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氩等离子体真空紫外光辐射属性的计算

Calculation on Radiative Properties of Argon Plasmas in Vacuum Ultraviolet

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摘要

基于局部热力学平衡和等温球体假设, 考察了氩等离子体的连续谱辐射(复合辐射和轫致辐射)和线谱辐射, 计算了不同球体半径Rp条件下氩等离子体在0.1 MPa、5000~25000 K条件下的全谱、真空紫外光谱和非真空紫外光谱的净辐射系数;着重分析了真空紫外光在全谱中的占比以及各种辐射机制对真空紫外光的作用。结果表明:当Rp=0 mm时(不考虑自吸收), 真空紫外光在全谱中的占比大于94.8%, 线谱是其主要的辐射机制;当Rp增大至1 mm时, 真空紫外光强烈的自吸收使其占比有所减小, 但在高于17000 K时仍然大于80%, 同时连续谱在真空紫外光中的作用变得重要;所得计算结果与其他研究者的计算结果和实验结果均吻合良好。

Abstract

On the basis of the assumption of local thermodynamic equilibrium and isothermal spheres, the continuum emission (recombination radiation and bremsstrahlung) and line emission of argon plasmas are investigated. Net emission coefficients are calculated for the argon plasmas in the wavelength ranges of the entire, vacuum ultraviolet and non-vacuum ultraviolet spectra at 0.1 MPa and the temperature range from 5000 K to 25000 K with different sphere radii of Rp. Special attention is paid to analyze the contribution of the vacuum ultraviolet to the entire emission and the influence of various radiative mechanisms on vacuum ultraviolet. The results show that for Rp=0 mm (without self-absorption), the contribution of the vacuum ultraviolet is greater than 94.8%, with the line emission dominant in the radiation. For Rp=1 mm, the contribution decreases due to the strong absorption of the vacuum ultraviolet, accompanied by the improved influence of atomic continuum. Nevertheless, the contribution is still greater than 80% at temperature above 17000 K. Our calculation results are proved to be correct by comparing with the previous calculated and experimental results.

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中图分类号:O433.2

DOI:10.3788/aos201838.0326001

所属栏目:物理光学

基金项目:国家自然科学基金(51175374, 51475325, 51675375)、国家863计划(2014BAF12B05)

收稿日期:2017-10-10

修改稿日期:2017-10-25

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作者单位    点击查看

王飞:天津大学天津市现代连接技术重点实验室, 天津 300072LAPLACE实验室, Université de Toulouse, UPS, INPT, 118 route de Narbonne, F-31062 Toulouse Cedex 9, 法国
李桓:天津大学天津市现代连接技术重点实验室, 天津 300072
Cressault Yann:LAPLACE实验室, Université de Toulouse, UPS, INPT, 118 route de Narbonne, F-31062 Toulouse Cedex 9, 法国
Teulet Philippe:LAPLACE实验室, Université de Toulouse, UPS, INPT, 118 route de Narbonne, F-31062 Toulouse Cedex 9, 法国

联系人作者:王飞(wangfei2012@tju.edu.cn)

备注:王飞(1986-), 男, 博士研究生, 主要从事等离子体辐射属性计算、焊接电弧模拟等方面的研究。E-mail: wangfei2012@tju.edu.cn

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引用该论文

Wang Fei,Li Huan,Cressault Yann,Teulet Philippe. Calculation on Radiative Properties of Argon Plasmas in Vacuum Ultraviolet[J]. Acta Optica Sinica, 2018, 38(3): 0326001

王飞,李桓,Cressault Yann,Teulet Philippe. 氩等离子体真空紫外光辐射属性的计算[J]. 光学学报, 2018, 38(3): 0326001

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