Výsledky vyhledávání

Nonlinear extended magnetohydrodynamics simulation using high-order finite elements

Autor: C R Sovinec, D D Schnack, A Y Pankin, D P Brennan, H Tian, D C Barnes, S E Kruger, E D Held, C C Kim, X S Li, D K Kaushik, S C Jardin, the NIMROD Team

Publikováno v: Journal of Physics: Conference Series. 16:25-34

Peak performance for magnetically confined fusion plasmas occurs near thresholds of instability for macroscopic modes that distort and possibly disrupt equilibrium conditions. In some cases, however, the best approach is to exceed stability threshold

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::75e98c72eb5e33599a966d80e85b737b
https://doi.org/10.1088/1742-6596/16/1/003

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Feedback studies on resistive wall modes in the reversed field pinch

Autor: Ming-Sheng Chu, R. Paccagnella, D. D. Schnack

Publikováno v: Physics of plasmas 9 (2002): 234–242.
info:cnr-pdr/source/autori:R. Paccagnella 1, D.D. Schnack 5, M.S. Chu 6/titolo:Feedback studies on resistive wall modes in the reversed field pinch/doi:/rivista:Physics of plasmas/anno:2002/pagina_da:234/pagina_a:242/intervallo_pagine:234–242/volume:9

A single fluid nonlinear magnetohydrodynamic cylindrical model is considered in this paper in order to study the problem of feedback stabilization of the nonresonant m = 1 ideal kinks in a reversed field pinch. The ideal growth rates are "passively"

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::f0904ba5f65f9a9513cd7bd51e06ceb6
https://doi.org/10.1063/1.1427725

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Numerical studies of confinement scaling in the conventional reversed field pinch

Autor: D. D. Schnack, Jan Scheffel

Publikováno v: Nuclear Fusion. 40:1885-1896

Scaling laws for reversed field pinch (RFP) confinement parameters versus plasma current and density are found from computer simulations. The RFP dynamics at high Lundquist numbers approaching 106 is studied using a high resolution, 3-D, resistive MH

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::aa0102832897c204e0b5787d993a314d
https://doi.org/10.1088/0029-5515/40/11/308

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The NIMROD code: a new approach to numerical plasma physics

Autor: A H Glasser, C R Sovinec, R A Nebel, T A Gianakon, S J Plimpton, M S Chu, D D Schnack, the NIMROD Team

Publikováno v: Plasma Physics and Controlled Fusion. 41:A747-A755

NIMROD is a code development project designed to study long-wavelength, low-frequency, nonlinear phenomena in toroidal plasmas with realistic geometry and dynamics. The numerical challenges of solving the fluid equations for a fusion plasma are discu

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::5da81f656eff99b288ab817ea133e092
https://doi.org/10.1088/0741-3335/41/3a/067

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Reduction of loop voltage and magnetic field fluctuations due to toroidal rotation in the reversed field pinch

Autor: H. E. Sätherblom, James R. Drake, D. D. Schnack

Publikováno v: Plasma Physics and Controlled Fusion. 40:1775-1784

Results are presented from a three-dimensional (3D), nonlinear, resistive magnetohydrodynamic (MHD)-code study of thin shell modes (TSM) in a reversed field pinch (RFP), when toroidal plasma flow is introduced by adding a drag force in the toroidal m

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::ba6e5ee16ae9fbf8d08add796f20fb95
https://doi.org/10.1088/0741-3335/40/10/008

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Suppression ofm=2 islands by electron cyclotron heating in the Texas Experimental Tokamak: Experiment and theory

Autor: Amitava Bhattacharjee, X.‐H. Wang, D. L. Brower, D. D. Schnack, Max E Austin, D. C. Sing, J. Y. Chen, C. X. Yu, R. F. Gandy

Publikováno v: Physics of Fluids B: Plasma Physics. 5:3239-3245

Electron cyclotron heating (ECH) is used to suppress m=2 magnetohydrodynamic (MHD) oscillations in the Texas Experimental Tokamak (TEXT) [Nucl. Technol. Fusion 1, 479 (1981)]. The location of ECH power deposition is controlled by a movable antenna. T

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::c689e18cfb28e3f9c99e63cb6425e0a8
https://doi.org/10.1063/1.860659

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The thermal stability of coronal loops numerical simulations

Autor: G. Van Hoven, D. D. Schnack, Y. Mok

Publikováno v: Solar Physics. 132:95-108

The radiative stability of thermally isolated coronal loops with free-flow boundary conditions by nonlinear numerical simulation are studied. A chromosphere-to-corona loop equilibrium (including the option of a deep chromosphere) is first established

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::cac6c3656d1649405403722f04b58bb9
https://doi.org/10.1007/bf00159132

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Comparison of kinetic and extended magnetohydrodynamics computational models for the linear ion temperature gradient instability in slab geometry

Autor: D. D. Schnack, Scott Parker, D. C. Barnes, J. Cheng

Publikováno v: Physics of Plasmas. 20:062106

We perform linear stability studies of the ion temperature gradient (ITG) instability in unsheared slab geometry using kinetic and extended magnetohydrodynamics (MHD) models, in the regime k∥/k⊥≪1. The ITG is a parallel (to B) sound wave that m

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::f0002ff4215ec4fa89c717f6e9173094
https://doi.org/10.1063/1.4811468

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Transport and dynamics in toroidal fusion systems. Final report, 1992--1995

Autor: D. D. Schnack

This document is organized as follows. Discussions are presented on the properties of structured and unstructured meshes, and the data structures useful for describing them. Issues related to the triangulation of an arbitrary set of points in a plane

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::a6c288a52f354d212a9524b99831f7b4
https://doi.org/10.2172/197166

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