Prompt electron emission characterization in UV laser ablation of metallic targets

Salvatore Amoruso; Mario Armenante; Riccardo Bruzzese; Raffaele Velotta; Nicola Spinelli; X. Wang

doi:10.1117/12.378163

25 February 2000 Prompt electron emission characterization in UV laser ablation of metallic targets

Salvatore Amoruso, Mario Armenante, Riccardo Bruzzese, Raffaele Velotta, Nicola Spinelli, X. Wang

Proceedings Volume 4070, ALT '99 International Conference on Advanced Laser Technologies; (2000) https://doi.org/10.1117/12.378163
Event: ALT'99 International Conference: Advanced Laser Technologies, 1999, Potenza-Lecce, Italy

Abstract

We report on prompt emission of fast electrons occurring during nanosecond excimer laser ablation of metallic targets in vacuum. Prompt electrons yield and most probable kinetic energy as a function of the laser pulse fluence have been obtained by charge collection and time of flight techniques. The experimental data show a strong dependence of the prompt electrons yield on laser fluence. In particular, the data follow a power law dependence with two distinct slopes, below and above approximately equals 5 Jcm^-2. Also the ion yield shows a similar behavior. The observed roll-off in the electron and ion dependence on the laser fluence has been discussed in terms of laser fluence has been discussed in terms of laser plasma shielding effects.

Citation Download Citation

Salvatore Amoruso, Mario Armenante, Riccardo Bruzzese, Raffaele Velotta, Nicola Spinelli, and X. Wang "Prompt electron emission characterization in UV laser ablation of metallic targets", Proc. SPIE 4070, ALT '99 International Conference on Advanced Laser Technologies, (25 February 2000); https://doi.org/10.1117/12.378163

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