Radiative Transfer in Pulsed-Laser-lnduced Plasma

Author:

Xu X.1,Song K. H.1

Affiliation:

1. School of Mechanical Engineering, Purdue University, 1288 Mechanical Engineering Building, West Lafayette, IN 47907

Abstract

When a high-power pulsed laser interacts with materials, a plasma layer containing micrometer-size particles is formed above the target surface. The laser induced plasma changes the energy coupling mechanism between the laser beam and the target. This work investigates the radiative heat transfer process in the excimer laser generated plasma layer on the Ni specimen, in the laser fluence range between 1.5 and 5 J/cm2. Novel diagnostic techniques are developed to measure transient transmission and scattering of the thin plasma layer within the duration of the laser pulse. Based on the measurement results, radiative heat transfer analysis is performed to evaluate the radiative properties of the plasma layer, including the optical depth, the absorption coefficient, the single scattering phase function, and the scattering size parameters. Knowledge of the radiative properties of the laser induced plasma helps to understand the energy transfer process during laser-materials interaction. Further, this work demonstrates the feasibility of using the transient scattering measurement for in situ monitoring of the size of the laser ejected particles.

Publisher

ASME International

Subject

Mechanical Engineering,Mechanics of Materials,Condensed Matter Physics,General Materials Science

Reference16 articles.

1. Braren, B., Dubowski, J. J., and Norton, D. P., eds., 1993, “Laser Ablation in Materials Processing: Fundamentals and Applications,” Mat. Res. Soc. Symp. Proc, Vol. 285, MRS, New York.

2. Brewster, M. Q., 1992, Thermal Radiative Transfer & Properties, John Wiley & Sons, New York.

3. Bohren, C. F., and Huffman, D. R., 1983, Absorption and Scattering of Light by Small Particles, John Wiley and Sons, New York.

4. Callies G. , BergerP., Ka¨stleJ., and Hu¨gelH., 1995, “Excimer-Laser Induced Shock Waves in the Presence of External Gas Flows,” Proceedings of SPIE—The International Society for Optical Engineering, Vol. 2502, pp. 706–711.

5. Chandrasekhar, S., 1950, Radiative Transfer, Oxford University Press, Glasgow.

Cited by 17 articles. 订阅此论文施引文献 订阅此论文施引文献,注册后可以免费订阅5篇论文的施引文献,订阅后可以查看论文全部施引文献

同舟云学术

1.学者识别学者识别

2.学术分析学术分析

3.人才评估人才评估

"同舟云学术"是以全球学者为主线,采集、加工和组织学术论文而形成的新型学术文献查询和分析系统,可以对全球学者进行文献检索和人才价值评估。用户可以通过关注某些学科领域的顶尖人物而持续追踪该领域的学科进展和研究前沿。经过近期的数据扩容,当前同舟云学术共收录了国内外主流学术期刊6万余种,收集的期刊论文及会议论文总量共计约1.5亿篇,并以每天添加12000余篇中外论文的速度递增。我们也可以为用户提供个性化、定制化的学者数据。欢迎来电咨询!咨询电话:010-8811{复制后删除}0370

www.globalauthorid.com

TOP

Copyright © 2019-2024 北京同舟云网络信息技术有限公司
京公网安备11010802033243号  京ICP备18003416号-3