2018
DOI: 10.1016/j.apsusc.2018.06.217
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Excimer laser ablation of graphite: The enhancement of carbon dimer formation

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Cited by 19 publications
(11 citation statements)
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“…The V-like shape becomes observable at LP = 44 cm, while for LP = 46 cm, the two plasma "seeds" appear to be completely separated. In previous works [20,21], we observed some correlations with the ablation crater depth profile. Thus, for LP = 41 cm and LP = 42, its shape is mirroring the laser energy distribution, but for LP = 46 cm, two ablation depths were observed, with a deeper hole in the crater center and two lateral thresholds at distances similar with the long axis of the laser beam [20,21].…”
Section: Complexitysupporting
confidence: 61%
See 1 more Smart Citation
“…The V-like shape becomes observable at LP = 44 cm, while for LP = 46 cm, the two plasma "seeds" appear to be completely separated. In previous works [20,21], we observed some correlations with the ablation crater depth profile. Thus, for LP = 41 cm and LP = 42, its shape is mirroring the laser energy distribution, but for LP = 46 cm, two ablation depths were observed, with a deeper hole in the crater center and two lateral thresholds at distances similar with the long axis of the laser beam [20,21].…”
Section: Complexitysupporting
confidence: 61%
“…The experimental setup used for measurements is described in details in [19][20][21]. Briefly, carbon plasma has been produced by the ablation of high-purity (99.99%) pyrolytic graphite targets placed in an evacuated chamber (0.0001 Pa) using a KrF excimer laser (248 nm, 20 ns, and 5 Hz).…”
Section: Experimental Aspectsmentioning
confidence: 99%
“…The basic technology of cryogenic buffer gas cooling has been developed and refined over the past two decades [61,63]. Hot carbon vapor to seed the buffer gas cell can be created via ablation of a graphite target [64,65] or evaporation of graphite rods via resistive heating [66]. These have been shown to generate vapor containing mixtures of various carbon compounds, including C, C 2 , C n , fullerenes, etc., whose exact ratios can be controlled by varying experimental parameters.…”
mentioning
confidence: 99%
“…These have been shown to generate vapor containing mixtures of various carbon compounds, including C, C 2 , C n , fullerenes, etc., whose exact ratios can be controlled by varying experimental parameters. For example, ablation sources can produce carbon beams with a typical composition of ∼ 10% of C 2 [64] and it has been shown that beam shaping of the ablation pulse can further enhance the formation of C 2 [65]. In the ablation process a significant C 2 fraction is found to be produced in the triplet states of a 3 Π u [65,67].…”
mentioning
confidence: 99%
“…Complex space charge structures such as fireballs, multiple double layers, plasma bubbles, and solitons offer exciting study grounds for both experimentalists and theoreticians. C. Ursu et al in "Fractal Method for Modeling the Peculiar Dynamics of Transient Carbon Plasma Generated by Excimer Laser Ablation in Vacuum" propose a fractal approach to simulate the formation of (surprising) V-shape radiating plasma structures (consisting of two lateral arms of high optical emissivity and a fast expanding central part of low emissivity), which have been previously observed [12]. In their model, the complexity of the interactions between the transient plasma particles (in the Euclidean space) is substituted by the nondifferentiability (fractality) of the motion curves to the same particles, but in a fractal space.…”
mentioning
confidence: 99%