a1 Physical Research Laboratory, Ahmedabad, 380009, India
a2 Theoretische Physik I, Ruhr-Universität Bochum, D-4630 Bochum, Federal Republic of Germany
It is shown that drift dissipative instabilities can occur in the frequency regime Ωi ω Ωe. These instabilities are associated with the electron-acoustic and lower-hybrid waves.
(Received June 13 1982)