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首页> 外文期刊>Quantum electronics >Emission spectroscopy of a carbon plasma formed by laser ablation of graphite. II. Ablation by a CO_2 laser and also simultaneously by XeCl and CO_2 lasers
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Emission spectroscopy of a carbon plasma formed by laser ablation of graphite. II. Ablation by a CO_2 laser and also simultaneously by XeCl and CO_2 lasers

机译：通过激光烧蚀石墨形成的碳等离子体的发射光谱。二。用CO_2激光烧蚀，也可以同时用XeCl和CO_2激光烧蚀

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摘要

The method of time-resolved emission spectroscopy was used to investigate the radiation emitted by a carbon plasma plum formed as a result of vacuum ablation of graphite by pulsed CO_2 laser radiation. The spectrum of the radiation changed drastically in the course of emission from the plasma. The spectrum revealed successive appearance of various luminescence components contributed by C~+ ions, C_2 radicals, and microparticles. This spectrum differed considerably from that observed for a plasma formed by ablation with an XeCl laser, mainly because of the difference between the laser radiation wavelengths. Under certain conditions it was found that additional heating, with CO_2 laser radiation, of a plasma formed by ablation of graphite with XeCl laser radiation altered greatly the emission spectrum. The changes indicated a higher degree of particle atomisation and a higher proportion of ions in such a plasma, compared with the plasma produced by one laser.
机译：使用时间分辨发射光谱法研究了通过脉冲CO_2激光辐射对石墨进行真空烧蚀而形成的碳等离子体李子所发射的辐射。在从等离子体发射的过程中，辐射的光谱急剧变化。光谱揭示了由C〜+离子，C_2自由基和微粒贡献的各种发光成分的连续出现。该光谱与通过XeCl激光烧蚀形成的等离子体所观察到的光谱有很大不同，这主要是由于激光辐射波长之间的差异。在某些条件下，发现通过用XeCl激光辐射烧蚀石墨形成的等离子体，用CO_2激光辐射进行额外加热，极大地改变了发射光谱。与由一个激光器产生的等离子体相比，这种变化表明在这种等离子体中更高的粒子雾化程度和更高比例的离子。

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