Alfven cascades with downward frequency sweeping

Journal Article · Fri Apr 15 00:00:00 EDT 2011 · Physics of Plasmas

DOI:https://doi.org/10.1063/1.3577568· OSTI ID:21537622

Marchenko, V S; Reznik, S N ^[1]

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1. Institute for Nuclear Research, Prospect Nauki 47, Kyiv 03680 (Ukraine)

It is suggested that relatively rare, but challenging for the existing theory Alfven cascades with downward frequency sweeping are actually the infernal Alfven eigenmodes (IAEs). Such modes exist in discharges with flat or weakly reversed q-profile in the broad central region, when the value of the safety factor in this region is slightly above the integer or low-order rational. Similar to the toroidal Alfven eigenmode, but in contrast to the ''conventional'' Alfven cascade with upward frequency sweeping, the spectrum of IAE is almost degenerate with respect to the mode numbers. Both features mentioned above are consistent with experimental observations.

• OSTI ID: 21537622
• Journal Information: Physics of Plasmas, Vol. 18, Issue 4; Other Information: DOI: 10.1063/1.3577568; (c) 2011 American Institute of Physics; ISSN 1070-664X
• Country of Publication: United States
• Language: English

Related Subjects

70 PLASMA PHYSICS AND FUSION TECHNOLOGY
ALFVEN WAVES
MAGNETOHYDRODYNAMICS
PLASMA
TOKAMAK DEVICES
CLOSED PLASMA DEVICES
FLUID MECHANICS
HYDRODYNAMICS
HYDROMAGNETIC WAVES
MECHANICS
THERMONUCLEAR DEVICES