Overview of the RFX-mod fusion science programme

This paper reports the highlights of the RFX-mod fusion science programme since the last 2010 IAEA Fusion Energy Conference. The RFX-mod fusion science programme focused on two main goals: exploring the fusion potential of the reversed field pinch (RFP) magnetic configuration and contributing to the solution of key science and technology problems in the roadmap to ITER. Active control of several plasma parameters has been a key tool in this endeavour. New upgrades on the system for active control of magnetohydrodynamic (MHD) stability are underway and will be presented in this paper. Unique among the existing fusion devices, RFX-mod has been operated both as an RFP and as a tokamak. The latter operation has allowed the exploration of edge safety factor qedge < 2 with active control of MHD stability and studies concerning basic energy and flow transport mechanisms. Strong interaction has continued with the stellarator community in particular on the physics of helical states and on three-dimensional codes.

W. A. Cooper | L. Giudicotti | E. Zilli | P. Sonato | T. Luce | T. Luce | J. Hanson | S. Hirshman | R. Sánchez | S. Ide | G. Jackson | L. Frassinetti | R. White | E. Gaio | R. Piovan | M. Bigi | Yueqiang Liu | R. Paccagnella | T. Bolzonella | G. Marchiori | A. Luchetta | G. Manduchi | L. Marrelli | P. Martin | G. Spizzo | P. Zanca | A. Fasoli | E. Olofsson | M. Okabayashi | F. Villone | P. Bettini | G. Masi | V. Rigato | G. Chitarin | N. Marconato | A. Roquemore | V. Toigo | V. Antoni | Y. Hirano | N. Pomaro | L. Chacón | S. Munaretto | Y.Q. Liu | D. Spong | Y. In | M. Takechi | G. Delzanno | M. Brombin | R. Cavazzana | M. Moresco | I. Furno | D. Mansfield | T. Barbui | D. Carralero | L. Carraro | M. Puiatti | W. Schneider | N. Vianello | M. Zuin | Piero Martin | M. Agostini | S. Martini | F. Avino | F. Fellin | M. Valisa | F. Ghezzi | J. Sarff | P. Scarin | A. Barbalace | M. Spolaore | C. Theiler | E. Martines | J. Alonso | C. Hidalgo | S. Barison | P. Innocente | A. Canton | G. Serianni | D. Terranova | R. Pasqualotto | F. Sattin | R. Lorenzini | P. Piovesan | D. Bonfiglio | F. Bonomo | S. Cappello | D. Escande | A. Fassina | P. Franz | M. Gobbin | L. Apolloni | F. Auriemma | M. Baruzzo | A. Buffa | B. Chapman | A. Lorenzi | A. Ferro | E. Gazza | F. Gnesotto | L. Grando | S. Guo | D. Marcuzzi | L. Novello | S. Peruzzo | L. Piron | I. Predebon | G. Rostagni | E. Spada | A. Soppelsa | S. Spagnolo | C. Taliercio | P. Zaccaria | B. Zaniol | L. Zanotto | B. Momo | S. D. Bello | P. Agostinetti | M. Barbisan | R. Bilel | M. Boldrin | G. Ciaccio | M. D. Palma | R. Delogu | J. Dong | C. Finotti | M. F. Palumbo | W. Gonzales | S. Kiyama | S. F. Liu | A. Maistrello | G. Matsunaga | G. Mazzitelli | M. Pavei | N. Pilan | C. Piron | M. Recchia | A. Rizzolo | A. Ruzzon | H. Sakakita | E. Sartori | A. Scaggion | G. Trevisan | M. Valente | M. Veranda | Zhirui Wang | X. Xu | A. Zamengo | F. Fantini | Z.R. Wang | N. Fonnesu | P. Veltri | S. Fiameni | G. Zollino | J. D. Hanson | R. Sánchez | C. Bustreo | A. Pesce | G. De Masi | J. Finn | N. Marconato | S. Ide | X.Y. Xu | W. Cooper | J. Dong | M. Barp | M. D. Muri | S. Dal Bello | M. Dalla Palma | M. De Muri | M. Agostini | A. Fiorentin | P. Veltri | D. López Bruna | K. McCollam | C. Theiler | P. Bettini | J. Framarin | D. Bruna | M. Puiatti | S. Hirshman | A. de Lorenzi | A. Fasoli | M. Furno Palumbo | Y. In | S.F. Liu | J. Hanson | G. L. Jackson | Piero Martin | M. Agostini | J. Alonso | Simona Barison | Luis Chacon | W. A. Cooper | G. D. Masi | J. Dong | Dominique Escande | A. Fasoli | John M. Finn | I. Furno | S. C. Guo | James D. Hanson | S. Ide | Yongkyoon In | S. F. Liu | Yueqiang Liu | D. L. Bruna | E. Martines | R. Sanchez | J. Sarff | Pierluigi Veltri | F. Villone | Zhirui Wang | X. Y. Xu

[1]  T. Bolzonella,et al.  Advances in understanding RFX-mod helical plasmas , 2013 .

