Probe measurements of XeCl excimer laser ablated Al, Cu, Nb, and Ta solid samples

Oleg Alexeyevic Novodvorsky; Olga D. Khramova; Elena O. Filippova; Alexsandr K. Shevelev

doi:10.1117/12.376998

1 February 2000 Probe measurements of XeCl excimer laser ablated Al, Cu, Nb, and Ta solid samples

Oleg Alexeyevic Novodvorsky, Olga D. Khramova, Elena O. Filippova, Alexsandr K. Shevelev

Proceedings Volume 3885, High-Power Laser Ablation II; (2000) https://doi.org/10.1117/12.376998
Event: Advanced High-Power Lasers and Applications, 1999, Osaka, Japan

Abstract

The ablation of metallic targets from Al, Cu, Nb, Ta has been studied under irradiation with 308 nm excimer XeCl laser. A single-wire electron Langmuir probe has been used in time-of-flight measurements of velocity of plume ions scatter. An investigation has been pursued of the dependence of ion current shape at the probe both on laser radiation flux in the range from 0.2 to 2 J/cm² and on the probe- to-target interval 23 to 113 nm. The velocities of ions scatter and their energy spectrum have been found with regard for the time of charge reaching the probe. The dynamics of energy spectrum of the plume ions has been studied. Multimode distributions of ions by scatter velocities have been revealed. The dependence of amplitudes of plume energy components on plume scatter time and on radiation flux has been investigated. The experimental time- of-flight data have been compared with Maxwell distribution by velocities, and a good agreement has been obtained. The threshold values of laser radiation flux have been determined for different modes of ion energy spectrum. Measurements have been taken of ion energy spectrum dependence upon scatter angle in the planes of orthogonal cross-sections of radiation focused spot on the target.

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Oleg Alexeyevic Novodvorsky, Olga D. Khramova, Elena O. Filippova, and Alexsandr K. Shevelev "Probe measurements of XeCl excimer laser ablated Al, Cu, Nb, and Ta solid samples", Proc. SPIE 3885, High-Power Laser Ablation II, (1 February 2000); https://doi.org/10.1117/12.376998

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