Effects of Three-Dimensional Electromagnetic Structures on Resistive-Wall-Mode Stability of Reversed Field Pinches

Villone, F; Liu, Y Q; Paccagnella, R; Bolzonella, T; Rubinacci, G

doi:10.1103/PHYSREVLETT.100.255005

Title: Effects of Three-Dimensional Electromagnetic Structures on Resistive-Wall-Mode Stability of Reversed Field Pinches

Full Record
Other Related Research

Abstract

In this Letter, the linear stability of the resistive wall modes (RWMs) in toroidal geometry for a reversed field pinch (RFP) plasma is studied. Three computational models are used: the cylindrical code ETAW, the toroidal MHD code MARS-F, and the CarMa code, able to take fully into account the effects of a three-dimensional conducting structure which mimics the real shell geometry of a reversed field pinch experimental device. The computed mode growth rates generally agree with experimental data. The toroidal effects and the three-dimensional features of the shell, like gaps, allow a novel interpretation of the RWM spectrum in RFP's and remove its degeneracy. This shows the importance of making accurate modeling of conductors for the RWM predictions also in future devices such as ITER.

Authors:

Villone, F ^[1]; Liu, Y Q ^[2]; Paccagnella, R; Bolzonella, T ^[3]; Rubinacci, G ^[4]

Ass. Euratom/ENEA/CREATE, DAEIMI, Universita di Cassino, Via Di Biasio 43, 03043, Cassino (Italy)
EURATOM/UKAEA Fusion Association, Culham Science Centre, Abingdon, Oxon, OX14 3DB (United Kingdom)
Consorzio RFX, Ass. Euratom/ENEA, and C.N.R., Corso Stati Uniti 4, 35127, Padova (Italy)
Ass. Euratom/ENEA/CREATE, DIEL, Universita di Napoli Federico II, Via Claudio 21, 80125, Napoli (Italy)

Publication Date:: Fri Jun 27 00:00:00 EDT 2008

OSTI Identifier:: 21134079

Resource Type:: Journal Article

Journal Name:: Physical Review Letters

Additional Journal Information:: Journal Volume: 100; Journal Issue: 25; Other Information: DOI: 10.1103/PhysRevLett.100.255005; (c) 2008 The American Physical Society; Country of input: International Atomic Energy Agency (IAEA); Journal ID: ISSN 0031-9007

Country of Publication:: United States

Language:: English

Subject:: 70 PLASMA PHYSICS AND FUSION TECHNOLOGY; E CODES; GEOMETRY; ITER TOKAMAK; M CODES; MAGNETOHYDRODYNAMICS; PLASMA; PLASMA SIMULATION; REVERSE-FIELD PINCH; REVERSED-FIELD PINCH DEVICES; THREE-DIMENSIONAL CALCULATIONS

Citation Formats


                    Villone, F, Liu, Y Q, Paccagnella, R, Bolzonella, T, and Rubinacci, G. Effects of Three-Dimensional Electromagnetic Structures on Resistive-Wall-Mode Stability of Reversed Field Pinches.  United States: N. p., 2008. 
        Web.  doi:10.1103/PHYSREVLETT.100.255005.

Copy to clipboard


                    Villone, F, Liu, Y Q, Paccagnella, R, Bolzonella, T, & Rubinacci, G. Effects of Three-Dimensional Electromagnetic Structures on Resistive-Wall-Mode Stability of Reversed Field Pinches.  United States.  https://doi.org/10.1103/PHYSREVLETT.100.255005

Copy to clipboard


                    Villone, F, Liu, Y Q, Paccagnella, R, Bolzonella, T, and Rubinacci, G. 2008.  
        "Effects of Three-Dimensional Electromagnetic Structures on Resistive-Wall-Mode Stability of Reversed Field Pinches".  United States.  https://doi.org/10.1103/PHYSREVLETT.100.255005.

Copy to clipboard


                    
@article{osti_21134079,

  title        = {Effects of Three-Dimensional Electromagnetic Structures on Resistive-Wall-Mode Stability of Reversed Field Pinches},

  author       = {Villone, F and Liu, Y Q and Paccagnella, R and Bolzonella, T and Rubinacci, G},

  abstractNote = {In this Letter, the linear stability of the resistive wall modes (RWMs) in toroidal geometry for a reversed field pinch (RFP) plasma is studied. Three computational models are used: the cylindrical code ETAW, the toroidal MHD code MARS-F, and the CarMa code, able to take fully into account the effects of a three-dimensional conducting structure which mimics the real shell geometry of a reversed field pinch experimental device. The computed mode growth rates generally agree with experimental data. The toroidal effects and the three-dimensional features of the shell, like gaps, allow a novel interpretation of the RWM spectrum in RFP's and remove its degeneracy. This shows the importance of making accurate modeling of conductors for the RWM predictions also in future devices such as ITER.},

