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Experiments have been conducted on an adiabatic toroidal compressor with tangential injection of two 14-15-keV, 3-4-A beams of H⁰ or D⁰. The ion-temperature rise for both H⁺ and D⁺ plasmas is 70-80 eV (i.e., 35-40%), consistent with theoretical expectations for charge-exchange-limited energy transport at neutral-atom densities {} 10⁹ cm^-3. The injected ions are found to decelerate in agreement with classical theory and produce an initial plasma ion heating rate of {~} 20 keV/sec.
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Bol et al. (1974) studied this question.
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