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激光诱导铝等离子体中原子和离子组分膨胀特性

林芷伊 简俊涛 王小华 杭纬

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激光诱导铝等离子体中原子和离子组分膨胀特性

林芷伊, 简俊涛, 王小华, 杭纬

Expansion characteristics of atom and ion component in laser-induced aluminum plasma

Lin Zhi-Yi, Jian Jun-Tao, Wang Xiao-Hua, Hang Wei
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  • 为了了解等离子体中原子与离子组分的膨胀特性及背景气体存在状态下其运动状态的改变规律,设计了一系列实验,并进行了深入探究.采用波长为532 nm的纳秒激光剥蚀铝样品形成等离子体,并使用配有emICCD检测器的C-T型三光栅单色仪对等离子体进行时序采集,同时使用2400 gmm-1的光栅替代窄带滤光片进行不同组分成像诊断,得到铝等离子体中Al I(396.1 nm),Al Ⅱ(466.3 nm),Al Ⅲ(447.9 nm)的光谱分辨图像.在不同背景气压下采集了等离子体各组分光谱图像,探究背景气体对等离子体演化的影响.结果表明,在等离子体形成过程中,离子组分相对于原子组分分布在羽流前端,且角度分布较小.原子与离子组分的真空膨胀速度均处于104 ms-1量级.等离子体中离子组分的运动速度较高,且其运动速度随着离子价态的增加而增大,但在本实验使用的能量密度范围下,随激光能量的变化波动不大.中性原子的运动速度较慢,但随能量的增加而增大.随着膨胀过程的进行,各组分羽流沿样品表面法线方向推进且发射强度逐渐降低,对应的羽流密度和温度也相应降低.环境气压逐渐增大时,各研究组分运动状态与在高真空度下时有明显区别.在气压大于1 Pa后,等离子体与环境气体发生相互渗透,膨胀前端出现的晕影,产生扰动,发生束缚缓速.且等离子羽因气压增大而收缩、与背景气体的碰撞概率增加,使得羽流发射强度加强,等离子体的寿命随之延长.提出的新颖诊断方法与实验所得结果可为等离子体组分动力学过程的研究提供参考.
    A series of experiments is designed in order to investigate the expansion and movement characteristics of atoms and ions of the plasma in the presence of ambient gas. To obtain two-dimensional spectral images of different components in the plasma, a nanosecond laser with a wavelength of 532 nm is used to ablate an aluminum sample, forming the plasma. A C-T type of tri-grating monochromator with an emICCD detector is used for diagnosing the plasma chronologically. At the same time, a 2400 gmm-1 grating is used to replace the narrowband filter for imaging diagnosis of different components in vacuum. The spectrally resolved images of Al I (396.1 nm), Al Ⅱ (466.3 nm), and Al Ⅲ (447.9 nm) in aluminum plasma are obtained. Besides, the spectral images of plasma components under different ambient pressures are collected to explore the influence of background gas on plasma evolution. The results show that in the plasma formation process, the ion component is distributed in the anterior segment of the plume relative to the atom component, and its angular distribution is smaller. The vacuum expansion rates of atoms and ions are all on the order of 104 ms-1. The movement speed of the ion component in the plasma is higher than that of atom component, and its movement speed increases with the valence of the ion increasing. In the energy density range used in this experiment, the velocity varies slightly with the laser energy. For the neutral atom, the velocity increases obviously as the energy increases. With the expansion process progressing, each component of the plume advances along the direction normal to the sample surface, and the emission intensity gradually decreases, the corresponding plume density and its temperature also decrease. With the ambient pressure increasing, the movement characteristics of each component are obviously different from those under high vacuum. At a pressure higher than 1 Pa, the plasma and the ambient gas are infiltrated with each other, vignetting appears in the front of the plume, disturbance occurs, causing the expansion speed to decrease. In addition, the plasma plume shrinks due to the increase of pressure, and the probability of collision with the background gas increases, so that the plume emission intensity is strengthened and the plasma lifetime is prolonged. The results of the new diagnosis method and the experimental results demonstrated in this study can provide a reference for the study of plasma component dynamic process.
      通信作者: 杭纬, weihang@xmu.edu.cn
    • 基金项目: 国家自然科学基金(基金号:21427813)资助的课题.
      Corresponding author: Hang Wei, weihang@xmu.edu.cn
    • Funds: Project supported by the National Natural Science Foundation of China (Grant No. 21427813).
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    Freeman J R, Harilal S S, Diwakar P K, Verhoff B, Hassanein A 2013 Spectrochim. Acta B 87 43

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    Li X Y, Lin Z X, Liu Y Y, Chen Y Q, Gong S S 2004 Acta Opt. Sin. 24 1051 (in Chinese) [李小银, 林兆祥, 刘煜炎, 陈扬锓, 龚顺生 2004 光学学报 24 1051]

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    Guo K M, Gao X, Hao Z Q, Lu Y, Sun C K, Lin J Q 2012 Acta Phys. Sin. 61 075212 (in Chinese) [郭凯敏, 高勋, 郝作强, 鲁毅, 孙长凯, 林景全 2012 物理学报 61 075212]

    [17]

    Miyabe M, Oba M, Limura H, Akaoka K, Khumarni A, Kato M, Wakaida I 2015 Spectrochim. Acta B 110 101

    [18]

    Bai X S, Ma Q L, Perrier M, Motto-Ros V, Sabourdy D, Nguyen L, Jalocha A, Yu J 2013 Spectrochim. Acta B 87 27

    [19]

    NIST Atomic Spectra Database Lines Form https://physics.nist.gov/PhysRefData/ASD/lines_form.html [2018-4-2]

