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Present high-current ion sources for neutral injection experiments accelerate a mixture of atomic and tnolecular hydrogen species that are converted into neutral particles with different energies and neutralization efficiencies.Beam composition can have important e.ffects on injection system efficiency, vacuum design, and first-wall loading.Beam composition measurements of the 20-keV LBL high-current sources are. used to calculate the relative power in the various beam components expected at higher energies.
Berkner et al. (1975) studied this question.