
227Penetration and Screening
polarization axis. Therefore, in the presence of plasma conned in the mini-
mum B
o
eld, the vacuum wave mode is modied by the inhomogeneous
and anisotropic dielectric permittivity K. The wave polarization is predomi-
nantly TE
11
and undergoes rotation.
The peaks observed in the wave eld intensity and electron temperature
prole may be attributed to an upper hybrid-like resonance mechanism.
Since the plasma is bounded, the plane wave expression for the UHR con-
dition, namely,
pc
is modied by equating the denominator of
Equation 13.5a or Equation 13.5b to zero
ab
ab
q
q
pcrc co c
oc pcrc
kk UU
kk UU
22 2
2
22