[2]  L. Chacón,et al.  Impact of helical boundary conditions on nonlinear 3D magnetohydrodynamic simulations of reversed-field pinch , 2013 .

[3]  G. Spizzo,et al.  3D effects on the RFX-mod boundary , 2013 .

[4]  L. Marrelli,et al.  Wall conditioning and density control in the reversed field pinch RFX-mod , 2013 .

[5]  R. Paccagnella,et al.  Experimental observation of microtearing modes in a toroidal fusion plasma. , 2013, Physical review letters.

[6]  A. Luchetta,et al.  Upgrade of the RFX-mod real time control system☆ , 2012 .

[7]  G. Marchiori,et al.  Advanced feedback control of magnetohydrodynamic instabilities: comparison of compensation techniques for radial sensors , 2012 .

[8]  G. Spizzo,et al.  Inter-machine scalings of plasma filament electromagnetic features , 2012 .

[9]  G. Manduchi,et al.  RWM control studies on RFX-mod with a limited set of active coilsThis paper was an intended contribution to the special issue on MHD control in burning plasmas (iopscience.iop.org/0029-5515/52/7). , 2012 .

[10]  Yueqiang Liu,et al.  Drift kinetic effects on the resistive wall mode stability—Comparison between reversed field pinches and tokamaks , 2012 .

[11]  M. Chu,et al.  Kinetic damping of resistive wall mode in reversed field pinch , 2012 .

[12]  Fabio Villone,et al.  Dynamic simulator of RWM control for fusion devices: modelling and experimental validation on RFX-mod , 2012 .

[13]  G. Masi,et al.  RFX-mod wall conditioning by lithium pellet injection , 2012 .

[14]  T. Bolzonella,et al.  Extended characterization of RWM active control system in RFX-mod , 2012 .

[15]  C. Angioni,et al.  On the mutual effect of ion temperature gradient instabilities and impurity peaking in the reversed field pinch , 2011, 1110.4815.

[16]  J. Callen.  Effects of 3D magnetic perturbations on toroidal plasmas , 2011 .

[17]  K. J. McCollam,et al.  Overview of the RFX fusion science program , 2011 .

[18]  G. Marchiori,et al.  Improved dynamic response of magnetic feedback in RFX-mod and DIII-D , 2011 .

[19]  Anton Soppelsa,et al.  Influence of external 3D magnetic fields on helical equilibrium and plasma flow in RFX-mod , 2011 .

[20]  L. Carraro,et al.  Impurity effects on the ion temperature gradient mode in reversed-field pinch plasmas , 2011 .

[21]  Nicola Vianello,et al.  Topology and transport in the edge region of RFX-mod helical regimes , 2011 .

[22]  M. L. Apicella,et al.  FTU results with a liquid lithium limiter , 2011 .

[23]  W. A. Cooper,et al.  Magnetohydrodynamic properties of nominally axisymmetric systems with 3D helical core , 2011 .

[24]  Yueqiang Liu,et al.  Magnetic perturbation experiments on MAST L- and H-mode plasmas using internal coils , 2011 .

[25]  D. Escande,et al.  Necessary criterion for magnetic field reversal in the reversed-field pinch , 2011 .

[26]  Piero Martin,et al.  Lessons from the RFP on Magnetic Feedback Control of Plasma Stability , 2011 .

[27]  V. Rohde,et al.  Direct observation of current in type-I edge-localized-mode filaments on the ASDEX Upgrade tokamak. , 2011, Physical review letters.

[28]  L. Marrelli,et al.  Vanishing magnetic shear and electron transport barriers in the RFX-mod reversed field pinch. , 2011, Physical review letters.

[29]  N. Vianello,et al.  Modelling the temperature plateau in RFX-mod single-helical-axis (SHAx) states , 2011 .

[30]  Remy Collier,et al.  With Regard to the Low Mode Target Lifetime: An Analytical Model , 2011 .

