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2 edition of Dependence of ideal MHD kink and ballooning modes on plasma shape and profiles in tokamaka found in the catalog.

Dependence of ideal MHD kink and ballooning modes on plasma shape and profiles in tokamaka

Princeton University. Plasma Physics Laboratory

Dependence of ideal MHD kink and ballooning modes on plasma shape and profiles in tokamaka

by Princeton University. Plasma Physics Laboratory

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  • 19 Currently reading

Published by Dept. of Energy, Plasma Physics Laboratory, for sale by the National Technical Information Service] in Princeton, N.J, [Springfield, Va .
Written in English

    Subjects:
  • Tokamaks,
  • Magnetohydrodynamics

  • Edition Notes

    StatementA. M. M. Todd ... [et al.], Princeton University Plasma Physics Laboratory
    SeriesPPPL ; 1470
    ContributionsTodd, A. M. M, United States. Dept. of Energy
    The Physical Object
    Pagination38 p. :
    Number of Pages38
    ID Numbers
    Open LibraryOL14882463M

    Nonlinear MHD Dynamics Of Tokamak Plasmas On Multiple Time Scales S.E. Kruger 1), D.D. Schnack 1), D.P. Brennan 2), T.A. Gianakon 3), C.R. Sovinec 4) with the ideal modes growing on the Alfvenic time scale, and the cally driven due to a sharp increase in ∆0 when the plasma is near an ideal MHD stability boundary. To test the theory. Avoiding a toroidal plasma current brings great advantages for plasma stability. Indeed, magnetohydrodynamic (MHD) stability plays a far less prominent role in stellarators than in tokamaks, where the toroidal current causes kink modes, sawteeth and resistive and neoclassical tearing modes that all limit the plasma by:

    1 E ect of magnetic perturbations on the 3D MHD self-organization of shaped tokamak plasmas D. Bon glio1, S. Cappello1, M. Veranda1, L. Chac on2 and D. F. Escande3,1 1Consorzio RFX, Padova, Italy 2Los Alamos National Laboratory, Los Alamos, New Mexico , USA 3Aix-Marseille Universit e, CNRS, PIIM, UMR , Marseille, France Corresponding Author: [email protected] Poloidal velocity of MHD modes at the edge of the ASDEX Upgrade tokamak S. da Gra ca 1, G.D. Conway 2, E. Viezzer 2, A. Silva 1, L. Cupido 1, M. E. Manso 1 and the ASDEX Upgrade Team 2 1 Associa c~ao EURATOM / IST, Instituto de Plasmas e Fus~ao Nuclear, Instituto Superior Tecnic o/Universidade Tecnic a de Lisboa, P,Lisboa, Portugal.

    Transport equations in tokamak plasmasa J. D. Callen,b C. C. Hegna, and A. J. Cole University of Wisconsin, Madison, Wisconsin , USA Received 20 November ; accepted 29 December ; published online 8 April Tokamak plasma transport equations are usually obtained by flux surface averaging the collisional Braginskii equations. plasma{vacuum interface exists and a region formed of low temperature plasma is present around the hot core [17]. Each of the two di ering assumptions about the plasma boundary represents a limiting description of the real behaviour. With the ideal MHD model if a limiter plasma moves away from the wall, the current density.


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Dependence of ideal MHD kink and ballooning modes on plasma shape and profiles in tokamaka by Princeton University. Plasma Physics Laboratory Download PDF EPUB FB2

Get this from a library. Dependence of ideal MHD kink and ballooning modes on plasma shape and profiles in tokamaka. [A M M Todd; Princeton University. Plasma Physics Laboratory.; United States. Department of Energy.]. ga–a dependence of edge stability on plasma shape and local pressure gradients in the diii–d and jt–60u tokamaks by l.l.

lao, y.l kamada, t. oikawa, l.r. baylor, k.h. burrell. Plasma Science and Technology, Vol, No.6, Jun. GTC Simulation of Ideal Ballooning Mode in Tokamak Plasmas⁄ LI Zebin (李泽彬)1, SUN Guoya (孙国亚)1, Ihor HOLOD2, XIAO Yong (肖湧)3, ZHANG Wenlu (张文禄)4, LIN Zhihong (林志宏)2;5 1Department of Physics, and Institute of Theoretical Physics and Astrophysics, Xiamen University, XiamenChina.

Aiba N. et al., The Effect of the Aspect Ratio on the External Kink-Ballooning Instability in High-β Tokamaks 3 BB R ttR c c =×, 0 0 (3) II R ppR c c 0 ×, 0 (4) where R c is the major radius and the subscript 0 means the values when the aspect ratio A =as B t0 = and R c0 = Tokamak D-T neutron source models for different plasma physics confinement modes Article (PDF Available) in Fusion Engineering and Design 87(s 5–6)– August with Reads.

A calculation of the nonlinear state of the m=n=1 internal kink mode within the ideal magnetohydrodynamic approximation is presented. The nonlinear problem is divided into a layer around the q=1 surface and an outer region.

An examination of the nonlinear terms from the two regions shows that within the optimal ordering of the linear theory, nonlinear terms from the outer region are formally Cited by: 5.

Automated Characterization of Rotating MHD Modes and Subsequent Locking in a Tokamak (J.D. Riquezes, et al.) th 2 Motivation Disruption avoidance in tokamaks is highly desired to maintain steady plasma operation and to avoid potential damage to device. @article{osti_, title = {The role of plasma rotation on MHD instabilities in tokamaks}, author = {Varadarajan, V and Miley, G H}, abstractNote = {An improved analysis of the linear stage of the internal kink mode has been developed to include plasma rotation and finite aspect ratio effects.

