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Start Over Descriptor "error fields" Journal ieee transactions on magnetics
3 results on '"error fields"'

1. Error Fields’ Computation in the RFX-mod2 Reversed Field Pinch.

Author

Bettini, Paolo, Marrelli, Lionello, Voltolina, Dimitri, Cavazzana, Roberto, Marchiori, Giuseppe, Marconato, Nicolo, Specogna, Ruben, Spizzo, Gianluca, Torchio, Riccardo, and Zanca, Paolo

Subjects
*REVERSIBLE computing, *MAGNETIC domain, *MAGNETIC resonance, *MAGNETIC fields, *EDDIES
Abstract

The aim of this article is to describe and model a sawtooth crash in RFX-mod2 and compute the eddy currents induced in the stabilizing shell surrounding the plasma for two alternative gap concepts and the subsequent error field. The sawtooth crash displacement of the plasma column is represented by a vacuum model coupled with a suitable magneto-quasi-static (MQS) volume integral (VI) formulation. [ABSTRACT FROM AUTHOR]

Published
2021
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2. Error Fields’ Computation in the RFX-mod2 Reversed Field Pinch

Author

Paolo Bettini, Lionello Marrelli, Nicolò Marconato, Ruben Specogna, Giuseppe Marchiori, P. Zanca, Riccardo Torchio, Roberto Cavazzana, Gianluca Spizzo, and Dimitri Voltolina

Subjects
Computer crashes, eddy currents, Eddy currents, error fields, Faces, integral formulations, Magnetic domains, Magnetic resonance, MHD, Plasmas, Toroidal magnetic fields, Computation, Shell (structure), magnetohydrodynamics (MHDs), Sawtooth wave, 01 natural sciences, Displacement (vector), Volume integral, law.invention, Physics::Plasma Physics, law, 0103 physical sciences, Eddy current, Electrical and Electronic Engineering, 010302 applied physics, Physics, Reversed field pinch, Plasma, Mechanics, Electronic, Optical and Magnetic Materials
Abstract

An accurate control of the magnetic boundary ofa thermonuclear plasma is an important issue in magnetic confinement research. The development of methods for the active control of magnetohydrodynamic instabilities and correction oferror fields is mandatory. A substantial modification of the layoutof the RFX-mod device is in progress: the aim of this paper isto assess the potential advantages of the proposed solution with advanced numerical techniques based on integral formulations.

Published
2021

3. Error Field Impact on Plasma Boundary in ITER Scenarios.

Author

Barbato, L., Formisano, A., Martone, R., and Villone, F.

Subjects
*MAGNETIC fields, *ERROR analysis in mathematics, *FIELD theory (Physics), *IMPACT (Mechanics), *PLASMA boundary layers
Abstract

Discrepancies in magnetic field maps produced by confinement coils in thermonuclear fusion reactors may drive plasma to lose stability and must be carefully controlled during the whole time evolution of each shot using suitable correction coils. Even when kept below safety thresholds, these error fields (EFs) may alter the geometry of magnetic flux lines, defining the plasma geometry. This paper, using high accuracy 3-D magnetic field computations for confinement coils, addresses the issue of evaluating the effect of EFs on the plasma boundary shape during the shot, modeled as a sequence of equilibrium configurations. In particular, a procedure that can compute the shape perturbations due to given deformations of the coils has been set up and used to carry out an analysis of relationship between the EF and shape perturbations during the time evolution of International Tokamak Experimental Reactor programmed scenario. [ABSTRACT FROM AUTHOR]

Published
2016
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