dorsal/arxiv
View SchemaAn equilibrium model for RFP plasmas in the presence of resonant tearing modes with an application to particle and heat transport
| Authors | P. Zanca, F. Sattin, E. Martines |
|---|---|
| Categories | |
| ArXiv ID | physics/0309114 |
| URL | https://arxiv.org/abs/physics/0309114 |
Abstract
The equilibrium of a finite-beta cylindrical RFP plasma in the presence of saturated-amplitude tearing modes is investigated. The singularities arising from the perturbative analysis of the MHD force balance equation JxB=grad(p) are resolved through a proper regularization of the cylindrical symmetric component of the pressure and parallel current density profiles, by setting to zero their gradient at the modes rational surfaces. An equilibrium model, which satisfies the regularization rule at the various rational surfaces, is developed. The comparison with the experimental data from the Reversed Field eXperiment (RFX) gives encouraging results. The model provides an easy tool to extrapolate the magnetic data, ordinarily measured only at the plasma edge, inside the plasma. As an application, we present the computation of the particle and heat stochastic diffusion coefficient from the reconstructed magnetic field profile.
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"date_created": "2026-03-02T18:00:46.560000Z",
"date_modified": "2026-03-02T18:00:46.560000Z",
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"abstract": "The equilibrium of a finite-beta cylindrical RFP plasma in the presence of\nsaturated-amplitude tearing modes is investigated. The singularities arising\nfrom the perturbative analysis of the MHD force balance equation JxB=grad(p)\nare resolved through a proper regularization of the cylindrical symmetric\ncomponent of the pressure and parallel current density profiles, by setting to\nzero their gradient at the modes rational surfaces. An equilibrium model, which\nsatisfies the regularization rule at the various rational surfaces, is\ndeveloped. The comparison with the experimental data from the Reversed Field\neXperiment (RFX) gives encouraging results. The model provides an easy tool to\nextrapolate the magnetic data, ordinarily measured only at the plasma edge,\ninside the plasma. As an application, we present the computation of the\nparticle and heat stochastic diffusion coefficient from the reconstructed\nmagnetic field profile.",
"arxiv_id": "physics/0309114",
"authors": [
"P. Zanca",
"F. Sattin",
"E. Martines"
],
"categories": [
"physics.plasm-ph"
],
"title": "An equilibrium model for RFP plasmas in the presence of resonant tearing modes with an application to particle and heat transport",
"url": "https://arxiv.org/abs/physics/0309114"
},
"schema_id": "dorsal/arxiv",
"source": {
"execution_id": "6b02dbdc-5555-48a7-a08b-901984465a09",
"id": "arXiv Dataset IDs",
"type": "Model",
"variant": "snapshot-2026-03-01",
"version": "0.1.0"
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