Simultaneous Ion Heating ofHe+andAr+in Linear Turbulent-Heating Experiments

Abstract
Turbulent-heating experiments have been carried out in a linear machine with a driving gas of helium mixed with 7% argon in order to see the mass dependence of ion heating. Observation of optical line broadening of the ions showed that both kinds of ions were heated almost simultaneously by almost the same amount during the process. Several mechanisms for ion heating are examined on the basis of the experimental results obtained.