飞秒脉冲激光诱导钛等离子体在不同压力下的动力学

Journal of Atomic and Molecular Sciences Pub Date : 2015-06-01 DOI:10.4208/JAMS.090915.101215A

Dong Liu, C. S. Chen, Xun Gao, Jingquan Lin, B. Man, Mei Liu, Yanna Sun, Feifei Li

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引用次数: 0

摘要

系统地研究了过渡金属Ti在空气背景下的飞秒激光烧蚀过程和诱导击穿光谱。利用三维双温度模型(3D-TTM)对烧蚀过程进行了模拟。时间分辨光谱学用于测定等离子体在其演化过程中的特性。飞行时间光谱(TOFS)也被用来表征等离子体膨胀。分析了等离子体的演化行为及其光谱特征随压力的变化规律。结果表明，等离子体的组成、膨胀行为和特性具有很强的压力依赖性。从环境空气与等离子体相互作用机制的角度讨论了研究结果。pac: 32.30。Jc, 32.70.Jz

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Dynamics of femtosecond pulsed laser induced Ti plasmas under different pressures

The femtosecond laser ablation process and induced breakdown spectroscopy of transition metal Ti in air background has been investigated systematically. The ablation process is simulated by means of a three-dimensional two temperature model (3D-TTM). The time-resolved spectroscopy is employed to determine the characteristics of plasma during its evolution. The time-of-flight spectroscopy (TOFS) is also used to characterize the plasma expansion. The evolution behaviors of the plasma and its spectral characteristics have been analyzed as a function of pressure. It is shown that the component, expansion behavior and characteristics of the plasma have strong pressure dependences. The results are discussed in terms of the interaction mechanisms between ambient air and plasma species. PACS: 32.30.Jc, 32.70.Jz

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Journal of Atomic and Molecular Sciences PHYSICS, ATOMIC, MOLECULAR & CHEMICAL-

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