A technique to determine the number and current density of MeV protons in an intense beam was tested on the GAMBLE II generator. Diode current and voltage and an absolute measurement of K-line radiation emitted from a 6-μm-thick aluminum target were used to determine the number and current density of protons incident on the target. Time-dependent x-ray measurements can be used to infer variations in the ion-beam current density.
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Bleach et al. (1981) studied this question.
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