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  Alfven eigenmodes and their destabilization by energetic circulating ions in Wendelstein-line stellarators

Kolesnichenko, Y. I., Lutsenko, V. V., Wobig, H., & Yakovenko, Y. V. (2002). Alfven eigenmodes and their destabilization by energetic circulating ions in Wendelstein-line stellarators. Nuclear Fusion, 42(8), 949-958.

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Item Permalink: https://hdl.handle.net/11858/00-001M-0000-0027-40B6-1 Version Permalink: https://hdl.handle.net/11858/00-001M-0000-0027-40B7-0
Genre: Journal Article

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 Creators:
Kolesnichenko, Y. I.1, Author
Lutsenko, V. V.1, Author
Wobig, H.2, 3, Author           
Yakovenko, Y. V.1, Author
Affiliations:
1Inst Nucl Res, Prospekt Nauky 47, UA-03680 Kiev, Ukraine, ou_persistent22              
2Stellarator Theory (ST), Max Planck Institute for Plasma Physics, Max Planck Society, ou_1856287              
3Experimental Plasma Physics 3 (E3), Max Planck Institute for Plasma Physics, Max Planck Society, ou_1856291              

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 Abstract: Instabilities of the Alfven eigenmodes (AEs) that can be driven by circulating energetic ions in optimized stellarators of the Wendelstein line (Helias configurations) are considered. It is stressed that the Alfven instabilities in stellarators may considerably differ from those in tokamaks because specific Alfven eigenmodes and specific resonances of the wave-particle interaction appear when magnetic configurations are non- axisymmetric. An important role of the continuum damping in low-shear stellarators is revealed. Aimed to calculate the continuum damping, a set of resistive magnetohydrodynamic (MHD) equations, which generalize the ideal MHD AE equations obtained in Kolesnichenko et al (Kolesnichenko Ya.I. et al 2001 Phys. Plasmas 8 491), is derived. The derived equations are solved numerically to investigate the damping of the AEs of global character in a Helias reactor.

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Language(s): eng - English
 Dates: 2002-08
 Publication Status: Issued
 Pages: -
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 Table of Contents: -
 Rev. Type: Peer
 Identifiers: eDoc: 20699
ISI: 000177867300002
 Degree: -

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Title: Nuclear Fusion
  Alternative Title : Nucl. Fusion
Source Genre: Journal
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Pages: - Volume / Issue: 42 (8) Sequence Number: - Start / End Page: 949 - 958 Identifier: ISSN: 0029-5515