The linear instabiliy growth rates are increased by the plasma rotation. ELSEVIER Physics Letters A () 11 December PHYSICS LETTERS A External kink modes in a tokamak with a resistive wall and a high-beta rotating plasma A.B.

Mikhailovskii, B.N. Kuvshinov Institute of Nuclear Fusion, RRC "Kurchatov Institute", Moscow, Russian Federation Received 20 March ; accepted for publication 13 October Communicated by M. Porkolab Cited by: 4. ux theorem of ideal MHD and can allow slowly growing, radially isolated tearing-type (clas-sical r~J t-driven and neoclassical r~P-driven) macroinstabilities.

These modes can cause magnetic island topologies to develop in the plasma which sometimes continue to grow and violently dis-rupt plasma con nement, i.e., lead to a plasma \disruption.". MHD Instabilities during Current Ramp Up as a Function of Plasma Shape in the TCV Tokamak A.

Scarabosio, A. Pochelon, Y. Martin Centre de Recherches en Physique des Plasmas, Ecole Polytechnique Fédéral de Lausanne Association EURATOM-Confédération Suisse. the MH3D-T results for equilibrium profiles p, = pi.

Triangles show the MH3D- T case with p, = 0, illustrating the destabilizing effect of o*. (b)Direction of the m = 1, n = 1 plasma kink flow relative to the reconnection X-point in a poloidal cross section.

Circles represent the ion fluid flow v; and diamonds theCited by: 1. Active Feedback Control of Kink Modes in Tokamaks: 3D VALEN Modeling and HBT-EP Experiments* D.

Maurer, J. Bialek, A. Boozer, C. Cates, O. Katsuro-Hopkins, Y. Liu, M. Mauel, Control of long-wavelength MHD instabilities using conducting walls and external than the plasma are not able to reach the ideal wall performance limit.

This. The geometrical parameters also differ much for tokamaks and stellarators. In tokamaks the aspect ratio R/a (R and a represent the major and minor radii, respectively) is usually in a range of –4, and the value is even smaller for spherical tokamaks.

In stellarators, to avoid resonances between the field lines and harmonics of the symmetry of the configuration, the device is designed to Cited by: 7. Surface currents associated with external kink modes in tokamak plasmas during a major disruption the surface current in recent theoretical calculations based on idealized step-function background plasma profiles.

We revisit such calculations by replacing step-function profiles with more realistic profiles characterized by a strong but Cited by: 2. A study of the ideal-MHD stability is done for plasmas modeled after DIII-D advanced tokamak plasmas, varying the plasma elongation, triangularity, and outboard squareness.

The highest beta(sub)N limits reach for the n=1 kink mode for all elongation, outer squareness values, and plasma triangularity equals Cited by: 4. Simulations of drift resistive ballooning L-mode turbulence in the edge plasma of the DIII-D tokamak B.

Cohen, M. Umansky, W. Nevins, M. Makowski, J. Boedo et al. Simulations of drift resistive ballooning L-mode turbulence in the edge plasma of the DIII-D tokamaka) that provide drive mechanisms for collective modes of insta.

CREATE-L, a simple and reliable linearized plasma response model for the control of the plasma current, position and shape in tokamaks, is presented.

The basic assumption made is that the plasma behaviour is described using three degrees of freedom, related to. Modelling of tokamak plasma with SOL: MHD stability with nite current density at the separatrix ov 1, ev 1;2, 1, honov 1 1 Keldysh Institute of Applies Mathematics, Russian Academy of Sciences, Moscow, Russia 2 National Research Nuclear University MEPhI, Moscow, Russia For integrated modeling of equilibrium, stability and dynamics of the tokamak.

Moreau IEA W59 Shape and Aspect Ratio Optimization for High Beta, Steady-State Tokamaks, San Diego, February PLASMA SHAPE, PROFILES AND FLUX CONTROL FOR HIGH-BOOTSTRAP STEADY STATE TOKAMAKS EFDA-JET CSU, Culham Science Centre, Abingdon, OX14 3DB, U.

Euratom-CEA Association, CEA-Cadarache,St Paul lez Durance, France. Ballooning instabilities in a Heliotron J plasma Osamu Yamagishi,a) Yuji Nakamura, and Katsumi Kondo Graduate School of Energy Science, Kyoto University, Uji, KyotoJapan ~Received 5 January ; accepted 28 February !

Ideal magnetohydrodynamic stability analysis of local pressure-driven modes in anL51 heliotron.Self-consistent Modeling of the Pedestal in Tokamak Plasmas 1 Lehigh University, Bethlehem, PA 2 New York University, NY 3 California Institute of Technology, CA 4 ORNL, Knoxville, TN 5 University of California at Davis, CA 6 Lawrence Livermore National Laboratory, CA 7 PPPL, Princeton, NJ 8 General Atomics, San Diego, CA 9 University of Wisconsin, Madison, WI A.Y Pankin1, G.

Bateman1, C.S File Size: 2MB.the higher order ballooning theory has also captured other types of less unstable global modes: (a) the weakly asymmetric ballooning theory (WABT) predicts a mixed mode (MM) that undergoes a small poloidal shift away from the outboard mid-plane, (b) a relatively more stable general mode (GM) balloons on the top (or bottom) of the tokamak plasma.