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The results of examination of the GaAs-target erosion under irradiation by a high-power pulsed ion beam are reported. In the experiments, use was made of a high-power pulsed ion source with the following parameters: ion energy — 250 keV, target current density — 350 A/cm2, pulse duration — 80 ns, target energy density — up to 7 J/cm2. The target erosion coefficient and its dependence on the number...