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Titolo:
Resonant interaction of fast particles with neoclassical tearing modes
Autore:
Marchenko, VS; Lutsenko, VV;
Indirizzi:
Inst Nucl Res, Ctr Sci, UA-03680 Kyiv, Ukraine Inst Nucl Res Kyiv Ukraine UA-03680 Res, Ctr Sci, UA-03680 Kyiv, Ukraine
Titolo Testata:
PHYSICS OF PLASMAS
fascicolo: 2, volume: 8, anno: 2001,
pagine: 510 - 515
SICI:
1070-664X(200102)8:2<510:RIOFPW>2.0.ZU;2-P
Fonte:
ISI
Lingua:
ENG
Soggetto:
MAGNETIC ISLANDS; TOKAMAK; THRESHOLD; DRIVEN;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Physical, Chemical & Earth Sciences
Citazioni:
22
Recensione:
Indirizzi per estratti:
Indirizzo: Marchenko, VS Inst Nucl Res, Ctr Sci, UA-03680 Kyiv, Ukraine Inst Nucl Res Kyiv Ukraine UA-03680 UA-03680 Kyiv, Ukraine
Citazione:
V.S. Marchenko e V.V. Lutsenko, "Resonant interaction of fast particles with neoclassical tearing modes", PHYS PLASMA, 8(2), 2001, pp. 510-515

Abstract

Cherenkov resonance between rotating neoclassical tearing mode (NTM) and energetic ions has been considered. Resonant interaction drives the current,which is in phase quadrature with the magnetic island and thus produces a toroidal torque accelerating island in the direction of the fast ion diamagnetic drift. This torque has been included in the coupled nonlinear first-order differential equations governing evolution of the NTM rotation frequency and amplitude. It has been shown that due to resonant interaction with energetic ions, this autonomous system exhibits Hopf bifurcation from the unstable stationary solution to the stable limit cycle describing nonlinear oscillations of the mode frequency and amplitude. Such behavior resembles the frequency jump events observed during NTM activity in ASDEX Upgrade [S. Guenter , Phys. Plasmas 7, 935 (2000)]. (C) 2001 American Institute of Physics.

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Documento generato il 04/07/20 alle ore 13:41:35