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Title: Multidiagnostics analysis of ion dynamics in ultrafast laser ablation of metals over a large fluence range

Journal Article · · Journal of Applied Physics, 117(8):Article No. 083108
DOI:https://doi.org/10.1063/1.4913505· OSTI ID:1184279

The ions dynamics in ultrafast laser ablation of metals is studied over a fluence range spanning from the ablation threshold up to ~75 J/cm2 by means of three established diagnostic techniques. Langmuir probe, Faraday cup and spectrally resolved ICCD imaging simultaneously monitor the laser-produced plasma ions produced during ultrafast laser ablation of a copper target. The fluence dependence of ion yield is analyzed observing the occurrence of three different regimes. Moreover, the specific ion yield shows a maximum at about 4-5 J/cm2, followed by a gradual reduction and a transition to a high-fluence regime above ~50 J/cm2. The fluence variation of the copper ions angular distribution is also analyzed, observing a gradual increase of forward peaking of Cu ions for fluences up to ~10 J/cm2. Then, a broader ion component is observed at larger angles for fluences larger than ~10 J/cm2. Finally, an experimental characterization of the ions angular distribution for several metallic targets (Mg, Al, Cr, Fe, Cu, and W) is carried out at a relatively high fluence of ~66 J/cm2. Interestingly, the ion emission from the volatile metals show a narrow forward peaked distribution and a high peak ion yield compared to the refractory metals. Moreover, the width of ion angular distributions presents a striking correlation with the peak ion yield.

Research Organization:
Pacific Northwest National Lab. (PNNL), Richland, WA (United States)
Sponsoring Organization:
USDOE
Grant/Contract Number:
AC05-76RL01830
OSTI ID:
1184279
Report Number(s):
PNNL-SA-106874; NN2001000
Journal Information:
Journal of Applied Physics, 117(8):Article No. 083108, Journal Name: Journal of Applied Physics, 117(8):Article No. 083108
Country of Publication:
United States
Language:
English
Citation Metrics:
Cited by: 38 works
Citation information provided by
Web of Science

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Cited By (3)

Particle distribution in transient plasmas generated by ns-laser ablation on ternary metallic alloys journal September 2019
Investigation of femtosecond laser-produced plasma from various metallic targets using the Langmuir probe characteristic journal October 2017
Molecular formation in the stagnation region of colliding laser-produced plasmas journal October 2016

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