TITLE

Moment approach to the bootstrap current in nonaxisymmetric toroidal plasmas using δf Monte Carlo methods

AUTHOR(S)
Matsuyama, A.; Isaev, M. Yu.; Watanabe, K. Y.; Hanatani, K.; Suzuki, Y.; Nakajima, N.; Cooper, W. A.; Tran, T. M.
PUB. DATE
May 2009
SOURCE
Physics of Plasmas;May2009, Vol. 16 Issue 5, p052501
SOURCE TYPE
Academic Journal
DOC. TYPE
Article
ABSTRACT
To evaluate the bootstrap current in nonaxisymmetric toroidal plasmas quantitatively, a δf Monte Carlo method is incorporated into the moment approach. From the drift-kinetic equation with the pitch-angle scattering collision operator, the bootstrap current and neoclassical conductivity coefficients are calculated. The neoclassical viscosity is evaluated from these two monoenergetic transport coefficients. Numerical results obtained by the δf Monte Carlo method for a model heliotron are in reasonable agreement with asymptotic formulae and with the results obtained by the variational principle.
ACCESSION #
40637894

 

Related Articles

  • Transport threshold model of neoclassical tearing modes in the presence of anomalous perpendicular viscosity. Konovalov, S. V.; Mikhailovskii, A. B.; Shirokov, M. S.; Tsypin, V. S. // Physics of Plasmas;Nov2002, Vol. 9 Issue 11, p4596 

    Bootstrap drive of neoclassical tearing modes (NTMs) in the presence of anomalous perpendicular viscosity is calculated. Viscosity is shown to lead to dependence of the perturbed bootstrap current on the perturbed electric field. As a result, the bootstrap drive is qualitatively modified by the...

  • Extended estimations of neoclassical transport for the TJ-II stellarator: The bootstrap current. Tribaldos, V.; Beidler, C. D.; Turkin, Y.; Maaßberg, H. // Physics of Plasmas;Oct2011, Vol. 18 Issue 10, p102507 

    This work extends previous Monte Carlo estimations of neoclassical transport for the TJ-II stellarator [V. Tribaldos, Phys. Plasmas 8, 1229 (2001)] to include, for the first time, the bootstrap current in low collisionality electron cyclotron resonance heated (ECRH) plasmas. The calculations are...

  • Nonlinear evolution of neoclassical double tearing mode. Yu, Qingquan // Physics of Plasmas;Apr97, Vol. 4 Issue 4, p1047 

    Presents a theory for the nonlinear neoclassical double tearing mode. Evolution mode for the locked islands and the islands with different rotation frequencies; Stabilizing effect of the perturbed bootstrap current on the inner island; Weak destabilizing effect on the outer island; Effects of...

  • Observation of the neoclassical current in the Small Heliac Experimental Apparatus (SHEILA). Zhang, B.C.; Blackwell, B.D.; Borg, G.G. // Physics of Plasmas;Nov97, Vol. 4 Issue 11, p3986 

    Presents the first measurements of internal currents in a toroidal heliac. Analysis of the toroidal current observed in the Small Heliac Experimental Apparatus; Measurement of the bootstrap current and the Pfirsch-Schluter current, the net toroidal component corresponding to the uni-directional...

  • Monte Carlo calculation of the neoclassical transport matrix by the Einstein–Helfand relation in nonaxisymmetric toroidal plasmas. Matsuyama, A.; Hanatani, K. // Physics of Plasmas;Mar2010, Vol. 17 Issue 3, p032501 

    A Monte Carlo method that calculates the neoclassical transport matrix with the pitch-angle scattering approximation is described for nonaxisymmetric toroidal plasmas. The numerical scheme is based on the Einstein–Helfand relation, which generalizes the calculation of the neoclassical...

  • Variational calculation of alpha-driven bootstrap current in a deutrium-tritium tokamak reactor. Hogun Jhang; Chang, C.S. // Physics of Plasmas;Oct96, Vol. 3 Issue 10, p3732 

    Examines a general analytic expression for bootstrap current driven by fusion-born alpha particles obtained in a deuterium-tritium tokamak plasma using a kinetic variational theory. Linearized Coulomb scattering operator used in the study; Prediction of alpha-driven bootstrap current in a...

  • Reduction of bootstrap current in the Modular Helias-like Heliac stellarator. Garabedian, P.R.; Gardner, H.J. // Physics of Plasmas;Jun95, Vol. 2 Issue 6, p2020 

    Discusses the implementation of a geometric estimate for the size of the bootstrap current in a plasma equilibrium code and its application to the Modular Helias-like Heliac stellarator. Predicted change in the rotational transform of the MHH due to the bootstrap current; Adoption of a three...

  • Stable equilibria for bootstrap-current-driven low aspect ratio tokamaks. Miller, R.L.; Lin-Liu, Y.R.; Turnbull, A.D.; Chan, V.S.; Pearlstein, L.D.; Sauter, O.; Villard, L. // Physics of Plasmas;Apr97, Vol. 4 Issue 4, p1062 

    Investigates stable equilibria for bootstrap-current-driven low aspect ratio tokamaks. Discussion of a high-power density compact fusion power plant concept; Conditions for ideal magnetohydrodynamic stability of a range of equilibria at aspect ratio 1.4.

  • Simulation of plasma molding over a ring on a flat surface. Doosik Kim, C.A.; Economou, Demetre J. // Journal of Applied Physics;9/15/2003, Vol. 94 Issue 6, p3740 

    Reports on the development of a fluid/Monte Carlo simulation model to study plasma molding over an axisymmetric feature resting on an otherwise planar surface in contact with a high-density radio frequency plasma. Prediction of the two-dimensional time-dependent sheath potential and ion density...

Share

Read the Article

Courtesy of VIRGINIA BEACH PUBLIC LIBRARY AND SYSTEM

Sorry, but this item is not currently available from your library.

Try another library?
Sign out of this library

Other Topics