TITLE

Energy channeling due to energetic-ion-driven instabilities in tokamak

AUTHOR(S)
Kuley, Animesh; Liu, C. S.; Tripathi, V. K.
PUB. DATE
March 2011
SOURCE
Physics of Plasmas;Mar2011, Vol. 18 Issue 3, p032503
SOURCE TYPE
Academic Journal
DOC. TYPE
Article
ABSTRACT
A kinetic formalism has been developed to study the emission of the destabilized ion Bernstein wave by the energetic α particles in the core region of the tokamak, with very peaked radial distribution. The destabilized waves are driven in the central region of the tokamak but are damped by the electrons in the outer due to the energy channeling.
ACCESSION #
59744143

 

Related Articles

  • Excitation of Alfvén eigenmodes by low energy beam ions in the DIII-D and JET tokamaks. Nazikian, R.; Gorelenkov, N. N.; Alper, B.; Berk, H. L.; Borba, D.; Budny, R. V.; Fu, G. Y.; Heidbrink, W. W.; Kramer, G. J.; Makowski, M. A.; Pinches, S. D.; Sharapov, S. E.; Solomon, W. M.; Strait, E. J.; White, R. B.; Van Zeeland, M. A. // Physics of Plasmas;May2008, Vol. 15 Issue 5, p056107 

    Core localized Alfvén eigenmodes in DIII-D [J. L. Luxon, Nucl. Fusion 42, 614 (2002)] and Joint European Torus (JET) [P. H. Rebut and B. E. Keen, Fusion Technol. 11, 13 (1987)] plasmas are driven by deuterium neutral beam ions traveling well below the Alfvén speed. Modes are observed in...

  • Weakly relativistic effect in the formation of ion-acoustic solitary waves in a positive ion-beam plasma. Kalita, B. C.; Das, R.; Sarmah, H. K. // Canadian Journal of Physics;Mar2010, Vol. 88 Issue 3, p157 

    Relativistic solitons are investigated in a plasma with positive-ion beams using the Korteweg–de Vries (KdV) equation considering relativistic effects smaller for γi ≍ O(v2/c2) and γe ≍ O(u2/c2), and larger for γi ≍ O(v4/c4) and γe ≍ O(u4/c4), where...

  • Electron heating via mode converted ion Bernstein waves in the Alcator C-Mod tokamak. Bonoli, P.T.; O'Shea, P.; Brambilla, M.; Golovato, S.N.; Hubbard, A.E.; Porkolab, M.; Takase, Y.; Boivin, R.L.; Bombarda, F.; Christensen, C.; Fiore, C.L.; Garnier, D.; Goetz, J.; Granetz, R.; Greenwald, M.; Horne, S.F.; Hutchinson, I.H.; Irby, J.; Jablonski, D. // Physics of Plasmas;May97, Vol. 4 Issue 5, p1774 

    Examines highly localized direct electron heating via mode converted ion Bernstein waves in the Alcator C-Mod Tokamak. Locations of the mode conversion layer and electron heating peak; Estimation of electron heating profiles using a radio frequency modulation technique; Importance of volumetric...

  • Toroidal rotation and radial electric field driven by the lower-hybrid-wave in a tokamak fusion reactor. Wang, Shaojie // Physics of Plasmas;Oct2011, Vol. 18 Issue 10, p102502 

    A theoretical model is proposed to interpret the counter-current rotation driven by the lower-hybrid-wave observed in the tokamak lower-hybrid-wave parallel current drive experiments. It is found that ions absorb the toroidal momentum indirectly from the wave through collisional friction with...

  • Neutral beams for the International Thermonuclear Experimental Reactor. Inoue, T.; Di Pietro, E.; Mondino, P. L.; Bayetti, P.; Hemsworth, R. S.; Massmann, P.; Fujiwara, Y.; Hanada, M.; Miyamoto, K.; Okumura, Y.; Watanabe, K.; Krylov, A.; Kulygin, V.; Panasenkov, A. // Review of Scientific Instruments;Feb2000, Vol. 71 Issue 2, p744 

    Deals with the use of a neutral beam system for the steady state operation of the International Thermonuclear Experimental Reactor. 'Negative central shear' configuration of the plasma; Most successful scheme used to heat magnetically confined plasmas in thermonuclear fusion research; Vacuum...

  • Effects of a weak ion beam on grid-launched ion-acoustic waves. Raychaudhuri, Santwana; Lonngren, Karl E. // Physics of Fluids (00319171);Jun85, Vol. 28 Issue 6, p2016 

    Experimentally observed multiple ion-acoustic wave excitation in a weak ion beam plasma system is described. An additional anomalous signal was observed to form and propagate hundreds of Debye lengths from the grid in a large quiescent plasma. The existence of this signal is interpreted to be...

  • Solitary waves in a warm plasma with negative ions and drifting effect of electrons. Kalita, B. C.; Devi, N. // Physics of Fluids B: Plasma Physics;Feb93, Vol. 5 Issue 2, p440 

    Propagation of ion-acoustic solitary waves in a warm plasma with negative ions under the drifting effect of electrons is considered. Compressive and rarefactive solitons are shown to exist depending on the drift velocity v’e of electrons for different values of Q’...

  • Efficient generation of noninductive, off-axis, Ohkawa current, driven by electron Bernstein waves in high β, spherical torus plasmas. Taylor, G.; Efthimion, P. C.; Kessel, C. E.; Harvey, R. W.; Smirnov, A. P.; Ershov, N. M.; Carter, M. D.; Forest, C. B. // Physics of Plasmas;Oct2004, Vol. 11 Issue 10, p4733 

    Off-axis rf-driven current can play a critical role in sustaining high β, spherical torus (ST) plasmas without a central solenoid. Numerical modeling of electron Bernstein wave current drive (EBWCD) for a β∼40% ST plasma predicts efficient, off-axis, Ohkawa EBWCD. Current can be...

  • Real-time electron density measurements from Cotton–Mouton effect in JET machine. Brombin, M.; Boboc, A.; Zabeo, L.; Murari, A.; JET-EFDA Contributors // Review of Scientific Instruments;Oct2008, Vol. 79 Issue 10, p10E718 

    Real-time density profile measurements are essential for advanced fusion tokamak operation and interferometry is a proven method for this task. Nevertheless, as a consequence of edge localized modes, pellet injections, fast density increases, or disruptions, the interferometer is subject to...

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