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DE2004828271

Publication Date	2004
Personal Author	Kolesnichenko, Y. I.; White, R. B.; Lutsenko, V. V.; Yakovenko, Y. V.
Page Count	42
Abstract	Effects of MHD reconnection events on the beam-plasma fusion reactivity and transport of the beam ions are studied. Based on the analysis of fusion reactivity changes induced by MHD events, the conclusion is drawn that the strong drops of the neutron yield during sawtooth crashes observed in the National Spherical Torus experiment (NSTX) are associated with both a particle redistribution inside the plasma and a loss of the beam ions. Mechanisms of the energetic ion transport during sawtooth crashes are analyzed, in particular, with the use of the resonance adiabatic invariant derived in this paper. A numerical simulation of the particle motion during a sawtooth crash in NSTX is done with the code OFSEF extended for a better description of the particle precession.
Keywords	Neutrons Ion beams Magnetohydrodynamics Plasma(Physics) Sawtooth crash Particles Tokamak devices Precession Resonance Simulation National Spherical Torus experiment(NSTX)
Source Agency	Technical Information Center Oak Ridge Tennessee
Corporate Authors	Princeton Univ., NJ. Plasma Physics Lab.; Department of Energy, Washington, DC.
Supplemental Notes	Sponsored by Department of Energy, Washington, DC.
Document Type	Technical Report
NTIS Issue Number	200512

Energetic Ion Transport and Concomitant Change of the Fusion Reactivity during Reconnection Events in Spherical Tori.

Energetic Ion Transport and Concomitant Change of the Fusion Reactivity during Reconnection Events in Spherical Tori.
DE2004828271

Publication Date	2004
Personal Author	Kolesnichenko, Y. I.; White, R. B.; Lutsenko, V. V.; Yakovenko, Y. V.
Page Count	42
Abstract	Effects of MHD reconnection events on the beam-plasma fusion reactivity and transport of the beam ions are studied. Based on the analysis of fusion reactivity changes induced by MHD events, the conclusion is drawn that the strong drops of the neutron yield during sawtooth crashes observed in the National Spherical Torus experiment (NSTX) are associated with both a particle redistribution inside the plasma and a loss of the beam ions. Mechanisms of the energetic ion transport during sawtooth crashes are analyzed, in particular, with the use of the resonance adiabatic invariant derived in this paper. A numerical simulation of the particle motion during a sawtooth crash in NSTX is done with the code OFSEF extended for a better description of the particle precession.
Keywords	Neutrons Ion beams Magnetohydrodynamics Plasma(Physics) Sawtooth crash Particles Tokamak devices Precession Resonance Simulation National Spherical Torus experiment(NSTX)
Source Agency	Technical Information Center Oak Ridge Tennessee
Corporate Authors	Princeton Univ., NJ. Plasma Physics Lab.; Department of Energy, Washington, DC.
Supplemental Notes	Sponsored by Department of Energy, Washington, DC.
Document Type	Technical Report
NTIS Issue Number	200512