Interchange and infernal fishbone modes in plasmas with tangentially injected beams
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چکیده
منابع مشابه
Interchange and Infernal Fishbone Modes in Plasmas with Tangentially Injected Beams
New energetic particle mode instabilities of fishbone type are predicted. The considered instabilities are driven by the circulating energetic ions. They can arise in plasmas of tokamaks and spherical tori with weak magnetic shear in the wide core region and strong shear at the periphery, provided that the central safety factor is close to the ratio m/n, where m and n are the poloidal mode numb...
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Gross plasma stability can derive from plasma compressibility in the bad curvature regions of closed field line systems. In this situation magnetohydrodynamic ~MHD! theory predicts that the maximum pressure gradient that is stable is proportional to g , the ratio of specific heats. This article will examine the accuracy of the MHD prediction for electrostatic interchange modes using kinetic the...
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چکیده ندارد.
Envelope Modes of Beams with Angular Momentum*
For a particle beam propagating in an alternating gradient focusing system, envelope equations are often employed to describe the evolution of the beam radii in the two directions transverse to the direction of propagation, and aligned with the principle axes of the alternating gradient system. When the beams have zero net angular momentum and when the alternating gradient focusing is approxima...
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The existence of a critical pressure gradient needed to drive the interchange instability is experimentally demonstrated in the simple magnetized torus TORoidal Plasma EXperiment A. Fasoli et al., Phys. Plasmas 13, 055902 2006 . This gradient is reached during a scan in the neutral gas pressure pn. Around a critical value for pn, depending on the magnetic configuration and on the injected rf po...
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ژورنال
عنوان ژورنال: Physics of Plasmas
سال: 2006
ISSN: 1070-664X,1089-7674
DOI: 10.1063/1.2198207