Hybrid simulations of fishbone instabilities and Alfvén eigenmodes in DIII-D tokamak
نویسندگان
چکیده
منابع مشابه
Radial structure of Alfvén eigenmodes in the DIII-D tokamak through electron-cyclotron-emission measurements.
The spatial structure of toroidal Alfvén eigenmodes and reversed shear Alfvén eigenmodes in DIII-D is obtained from electron-cyclotron-emission measurements. Peak measured temperature perturbations are of similar magnitude for both toroidal Alfvén eigenmodes and reversed shear Alfvén eigenmodes and found to be deltaT(e)/T(e) approximately equal to 0.5%. Simultaneous measurements of density fluc...
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Linear properties of the reverse shear Alfvén eigenmode (RSAE) in a well-diagnosed DIII-D tokamak experiment (discharge #142111) are studied in gyrokinetic particle simulations. Simulations find that a weakly damped RSAE exists due to toroidal coupling and other geometric effects. The mode is driven unstable by density gradients of fast ions from neutral beam injection. Various damping and driv...
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Neutral beam injection into reversed magnetic shear DIII-D plasmas produces a variety of Alfvénic activity including Toroidicity and Ellipticity induced Alfvén Eigenmodes (TAE/EAE, respectively) and Reversed Shear Alfvén Eigenmodes (RSAE) as well as their spatial coupling. These modes are typically studied during the discharge current ramp phase when incomplete current penetration results in a ...
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M. Murakami, M.R. Wade, J.C. DeBoo, C.M. Greenfield, T.C. Luce, M.A. Makowski, C.C. Petty, G.M. Staebler, T.S. Taylor, M.E. Austin, D.R. Baker, R.V. Budny, K.H. Burrell, T.A. Casper, M. Choi, J.R. Ferron, A.M. Garofalo, I.A. Gorelov, R.J. Groebner, R. La Haye, A.W. Hyatt, R.J. Jayakumar, K. Kajiwara, J.E. Kinsey, L.L. Lao, J. Lohr, D. McCune, R.I. Pinsker, P.A. Politzer, R. Prater, ( b ) H.E. S...
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ژورنال
عنوان ژورنال: Physics of Plasmas
سال: 2018
ISSN: 1070-664X,1089-7674
DOI: 10.1063/1.5064647