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Effects Of Eigenmodes Of Alfv?�n Waves

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Eigenmodes of Alfvén waves can be excited by energetic particles (EPs) generated from neutral beam injection or other heating processes in tokamaks, (-- removed HTML --) (-- removed HTML --) 1–4 (-- removed HTML --) (-- removed HTML --) as well as fusion produced alpha particles. In burning plasma devices (-- removed HTML --) (-- removed HTML --) 5 (-- removed HTML --) (-- removed HTML --) like ITER, (-- removed HTML --) (-- removed HTML --) 6 (-- removed HTML --) (-- removed HTML --) the drive of EPs will become very strong because the velocity of alpha particle is close to be Alfvénic. In regions without strong continuum damping, (-- removed HTML --) (-- removed HTML --) 7,8 (-- removed HTML --) (-- removed HTML --) Toroidal…show more content…
Cheng and Chance (-- removed HTML --) (-- removed HTML --) 15 (-- removed HTML --) (-- removed HTML --) solve the linear ideal MHD equations to study the low- (-- removed HTML --) n (-- removed HTML --) shear Alfvén spectra in axisymmetric plasmas and find that toroidicity can break up the continuous spectra and form a continuum gap, within which an AE can be excited. Fu and Dam (-- removed HTML --) (-- removed HTML --) 11 (-- removed HTML --) (-- removed HTML --) consider the kinetic effects of the alpha particle and the electron on TAEs in circular flux surface tokamak using the linear drift kinetic equation coupled with the ideal MHD equations. They find that the low- (-- removed HTML --) n (-- removed HTML --) TAEs can be destabilized by alpha particles. Rosenbluth and Rutherford (-- removed HTML --) (-- removed HTML --) 1 (-- removed HTML --) (-- removed HTML --) point out that the shear Alfvén wave can be destabilized by the energetic ion and develop asymptotic formulas (-- removed HTML --) (-- removed HTML --) 8 (-- removed HTML --) (-- removed HTML --) to calculate the continuum damping rate for high- (-- removed HTML --) n (-- removed HTML --) TAE in a low-beta, large-aspect-ratio, circular tokamak. Chen (-- removed HTML --) (-- removed HTML --) 10 (-- removed HTML --) (-- removed HTML --) studied the high- (-- removed HTML --) n (-- removed HTML --) TAE and KBM (Kinetic Ballooning
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