Effect of magnetic confinement technique on plasma radiation characteristics

Jinzhong, 陈金忠 Chen; Jinning, 白津宁 Bai; Jing, 王敬 Wang; Jiang, 孙江 Sun; Shuqing, 郭树青 Guo

doi:10.3788/hplpb20142601.12002

Cited by 1 publication

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“…The advantage of this method compared with the absorption spectrometry is that it can be applied to some extent the qualitative and quantitative analysis of the insoluble or refractory material (Such as: soil, ceramics, minerals, etc), and simultaneous measurement of multi-element. The study of the characteristics of laser induced plasma is the basis for the spectral analysis and it is an important foundation work in spectral analysis that reducing the adverse factors on spectral analysis by optimization of the experimental conditions [1,2]. The laser power density and focus position (ie the defocus amount) has a significant impact on the structure and intensity of the plasma spectra [3][4][5][6][7][8].…”

Section: Introductionmentioning

confidence: 99%

The Effect of Laser Focus Position on Laser Induced Plasma Characteristics

Zhao

Guan

et al. 2014

AMR

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Laser induced plasma is a relatively complex process which is closely related to many factors. In this paper, using a short pulse Nd:YAG laser and CCD photoelectric detection system, the variation of laser focus position effected by spectral intensity, the ratio of signal to background as well as the self-absorption of the plasma spectral lines with the standard spectra sample of aluminum for analysis samples was studied. Results show that: when the laser focus position is about 5mm under the surface of the sample, the relative intensity and the ratio of signal to background of the spectral lines are the strongest, and the spectral lines are sharp without obvious self-absorption.

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Section: Introductionmentioning

confidence: 99%