TITLE

Magnetic drift kinetic damping of the resistive wall mode in large aspect ratio tokamaks

AUTHOR(S)
Yueqiang Liu; Chu, M. S.; Gimblett, C. G.; Hastie, R. J.
PUB. DATE
September 2008
SOURCE
Physics of Plasmas;Sep2008, Vol. 15 Issue 9, p092505
SOURCE TYPE
Academic Journal
DOC. TYPE
Article
ABSTRACT
An analytical, large aspect ratio, calculation of the drift-kinetic energy perturbation is carried out for the resistive wall mode, due to the mode resonance with the magnetic precession drifts of trapped thermal ions and electrons. Four asymptotic cases are identified and analyzed in detail. Generally, a partial stabilization of the mode is possible thanks to the kinetic correction to the perturbed plasma energy. A complete stabilization can occur only in a narrow space of the plasma equilibrium parameters. Kinetic destabilization of the mode is also possible due to a finite pressure correction to the precession drift frequency.
ACCESSION #
34621638

 

Related Articles

  • Suppression of the Neoclassical Tearing Modes in Tokamaks under Anomalous Transverse Transport Conditions when the Magnetic Well Effect Predominates over the Bootstrap Drive. Konovalov, S. V.; Mikhailovskii, A. B.; Shirokov, M. S.; Ozeki, T.; Tsypin, V. S. // Plasma Physics Reports;Aug2005, Vol. 31 Issue 8, p621 

    A study is made of the suppression of neoclassical tearing modes in tokamaks under anomalous transverse transport conditions when the magnetic well effect predominates over the bootstrap drive. It is stressed that the corresponding effect, which is called the compound suppression effect, depends...

  • Effect of flow damping on drift-tearing magnetic islands in tokamak plasmas. Fitzpatrick, R.; Waelbroeck, F. L. // Physics of Plasmas;Jul2009, Vol. 16 Issue 7, p072507 

    A systematic fluid theory of nonlinear drift-tearing magnetic island dynamics in a conventional large aspect-ratio low-β circular cross-section tokamak plasma is derived from a set of single-helicity reduced neoclassical-magnetohydrodynamical equations which incorporate electron and ion...

  • Improved Measurements of ICRF Antenna Input Impedance at ASDEX Upgrade during ICRF Coupling Studies. Stepanov, I.; Noterdaeme, J.-M.; Bobkov, V.; Coster, D.; Faugel, H.; Bilato, R.; Brambilla, M.; Suttrop, W.; Kallenbach, A.; Schweinzer, J.; Wolfrum, E.; Fischer, R.; Mlynek, A.; Nikolaeva, V.; Guimarais, L.; Milanesio, D. // AIP Conference Proceedings;2014, Vol. 1580, p275 

    A new set of diagnostics has been implemented on ASDEX Upgrade to measure the input impedance of the ICRF antennas, in the form of a voltage and current probe pair installed on each feeding line of every antenna. Besides allowing the measurement of the reflection coefficient Τ of each antenna...

  • Fluid description of electron temperature gradient driven drift modes. Singh, R.; Tangri, Varun; Nordman, H.; Weiland, J. // Physics of Plasmas;Oct2001, Vol. 8 Issue 10 

    The electron temperature gradient (ETG) driven drift mode is studied using an advanced fluid model retaining effects of nonadiabatic ions, Debye shielding and the electron diamagnetic heat flow. The derived eigenmode equation is solved analytically in the strong ballooning limit. Both the...

  • A drift-magnetohydrodynamical fluid model of helical magnetic island equilibria in the pedestals of H-mode tokamak plasmas. Fitzpatrick, R.; Waelbroeck, F. L. // Physics of Plasmas;Jun2010, Vol. 17 Issue 6, p062503 

    A drift-magnetohydrodynamical (MHD) fluid model is developed for an isolated, steady-state, helical magnetic island chain, embedded in the pedestal of a large aspect ratio, low-β, circular cross section, H-mode tokamak plasma, to which an externally generated, multiharmonic, static magnetic...

  • Formation of quadrupolar vortices in ion-temperature-gradient modes. Qamar, Anisa; Mirza, Arshad M.; Murtaza, G.; Vranjesˇ, J.; Sakanaka, P. H. // Physics of Plasmas;Jul2003, Vol. 10 Issue 7, p2819 

    Nonlinear equations which govern the dynamics of low-frequency (ω≪ω[SUBci]), ion-temperature-gradient modes in the presence of equilibrium density, temperature, magnetic field, and electrostatic potential gradients are derived. For some specific profiles of the equilibrium flow...

  • Zonal flow and field generation by finite β drift waves: Finite ion temperature effects. Guzdar, P. N.; Kleva, R. G.; Chakrabarti, N. // Physics of Plasmas;Jun2004, Vol. 11 Issue 6, p3324 

    The generation of zonal flows and zonal fields by finite β drift waves in plasmas with finite ion temperature Ti is investigated. This work extends our earlier work with zero ion temperature. The growth rate of the zonal flow and field is enhanced by finite Ti effects. This leads to a...

  • Broadband density fluctuation measurements using a heavy ion beam probe on the Texas Experimental... Heard, J.W.; Crowley, T.P.; Schoch, P.M.; Hickok, R.L.; Ross, David W.; Zhang, B.Z.; Yang, X.Z. // Physics of Plasmas;Sep95, Vol. 2 Issue 9, p3360 

    Discusses the measurement of broad bandwidth, long wavelength density fluctuation using a heavy ion beam probe on the Texas Experimental Tokamak. Finding that fluctuation amplitudes and correlation length scalings do not correspond to linear or quasilinear drift wave theory; Power-weighted...

  • Atomic wall recombination and volume negative ion production. Pagano, Damiano; Gorse, Claudine; Capitelli, Mario // Review of Scientific Instruments;Mar2006, Vol. 77 Issue 3, p03A505 

    The development of a numerical code for the modeling of negative ion sources requires the knowledge of a lot of processes occurring both in the gas phase and at the surface. The present work concerns the effect of surface processes (in particular atomic wall recombination) on the kinetics of...

Share

Read the Article

Courtesy of THE LIBRARY OF VIRGINIA

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

Try another library?
Sign out of this library

Other Topics