Ve. Moiseenko et E. Tennfors, LOCALIZED GLOBAL ICRF EIGENMODES AND CONVERSION ZONES IN A 2-ION SPECIES TOKAMAK, Plasma physics and controlled fusion, 38(12), 1996, pp. 2133-2142
The location of the slow-fast wave conversion zones is analysed for a
tokamak in ICRF. The obtained dispersion relation which determines the
surfaces of wave conversion describes the cases of weak and strong mo
de coupling as well as the intermediate one. Using the same approach,
the localized global eigenmodes are studied. With respect to their nat
ure, they are separated into two types. The first is the TLE-TAE-like
eigenmode. Like the TAE it is the result of mode coupling. The second
one is the single-mode eigenmodes. This type is represented by two eig
enmodes. One is the extension of the GAE (global Alfven eigenmode) to
the two-ion species plasma The other one is OHE (original hybrid eigen
mode) which exists in the case of strong mode coupling. The field stru
cture and dispersion of these waves are discussed.