Laser produced plasmas in high fluence ablation of metallic surfaces probed by time-of-flight mass spectrometry

Abstract We report on TOF mass spectrometric analysis of plasmas produced by laser ablation on Al targets. We obtained mass spectra of ionized species in the UV ({ce:inline-formula}λ = 355nm{/ce:inline-formula}) and in the visible ({ce:inline-formula}λ = 532nm{/ce:inline-formula}) and at high laser fluences (1–80 J cm−2). The total ion yield, the relative abundance of different charged species and the laser fluence threshold for the appearance of specific ions as a function of energy density were measured.

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