Abstract
A description of ion heating by ion-acoustic turbulence in a plasma containing two ion species of different charge-to-mass ratio is presented. It is shown that, when collisions between ions of different species are ignored, only one of the ion species is heated substantially while the temperature of the other species approaches a constant value that differs insignificantly from the initial ion temperature. The only exception to this is a case in which the plasma parameters are in a particular relationship. For an example of a fully ionized HO plasma, it is shown that taking into account the collisional energy exchange between different ion species removes this restriction on the ion temperature.
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