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The results of theoretical analysis of the oscillation spectrum of a thin
plasma layer placed in a very strong quantizing magnetic field are presented.
It is shown that in ultra-quantum limit and when waves velocity is much
larger than ions and electrons thermal velocity, quantum effects appear
only if $Z\neq 1$, where $Z=|\frac{e_i}{e}|$ is the ion-electron charge ratio.
In the two-component plasma with $Z\neq 1$ surface quantum waves are unstable,
whereas in the one component plasma they are damping. At the same time in
the classical limit of magneto-confined plasma, surface waves excitation
takes place and their frequency spectrum is placed on the microwave
frequency range and therefore can be used for measuring the strength of a
very strong magnetic fields.
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