Interchange and Infernal Fishbone Modes in Plasmas with Tangentially Injected Beams | Zendy

Kolesnichenko | Zendy; Ya.I. | Zendy; Marchenko | Zendy; S. Valai Ganesh | Zendy; White | Zendy; Rubén González B. | Zendy

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Interchange and Infernal Fishbone Modes in Plasmas with Tangentially Injected Beams

Author(s) -

Kolesnichenko,

Ya.I.,

Marchenko,

S. Valai Ganesh,

White,

Rubén González B.

Publication year - 2006

Publication title -

osti oai (u.s. department of energy office of scientific and technical information)

Language(s) - English

Resource type - Reports

DOI - 10.2172/934616

Subject(s) - toroid , physics , plasma , tokamak , magnetohydrodynamics , instability , torus , shear (geology) , atomic physics , safety factor , plasma instability , mode (computer interface) , ion , resonance (particle physics) , mechanics , computational physics , nuclear physics , geometry , materials science , quantum mechanics , mathematics , computer science , composite material , operating system

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 number and toroidal mode number, respectively. The instability with m = n = 1 has interchange-like spatial structure, whereas the structure of instabilities with m/n > 1 is similar to that of the infernal MHD mode (except for the region in vicinity of the local Alfvén resonance)

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