Linear Stability of Resistive MHD Modes: Axisymmetric Toroidal Computation of the Outer Region Matching Data

Pletzer, A.; Bondeson, A.; Dewar, R. L.

doi:10.1006/jcph.1994.1215

Cited by 63 publications

(44 citation statements)

References 3 publications

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“…the difference between two energies, one involving the small solution and the other the large solution [9]. Since these two energy components often are comparable but of opposite sign, care should be taken to ensure that the computed ∆ is accurate.…”

Section: Discussionmentioning

confidence: 99%

“…A program, ANTYEM, calling PEST-3 [9] and routines from NIMROD [10] has been developed in order to obtain a more accurate calculation of the right hand side (RHS) of Equation Also, a new visualization program, HELUX, takes the output of PEST-3 and allows the user to specify island width, rational surface, and amount of detail near the perturbed surface to view the total helical flux as a contour plot.…”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Modeling of Neoclassical Tearing Mode Stability for Generalized Toroidal Geometry

Rosenberg

Gates²,

Pletzer³

et al. 2002

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Section: Discussionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Modeling of Neoclassical Tearing Mode Stability for Generalized Toroidal Geometry

Rosenberg

Gates²,

Pletzer³

et al. 2002

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“…These include modules for equilibrium (EFIT), MHD stability (GATO [26], PEST-3 [27]), transport (ONETWO and GCNMP [28]), ray-tracing (GENRAY [29]) and turbulent stability (GSK [30], TGLF [31]). …”

Section: Examples Of Applicationmentioning

confidence: 99%

Integrated Modeling of Tokamak Experiments with OMFIT

Meneghini

Lao

2013

Plasma and Fusion Research

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One Modeling Framework for Integrated Tasks (OMFIT) is a framework that allows data to be easily exchanged among different codes by providing a unifying data structure. The main idea at the base of OMFIT is to treat files, data and scripts as a uniform collection of objects organized into a tree structure, which provides a consistent way to access and manipulate such collection of heterogeneous objects, independent of their origin. Within the OMFIT tree, data can be copied/referred from one node to another and tasks can call each other allowing for complex compound task to be built. A top-level Graphical User Interface (GUI) allowing users to manage tree objects, carry out simulations and analyze the data either interactively or in batch. OMFIT supports many scientific data formats and when a file is loaded into the framework, its data populates the tree structure, automatically endowing it with many potential uses. Furthermore, seamless integration with experimental management systems allows direct manipulation of their data. In OMFIT modeling tasks are organized into modules, which can be easily combined to create arbitrarily-large multi-physics simulations. Modules inter-dependencies are seamlessly defined by variables referencing tree locations among them. Creation of new modules and customization of existing ones is encouraged by graphical tools for their management and an online repository. High level Application Programmer Interfaces (APIs) enable users to execute their codes on remote servers and creation application-specific GUIs. Finally, within OMFIT it is possible to visualize experimental and modeling data for both quick analysis and publication purposes. Examples of application to the DIII-D tokamak are presented.

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“…The profile for the perturbed helical flux could also be obtained from a code such as PEST-3 [48] and could include such effects as non-zero edge displacement and calculations of the mode field in the vacuum region.…”

Section: Flux and Field In The Single Helicity Magnetic Island Modelmentioning

confidence: 99%

Internal Kink Mode Dynamics in High-beta NSTX Plasmas

Menard¹,

Bell²,

Fredrickson³

et al. 2004

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Abstract.Saturated internal kink modes have been observed in many of the highest toroidal β discharges of the National Spherical Torus Experiment (NSTX). These modes often cause rotation flattening in the plasma core, can degrade energy confinement, and in some cases contribute to the complete loss of plasma angular momentum and stored energy. Characteristics of the modes are measured using soft X-ray, kinetic profile, and magnetic diagnostics. Toroidal flows approaching Alfvénic speeds, island pressure peaking, and enhanced viscous and diamagnetic effects associated with high-β may contribute to mode non-linear stabilization. These saturation mechanisms are investigated for NSTX parameters and compared to experimental data.

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Linear Stability of Resistive MHD Modes: Axisymmetric Toroidal Computation of the Outer Region Matching Data

Cited by 63 publications

References 3 publications

Modeling of Neoclassical Tearing Mode Stability for Generalized Toroidal Geometry

Modeling of Neoclassical Tearing Mode Stability for Generalized Toroidal Geometry

Integrated Modeling of Tokamak Experiments with OMFIT

Internal Kink Mode Dynamics in High-beta NSTX Plasmas

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