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首页> 外文期刊>Spectrochimica Acta, Part B. Atomic Spectroscopy >V-shape plasma generated by excimer laser ablation of graphite in argon: Spectroscopic investigations
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V-shape plasma generated by excimer laser ablation of graphite in argon: Spectroscopic investigations

机译：氩气中的准分子激光烧蚀产生的V形等离子体：光谱研究

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摘要

Continuing previous works on the dynamics of carbon plasmas generated by excimer laser ablation in vacuum, we report here a new study using Ar as background gas. The increased collision rate allows extended (both spatially and temporally) investigations of the low-emitting axial region of the unusual V-shape transient plasma evidenced in our previous works. The systematic study performed here by fast-gate intensified CCD photography and space- and time-resolved optical emission spectroscopy led to an extensive database, especially on the evolution of C, Ar and C-dimer (monitored through the Swan bands). The enhancement of the dimer formation (which has an important role in carbon plasma chemistry) in the lateral structures is confirmed and even amplified by the use of background gas. Furthermore, temperature and electron density values have been estimated from the spectroscopic data, providing additional proofs for the validity of the plasma dynamics scenario built for this unusual plume shape.
机译：继续以前的作品在真空中的准分子激光烧蚀产生的碳等离子体的动态，我们在此报告使用AR作为背景气体的新研究。提高的碰撞率允许延伸（空间上和时间上）对我们之前的作品中的不寻常的V形瞬态等离子体的低发射轴向区域的研究。通过Fast-Gate强化CCD摄影和空间和时间分辨的光发射光谱在此进行的系统研究导致了广泛的数据库，尤其是在C，AR和C-DIMER的演变（通过天鹅频带监测）。通过使用背景气体，确认并甚至扩增了在横向结构中的二聚体形成（在碳血浆化学中具有重要作用）的增强。此外，从光谱数据估计了温度和电子密度值，为该不寻常的羽流构造的等离子体动力学场景的有效性提供了额外的证据。

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