, NJ 1 May 006 ACKNOWLEDGEMENTS Borrowed VGs from many colleagues: J. Bialek, A. Garofalo,R. Goldston,
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 informationConfinement Studies during LHCD and LHW Ion Heating on HL1M
Confinement Studies during LHCD and LHW Ion Heating on HL1M Y. Liu, X.D.Li, E.Y. Wang, J. Rao, Y. Yuan, H. Xia, W.M. Xuan, S.W. Xue, X.T. Ding, G.C Guo, S.K. Yang, J.L. Luo, G.Y Liu, J.E. Zeng, L.F. Xie,
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 informationOverview of Pilot Plant Studies
Overview of Pilot Plant Studies and contributions to FNST Jon Menard, Rich Hawryluk, Hutch Neilson, Stewart Prager, Mike Zarnstorff Princeton Plasma Physics Laboratory Fusion Nuclear Science and Technology
More informationObservation of tearing mode deceleration and locking due to eddy currents induced in a conducting shell
PHYSICS OF PLASMAS VOLUME 11, NUMBER 5 MAY 2004 Observation of tearing mode deceleration and locking due to eddy currents induced in a conducting shell B. E. Chapman Department of Physics, University of
More informationThe Virial Theorem, MHD Equilibria, and ForceFree Fields
The Virial Theorem, MHD Equilibria, and ForceFree Fields Nick Murphy HarvardSmithsonian Center for Astrophysics Astronomy 253: Plasma Astrophysics February 10 12, 2014 These lecture notes are largely
More informationThe Magnetorotational Instability
The Magnetorotational Instability Nick Murphy HarvardSmithsonian Center for Astrophysics Astronomy 253: Plasma Astrophysics March 10, 2014 These slides are based off of Balbus & Hawley (1991), Hawley
More informationWhat is a reversed field pinch?
What is a reversed field pinch? Dominique Escande To cite this version: Dominique Escande. What is a reversed field pinch?. 2013. HAL Id: hal00909102 https://hal.archivesouvertes.fr/hal00909102
More informationM. T. Beidler 1, J. D. Callen 1, C. C. Hegna 1, C. R. Sovinec 1, N. M. Ferraro 2
P1.015 Nonlinear Modeling Benchmarks of Forced Magnetic Reconnection with NIMROD and M3DC1 M. T. Beidler 1, J. D. Callen 1, C. C. Hegna 1, C. R. Sovinec 1, N. M. Ferraro 2 1 Department of Engineering
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 informationStellarators. Dr Ben Dudson. 6 th February Department of Physics, University of York Heslington, York YO10 5DD, UK
Stellarators Dr Ben Dudson Department of Physics, University of York Heslington, York YO10 5DD, UK 6 th February 2014 Dr Ben Dudson Magnetic Confinement Fusion (1 of 23) Previously... Toroidal devices
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 DESIGN FOR ARIESCS
PHYSICS DESIGN FOR ARIESCS L. P. KU, a * P. R. GARABEDIAN, b J. LYON, c A. TURNBULL, d A. GROSSMAN, e T. K. MAU, e M. ZARNSTORFF, a and ARIES TEAM a Princeton Plasma Physics Laboratory, Princeton University,
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 informationInitiatives in NonSolenoidal Startup and Hmode Physics at NearUnity A
Initiatives in NonSolenoidal Startup and Hmode Physics at NearUnity A M.W. Bongard, J.L. Barr, M.G. Burke, R.J. Fonck, E.T. Hinson, B.T. Lewicki, J.M. Perry, A.J. Redd, D.J. Schlossberg, K.E. Thome,
More informationHOW THE DEMO FUSION REACTOR SHOULD LOOK IF ITER FAILS. Paul Garabedian and Geoffrey McFadden
HOW THE DEMO FUSION REACTOR SHOULD LOOK IF ITER FAILS Paul Garabedian and Geoffrey McFadden 1. Summary Runs of the NSTAB equilibrium and stability code show there are many 3D solutions of the advanced
More informationVertical Displacement Events in Shaped Tokamaks. Abstract
Vertical Displacement Events in Shaped Tokamaks A. Y. Aydemir Institute for Fusion Studies The University of Texas at Austin Austin, Texas 78712 USA Abstract Computational studies of vertical displacement
More informationResistive Wall Mode Observation and Control in ITERRelevant Plasmas
Resistive Wall Mode Observation and Control in ITERRelevant Plasmas J. P. Levesque April 12, 2011 1 Outline Basic Resistive Wall Mode (RWM) model RWM stability, neglecting kinetic effects Sufficient for
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 informationNumerical investigation of threedimensional singlespecies plasma equilibria on magnetic surfaces
PHYSICS OF PLASMAS 12, 072105 2005 Numerical investigation of threedimensional singlespecies plasma equilibria on magnetic surfaces Remi G. Lefrancois, Thomas Sunn Pedersen, Allen H. Boozer, and Jason