  doi          = {10.1103/PHYSREVLETT.100.255005},

  url          = {https://www.osti.gov/biblio/21134079},
  journal      = {Physical Review Letters},

  issn         = {0031-9007},

  number       = 25,

  volume       = 100,

  place        = {United States},

  year         = {Fri Jun 27 00:00:00 EDT 2008},

  month        = {Fri Jun 27 00:00:00 EDT 2008}

}

Copy to clipboard

Journal Article:

https://doi.org/10.1103/PHYSREVLETT.100.255005

Other availability

Find in Google Scholar

Search WorldCat to find libraries that may hold this journal

Save / Share:

Export Metadata

Save to My Library

Similar records in OSTI.GOV collections:

Drift kinetic effects on the resistive wall mode stability-Comparison between reversed field pinches and tokamaks

Journal Article Wang, Z; Guo, S; Liu, Y - Physics of Plasmas

The physics of kinetic effects on the resistive wall mode (RWM) stability is studied, and a comparison between reversed field pinch (RFP) and Tokamak configurations is made. The toroidal, magnetohydrodynamic (MHD)-kinetic hybrid stability code MARS-K, in which the drift kinetic effects are self-consistently incorporated into the MHD formulation, is upgraded with an extensive energy analysis module. In the tokamak configuration, the kinetic effect can stabilize the mode with very slow, or vanishing plasma rotation, due to the mode resonance with the toroidal precession drift of thermal trapped particles. In RFP, instead, stabilization of the RWM comes mainly from the ionmore »« less
https://doi.org/10.1063/1.4737200
Resistive wall modes in a reversed field pinch

Miscellaneous Greene, P

Experimental measurements of resistive wall modes in the Reversatron II reversed field pinch are presented. The reversed field pinch (RFP) is a toroidal, magnetic confinement device for controlled fusion. Theoretical and computational stability analysis show that a close fitting, conducting shell is a necessary condition for stability in the RFP. The Reversatron II is operated with a shell positioned at 1.25 times the minor radius, with a penetration time for a vertical field, [tau][sub s], of either 200 [mu]sec or 600 [mu]sec. Arrays of magnetic diagnostics are used to determine the magnetic fields created by instabilities in the discharges. Lasermore »« less
Change of Paradigm for the Reversed Field Pinch

Journal Article Escande, D - AIP Conference Proceedings

The reversed field pinch (RFP) is a magnetic configuration germane to the tokamak, but it produces most of its magnetic field by the currents flowing inside the plasma; external coils provide only a small edge toroidal field whose sign is reversed with respect to the central one, whence the name of the configuration. Because of the presence of magnetic turbulence and chaos, the RFP had been considered for a long period as a terrible confinement configuration. However, recently a change of paradigm occurred for this device. Indeed, when the toroidal current is increased in the RFX-mod RFP in Padua (Italy),more »« less
https://doi.org/10.1063/1.3526166
Reversed field pinch dynamics and transport studies. Quarterly progress report, 20 July 1983-20 October 1983

Technical Report Schnack, D

Progress in RFP dynamics and transport studies is described. The compressible, three-dimensional code SPECTR3 has been modified to include toroidal effects, and classical resistivity and thermal conductivity. Anomalous transport arising from stochastic magnetic fields has been included in the model. These transport effects are treated implicitly. A three-dimensional, incompressible MHD code has been developed. It is computationally more efficient than the existing code, and will be used extensively if compessibility is determined to be unimportant. Post-processor codes to analyze data generated by the nonlinear code have been developed. Three-dimensional computer runs at low THETA (= B/sub theta/(a)/) have found themore »« less
Equilibrium and transport for quasi-helical reversed field pinches

Journal Article Cappello, Susanna; Bonfiglio, Daniele; Escande, Dominique; ... - Nuclear Fusion

This paper presents the most recent results in theoretical/numerical studies on the physics of the quasi-helical regime in reversed field pinch (RFP) configurations. Such regime systematically characterizes RFX-mod experiments at high currents (Ip > 1.2 MA), producing clear internal electron transport barriers. Several approaches, ranging from a macroscopic (MHD) to a microscopic (transport) description, have been used to tackle the related complex physics. From the macroscopic point of view, we derive analytically the electrostatic velocity field consistent with a generic helical ohmic equilibrium. We also provide the first MHD initial-value simulation results in toroidal geometry obtained with the PIXIE3D code.more »« less
https://doi.org/10.1088/0029-5515/51/10/103012

Similar Records