Abstract
One-dimensional propagation characteristics of the plasma disturbance which originates from the temperature disturbance at the inlet of a linear-type magnetohydrodynamic (MHD) channel were analysed numerically. It was shown that the temperature fluctuation propagates with two different speeds. One is the mean flow convection speed and the other is the acoustic plus convection speed. Both waves appeared at the same time when a single-pulse temperature disturbance was induced adiabatically at the channel upstream. By contrast, the velocity wave excited inside the channel always propagates with the latter speed.
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