Features in the ion emission of Cu, Al, and C plasmas produced by ultrafast laser ablation

Kelly, T. J.; Butler, T.; Walsh, N.; Hayden, P.; Costello, J. T.

Abstract

© 2015 AIP Publishing LLC. The bi-modal nature of charge integrated ion kinetic energy distributions, which result from ultrafast laser produced plasmas, is discussed in this paper. A negatively biased Faraday cup was used as a charge collector to measure ion distributions from three different solid targets that had been irradiated with an ultrafast laser in the fluence range 0.1-1 J/cm2. A bi-modal time of flight distribution is found for all three targets (C, Al, and Cu). In the case of the metallic targets (Al and Cu), high- and low-kinetic energy peaks exhibit quite different dependencies on laser fluence, whereas for the semi-metallic target (C), both peaks scale similarly with ultrafast laser fluence. The results are discussed within the framework of a one dimensional capacitor model resulting in ion acceleration.

Citation

Kelly, T. J., Butler, T., Walsh, N., Hayden, P., & Costello, J. T. (2015). Features in the ion emission of Cu, Al, and C plasmas produced by ultrafast laser ablation. Physics of Plasmas, 22(12), Article 123112. https://doi.org/10.1063/1.4937800

• Journal Article Type: Article
• Acceptance Date: Dec 1, 2015
• Online Publication Date: Dec 16, 2015
• Publication Date: 2015-12
• Deposit Date: Jul 18, 2016
• Publicly Available Date: Jul 18, 2016
• Journal: Physics of plasmas
• Print ISSN: 1070-664X
• Publisher: American Institute of Physics
• Peer Reviewed: Peer Reviewed
• Volume: 22
• Issue: 12
• Article Number: 123112
• DOI: https://doi.org/10.1063/1.4937800
• Keywords: Lasers
• Public URL: https://hull-repository.worktribe.com/output/441104
• Publisher URL: http://scitation.aip.org/content/aip/journal/pop/22/12/10.1063/1.4937800
• Additional Information: Copy of article first published in Physics of plasmas, 2015, v.22, issue 12.
• Contract Date: Jul 18, 2016