Effect of lens-to-sample distance on spatial uniformity and emission spectrum of flflat-top laser-induced plasma
文献类型：期刊论文
| 作者 | Fu Hongbo ; Wang Huadong; Zhang Mengyang; Wu Bian; Zhang Zhirong
|
| 刊名 | PLASMA SCIENCE & TECHNOLOGY
 |
| 出版日期 | 2022 |
| 卷号 | 24 |
| 关键词 | laser-induced plasma lens-to-sample distance plasma image RSD laser-induced breakdown spectroscopy |
| ISSN号 | 1009-0630 |
| 英文摘要 | The optimal spectral excitation and acquisition scheme is explored by studying the effect of the lensto-sample distance(LTSD) on the spatial homogeneity and emission spectra of flflat-top laser converging spot induced plasma. The energy distribution characteristics before and after the convergence of the laser beam with quasi flflat-top intensity profifile used in this study are theoretically simulated and experimentally measured. For an aspheric converging mirror with a focal length of 100 mm, the LTSD(106 mm≥LTSD≥96 mm) was changed by raising the stainless-steel sample height. The plasma images acquired by ICCD show that there is air breakdown when the sample is below the focal point, and a ring-like plasma is produced when the sample is above the focal point. When the sample is located near the focal point, the plasma shape resembles a hemisphere. Since the spectral acquisition region is confifined to the plasma core and the image contains all the optical information of the plasma, it has a lower relative standard deviation(RSD) than the spectral lines. When the sample surface is slightly higher than the focal plane of the lens, the converging spot has a quasi flflat-top distribution, the spatial distribution of the plasma is more uniform, and the spectral signal is more stable. Simultaneously, there is little difference between the RSD of the plasma image and the laser energy. In order to further improve the stability of the spectral signal, it is necessary to expand the spectral acquisition area. |
| 语种 | 英语 |
| 源URL | [http://ir.hfcas.ac.cn:8080/handle/334002/133194]  |
| 专题 | 中国科学院合肥物质科学研究院 |
| 作者单位 | 中国科学院安徽光学精密机械研究所 |
| 推荐引用方式 GB/T 7714 | Fu Hongbo,Wang Huadong,Zhang Mengyang,et al. Effect of lens-to-sample distance on spatial uniformity and emission spectrum of flflat-top laser-induced plasma[J]. PLASMA SCIENCE & TECHNOLOGY,2022,24. |
| APA | Fu Hongbo,Wang Huadong,Zhang Mengyang,Wu Bian,&Zhang Zhirong.(2022).Effect of lens-to-sample distance on spatial uniformity and emission spectrum of flflat-top laser-induced plasma.PLASMA SCIENCE & TECHNOLOGY,24. |
| MLA | Fu Hongbo,et al."Effect of lens-to-sample distance on spatial uniformity and emission spectrum of flflat-top laser-induced plasma".PLASMA SCIENCE & TECHNOLOGY 24(2022). |
入库方式： OAI收割
来源：合肥物质科学研究院
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