[31]  L. Zakharov,et al.  Comparison of various wall conditionings on the reduction of H content and particle recycling in EAST , 2011 .

[32]  L. Giudicotti,et al.  A 3D approach to equilibrium, stability and transport studies in RFX-mod improved regimes , 2010 .

[33]  G. Delzanno,et al.  Control of ideal and resistive magnetohydrodynamic modes in reversed field pinches with a resistive wall , 2010 .

[34]  S. Hirshman,et al.  Three-dimensional equilibria and transport in RFX-mod: A description using stellarator toolsa) , 2010 .

[35]  Allen H. Boozer,et al.  Control of non-axisymmetric toroidal plasmas , 2010 .

[36]  G. Spizzo,et al.  Investigation on the relation between edge radial electric field asymmetries in RFX-mod and density limit , 2010 .

[37]  L. Chacón,et al.  Nonlinear three-dimensional verification of the SPECYL and PIXIE3D magnetohydrodynamics codes for fusion plasmas , 2010 .

[38]  Antonio Barbalace,et al.  MARTe: A Multiplatform Real-Time Framework , 2010, IEEE Transactions on Nuclear Science.

[39]  Italo Predebon,et al.  Gyrokinetic simulations of ion temperature gradient modes in the reversed field pinch , 2010 .

[40]  F. Milani,et al.  Self-organized helical equilibria as a new paradigm for ohmically heated fusion plasmas , 2009 .

[41]  E. A. Lazarus,et al.  V3FIT: a code for three-dimensional equilibrium reconstruction , 2009 .

[42]  Giuseppe Marchiori,et al.  Integrated identification of RFX-mod active control system from experimental data and finite element model , 2009 .

[43]  J. Ferreira,et al.  Plasma performance and confinement in the TJ-II stellarator with lithium-coated walls , 2008 .

[44]  M. Ono,et al.  The effect of lithium surface coatings on plasma performance in the National Spherical Torus Experiment , 2008 .

[45]  H. Koslowski,et al.  The interaction between plasma rotation, stochastic fields and tearing mode excitation by external perturbation fields , 2008 .

[46]  P. Zanca,et al.  Avoidance of tearing modes wall-locking in a reversed field pinch with active feedback coils , 2008 .

[47]  Neoclassical toroidal viscosity and error-field penetration in tokamaksa) , 2007 .

[48]  Gabriele Manduchi,et al.  Beyond the intelligent shell concept: the clean-mode-control , 2007 .

[49]  Anton Soppelsa,et al.  Development and validation of an electromagnetic model of the active control system of MHD modes in RFX-mod , 2007 .

[50]  V. Toigo,et al.  Active MHD control at high currents in RFX-mod , 2007 .

[51]  M. L. Apicella,et al.  First experiments with lithium limiter on FTU , 2007 .

[52]  J. Manickam,et al.  Chapter 3: MHD stability, operational limits and disruptions , 2007 .

[53]  H. Koslowski,et al.  Tearing mode physics studies applying the dynamic ergodic divertor on TEXTOR , 2006 .

[54]  Sergio Ortolani,et al.  Active MHD control experiments in RFX-mod , 2006 .

[55]  Keith H. Burrell,et al.  Edge stability and transport control with resonant magnetic perturbations in collisionless tokamak plasmas , 2006 .

[56]  M. Cavinato,et al.  Distributed real time control in RFX-mod nuclear fusion experiment: commissioning and first results , 2005, 14th IEEE-NPSS Real Time Conference, 2005..

[57]  H. Koslowski,et al.  Transport and divertor properties of the dynamic ergodic divertor , 2005 .

[58]  M. Podestà,et al.  Electrostatic turbulence and transport in a simple magnetized plasma , 2005 .

[59]  J. T. Scoville,et al.  Nonaxisymmetric field effects on Alcator C-Moda) , 2005 .

[60]  S. Cappello.  Bifurcation in the MHD behaviour of a self-organizing system: the reversed field pinch (RFP) , 2004 .

[61]  V. Rozhansky,et al.  Transverse conductivity in a braided magnetic field , 1998 .

[62]  R. L. Haye,et al.  Modification of sawtooth crash behaviour during large error field experiments on the DIII-D tokamak , 1994 .

[63]  J. Ferreira,et al.  Effect of resonant magnetic perturbations on COMPASS-C tokamak discharges , 1992 .

[64]  J. C. Whitson,et al.  Steepest‐descent moment method for three‐dimensional magnetohydrodynamic equilibria , 1983 .