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Catapulting velocity as a function of laser spot size. (A) Initial velocity of the specimens; (B) initial velocity of the particulate debris; (C) average velocity of the specimens during the first 50-μs flight time, with regimes for plasma and hole formation. 40×, objective, NA = 0.6, E = 10 μJ. The center of the irradiated spot coincided with the center of the specimen.