More informationAmplification of magnetic fields in core collapse
Amplification of magnetic fields in core collapse Miguel Àngel Aloy Torás, Pablo CerdáDurán, Thomas Janka, Ewald Müller, Martin Obergaulinger, Tomasz Rembiasz Universitat de València; MaxPlanckInstitut
More informationEffect of local E B flow shear on the stability of magnetic islands in tokamak plasmas
Effect of local E B flow shear on the stability of magnetic islands in tokamak plasmas R. Fitzpatrick and F. L. Waelbroeck Citation: Physics of Plasmas (1994present) 16, 052502 (2009); doi: 10.1063/1.3126964
More informationThreedimensional MHD simulations of counterhelicity spheromak merging in the Swarthmore Spheromak Experiment
Threedimensional MHD simulations of counterhelicity spheromak merging in the Swarthmore Spheromak Experiment C. E. Myers, 1, a) E. V. Belova, 1 M. R. Brown, 2 T. Gray, 2 C. D. Cothran, 2, b) and M. J.
More informationVolume 114 Number 4 JulyAugust Journal of Research of the National Institute of Standards and Technology
[J. Res. Natl. Inst. Stand. Technol. 114, 229236 (2009)] Design of the DEMO Fusion Reactor Following ITER Volume 114 Number 4 JulyAugust 2009 Paul R. Garabedian Courant Institute, New York University,
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 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 informationHmode and NonSolenoidal Startup in the Pegasus UltralowA Tokamak
1 OV/54 Hmode and NonSolenoidal Startup in the Pegasus UltralowA Tokamak R.J. Fonck 1, J.L. Barr 1, G. M. Bodner 1, M.W. Bongard 1, M.G. Burke 1, D. M. Kriete 1, J.M. Perry 1, J.A. Reusch 1, D.J. Schlossberg
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 informationMagnetic Confinement Fusion and Tokamaks Chijin Xiao Department of Physics and Engineering Physics University of Saskatchewan
The Sun Magnetic Confinement Fusion and Tokamaks Chijin Xiao Department of Physics and Engineering Physics University of Saskatchewan 2017 CNS Conference Niagara Falls, June 47, 2017 Tokamak Outline Fusion
More informationComparing DINA code simulations with TCV experimental plasma equilibrium responses
1 Comparing DINA code simulations with TCV experimental plasma equilibrium responses R.R. Khayrutdinov 2, J.B. Lister 1, V.E. Lukash 3, J.P. Wainwright 4 1 Centre de Recherches en Physique des Plasmas,
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 informationFinal Agenda HEPP Colloquium 2013
Final Agenda HEPP Colloquium 2013 Date 16 19 September 2012 Location The Lakeside BURGHOTEL zu Strausberg Gielsdorfer Chaussee 6 15344 Strausberg Monday, 13:00 14:00 Arrivals and lunch 14.00 14:15 Registration
More information37. MHD RELAXATION: MAGNETIC SELFORGANIZATION
37. MHD RELAXATION: MAGNETIC SELFORGANIZATION Magnetized fluids and plasmas are observed to exist naturally in states that are relatively independent of their initial conditions, or the way in which the
More informationSpace Plasma Physics Thomas Wiegelmann, 2012
Space Plasma Physics Thomas Wiegelmann, 2012 1. Basic Plasma Physics concepts 2. Overview about solar system plasmas Plasma Models 3. Single particle motion, Test particle model 4. Statistic description
More informationRESISTIVE BALLOONING MODES AND THE SECOND REGION OF STABILITY
Plasma Physics and Controlled Fusion, Vol. 29, No. 6, pp. 719 to 121, 1987 Printed in Great Britain 07413335/87$3.00+.OO 1OP Publishing Ltd. and Pergamon Journals Ltd. RESISTIVE BALLOONING MODES AND THE
More informationTURBULENT TRANSPORT THEORY
ASDEX Upgrade MaxPlanckInstitut für Plasmaphysik TURBULENT TRANSPORT THEORY C. Angioni GYRO, J. Candy and R.E. Waltz, GA The problem of Transport Transport is the physics subject which studies the physical
More informationA. Bers, A. K. Ram, and S. D. Schultz. Plasma Science and Fusion Center,
COUPLING TO ELECTRON BERNSTEIN WAVES IN TOKAMAKS* A. Bers, A. K. Ram, and S. D. Schultz Plasma Science and Fusion Center, Massachusetts Institute of Technology, Cambridge, MA 02139. U.S.A. Abstract The
More informationExtended Lumped Parameter Model of Resistive Wall Mode and The Effective SelfInductance
Extended Lumped Parameter Model of Resistive Wall Mode and The Effective SelfInductance M.Okabayashi, M. Chance, M. Chu* and R. Hatcher A. Garofalo**, R. La Haye*, H. Remeirdes**, T. Scoville*, and T.
