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Abstract
-A linear analysis of the current - convective in-
stability excited in inhomogeneous magnetized plasma
studied for two different t emper-atur-e ranges :
( i ) hot ion plasma ( T» le ) and
(ii) hot electron plasma ( 7;» T ).
(.
A dispersion equation describing each case is
derived and solved analytically to obtain the threshold
values, frequencies, growth rates and conditions of exci-
tation of the instability.
when
We considered kinetic treatment of the problems
much less than the electron
current velocity 11. is
”
thermal velocity
•
A comparison between the two cases (i) and (ii)
with that for isothermal plasma is considered.
The threshold current velocity of the instability
in case of hot electron plasma found to be less than
for isothermal and hot ion plasma. Besides, large dens-
ity gradient leads to decreasing the growth rate. It is
found also that gradual increasing of the ion temperature
with respect to electron temperature will reduce the
growth rate and hence stabilize the instability in the
linear stage.
.