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Measurement of Stark parameters of HeⅡ P-Alpha, P-Beta And P-Gamma spectral lines

机译:HeⅡP-Alpha,P-Beta和P-Gamma谱线的Stark参数的测量

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Optical diagnostics is a known and powerful tool to obtain information concerning the processes involved inside and around plasma. In the case of helium plasmas, they are present in industrial applications, like welding or cutting processes and in scientific research, like the inertial confinement plasmas or astrophysical analysis. This work reports information on the pressure broadened profiles of the HeⅡ Paschen-alpha (Pα), Paschen-beta (Pβ) and Paschen-gamma (Pγ) spectral lines measured in a pulsed discharge lamp. Information relative to the line shapes, full width at 1/2, 1/4 and 1/8 of the maximum intensity and the dip of the HeⅡ 320.3 nm is provided. The electron density has been determined by two-wavelength interferometry and from the Stark width of the HeⅠ 501.6 nm. and ranges during the HeⅡ emission from 0.54 to 0.64 10~(23) m~(-3) in the plasma. Temperature (1.7-2.4 eV) has been simultaneously determined from the Boltzmann-plot of HeI and from local thermodynamic equilibrium (LTE) assumptions. The final results have been compared with most of the previous existing data.
机译:光学诊断是获得有关等离子体内部和周围过程的信息的已知且功能强大的工具。就氦等离子体而言,它们存在于诸如焊接或切割工艺之类的工业应用中以及诸如惯性约束等离子体或天体物理学分析之类的科学研究中。这项工作报告了有关在脉冲放电灯中测得的HeⅡPaschen-alpha(Pα),Paschen-beta(Pβ)和Paschen-γ(Pγ)谱线的压力展宽曲线的信息。提供了有关线形,最大强度的1 / 2、1 / 4和1/8处的全宽以及HeⅡ320.3 nm的倾角的信息。电子密度是通过两波长干涉法和HeⅠ501.6 nm的Stark宽度确定的。等离子体中HeⅡ的发射范围为0.54〜0.64 10〜(23)m〜(-3)。温度(1.7-2.4 eV)已同时根据HeI的Boltzmann图和局部热力学平衡(LTE)假设确定。最终结果已与大多数以前的现有数据进行了比较。

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