    [20]

    Bulgakova N M, Bulgakov A V, Bobrenok O F 2000 Phys. Rev. E 62 5624

    [21]

    Wang X, Zhang S, Cheng X, Zhu E, Hang W, Huang B 2014 Spectrochim. Acta B 99 101

    [22]

    Torrisi L, Caridi F, Margarone D, Borrielli A 2008 Appl. Surf. Sci. 254 2090

    [23]

    Tang X S, Li C Y, Zhu G L, Ji X H, Feng E Y, Zhang W J, Cui Z F 2004 Chin. J. Laser 31 687 (in Chinese) [唐晓闩, 李春燕, 朱光来, 季学韩, 凤尔银, 张为俊, 崔执凤 2004 中国激光 31 687]

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    Chen X, Bian B M, Shen Z H, Lu J, Ni X W 2003 Micro. Opt. Techn. Lett. 38 75

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    Sharma A K, Thareja R K 2005 Appl. Surf. Sci. 243 68

  • [1]

    Emara E M, Imam H, Hassan M A, Elnaby S H 2013 Talanta 117 176

    [2]

    Pedarnig J D, Kolmhofer P, Huber N, Praher B, Heitz J, Rssler R 2013 Appl. Phys. A: Mater. 112 105

    [3]

    Srungaram P K, Ayyalasomayajula K K, Fang Y Y, Singh J P 2013 Spectrochim. Acta B 87 108

    [4]

    Wu J, Wei W, Yang Z, Li X 2014 IEEE Trans. Plasma Sci. 42 2586

    [5]

    Harilal S, Bindhu C, Tillack M, Najmabadi F, Gaeris A 2003 J. Appl. Phys. 93 2380

    [6]

    Sankar P, Nivas J J J, Smijesh N, Tiwari G K, Philip R 2017 J. Anal. Atom. Spectrom. 32 1177

    [7]

    Hahn D W, Omenetto N 2010 Appl. Spectrosc. 64 335

    [8]

    Ma, Q L, Motto-Ros V, Lei W Q, Boueri M, Bai X S, Zheng L J, Zeng H P, Yu J 2010 Spectrochim. Acta B 65 896

    [9]

    Bogaerts A, Chen Z, Bleiner D 2006 J. Anal. Atom. Spectrom. 21 384

    [10]

    Bogaerts A, Chen Z 2004 J. Anal. Atom. Spectrom. 19 1169

    [11]

    Chen Z, Bleiner D, Bogaerts A 2006 J. Appl. Phys. 99 063304

    [12]

    Zheng P C, Liu H D, Wang J M, Yu B, Yang R, Zhang B, Wang X M 2014 Chin. J. Laser 41 1015001 (in Chinese) [郑培超, 刘红弟, 王金梅, 于斌, 杨蕊, 张斌, 王晓蒙 2014 中国激光 41 1015001]

    [13]

    Wang X L, Zhang N, Zhao Y B, Li Z L, Zhai H C, Zhu X N 2008 Acta Phys. Sin. 57 354 (in Chinese) [王晓雷, 张楠, 赵友博, 李智磊, 翟宏琛, 朱晓农 2008 物理学报 57 354]

    [14]

    Freeman J R, Harilal S S, Diwakar P K, Verhoff B, Hassanein A 2013 Spectrochim. Acta B 87 43

    [15]

    Li X Y, Lin Z X, Liu Y Y, Chen Y Q, Gong S S 2004 Acta Opt. Sin. 24 1051 (in Chinese) [李小银, 林兆祥, 刘煜炎, 陈扬锓, 龚顺生 2004 光学学报 24 1051]

    [16]

    Guo K M, Gao X, Hao Z Q, Lu Y, Sun C K, Lin J Q 2012 Acta Phys. Sin. 61 075212 (in Chinese) [郭凯敏, 高勋, 郝作强, 鲁毅, 孙长凯, 林景全 2012 物理学报 61 075212]

    [17]

    Miyabe M, Oba M, Limura H, Akaoka K, Khumarni A, Kato M, Wakaida I 2015 Spectrochim. Acta B 110 101

    [18]

    Bai X S, Ma Q L, Perrier M, Motto-Ros V, Sabourdy D, Nguyen L, Jalocha A, Yu J 2013 Spectrochim. Acta B 87 27

    [19]

    NIST Atomic Spectra Database Lines Form https://physics.nist.gov/PhysRefData/ASD/lines_form.html [2018-4-2]

    [20]

    Bulgakova N M, Bulgakov A V, Bobrenok O F 2000 Phys. Rev. E 62 5624

    [21]

    Wang X, Zhang S, Cheng X, Zhu E, Hang W, Huang B 2014 Spectrochim. Acta B 99 101

    [22]

    Torrisi L, Caridi F, Margarone D, Borrielli A 2008 Appl. Surf. Sci. 254 2090

    [23]

    Tang X S, Li C Y, Zhu G L, Ji X H, Feng E Y, Zhang W J, Cui Z F 2004 Chin. J. Laser 31 687 (in Chinese) [唐晓闩, 李春燕, 朱光来, 季学韩, 凤尔银, 张为俊, 崔执凤 2004 中国激光 31 687]

    [24]

    Chen X, Bian B M, Shen Z H, Lu J, Ni X W 2003 Micro. Opt. Techn. Lett. 38 75

    [25]

    Sharma A K, Thareja R K 2005 Appl. Surf. Sci. 243 68

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出版历程
  • 收稿日期:  2018-04-03
  • 修回日期:  2018-05-23
  • 刊出日期:  2019-09-20

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