More informationgeneralfusion Characterization of General Fusion's Plasma Devices 2015 Nimrod Summer Workshop
Characterization of General Fusion's Plasma Devices 2015 Nimrod Summer Workshop Aaron Froese, Charlson Kim, Meritt Reynolds, Sandra Barsky, Victoria Suponitsky, Stephen Howard, Russ Ivanov, Peter O'Shea,
More informationPROGRESS IN STEADYSTATE SCENARIO DEVELOPMENT IN THE DIIID TOKAMAK
PROGRESS IN STEADYSTATE SCENARIO DEVELOPMENT IN THE DIIID TOKAMAK by T.C. LUCE, J.R. FERRON, C.T. HOLCOMB, F. TURCO, P.A. POLITZER, and T.W. PETRIE GA A26981 JANUARY 2011 DISCLAIMER This report was prepared
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 informationOn existence of resistive magnetohydrodynamic equilibria
arxiv:physics/0503077v1 [physics.plasmph] 9 Mar 2005 On existence of resistive magnetohydrodynamic equilibria H. Tasso, G. N. Throumoulopoulos MaxPlanckInstitut für Plasmaphysik Euratom Association
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 informationImproved evolution equations for magnetic island chains in toroidal pinch plasmas subject to externally applied resonant magnetic perturbations
PHYSICS OF PLASMAS VOLUME 8, NUMBER 10 OCTOBER 2001 Improved evolution equations for magnetic island chains in toroidal pinch plasmas subject to externally applied resonant magnetic perturbations Richard
More information2011 Activity Report Technical Scientific Committee 20 January Activity Report  1 
2011 Activity Report  1  1. INTRODUCTION AND KEY OBJECTIVES 2. RFXMOD AND RFP PHYSICS 3. ITER 4. TOKAMAK PHYSICS AND TECHNOLOGY 5. THEORY AND MODELLING 6. DIAGNOSTICS 7. BROADER APPROACH 8. OTHER ACTIVITIES
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 informationExperimental studies of tearing mode and resistive wall mode dynamics in the reversed field pinch configuration
Experimental studies of tearing mode and resistive wall mode dynamics in the reversed field pinch configuration JennyAnn Malmberg DOCTORAL THESIS Alfvén Laboratory Royal Institute of Technology Stockholm
More informationGA A23713 RECENT ECCD EXPERIMENTAL STUDIES ON DIII D
GA A271 RECENT ECCD EXPERIMENTAL STUDIES ON DIII D by C.C. PETTY, J.S. degrassie, R.W. HARVEY, Y.R. LINLIU, J.M. LOHR, T.C. LUCE, M.A. MAKOWSKI, Y.A. OMELCHENKO, and R. PRATER AUGUST 2001 DISCLAIMER This
More informationJacob s Ladder Controlling Lightning
Host: Fusion specialist: Jacob s Ladder Controlling Lightning PART 1 Jacob s ladder demonstration Video Teacher resources Phil Dooley European Fusion Development Agreement Peter de Vries European Fusion
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 informationLight and Matter. Thursday, 8/31/2006 Physics 158 Peter Beyersdorf. Document info
Light and Matter Thursday, 8/31/2006 Physics 158 Peter Beyersdorf Document info 3. 1 1 Class Outline Common materials used in optics Index of refraction absorption Classical model of light absorption Light
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 informationRelativistic reconnection at the origin of the Crab gammaray flares
Relativistic reconnection at the origin of the Crab gammaray flares Benoît Cerutti Center for Integrated Plasma Studies University of Colorado, Boulder, USA Collaborators: Gregory Werner (CIPS), Dmitri
More information