Infrared high-resolution emission spectroscopy of metal compounds produced by laser ablation

激光烧蚀产生的金属化合物的红外高分辨率发射光谱

• 批准号: 10640503
• 负责人: KAWAGUCHI Kentarou
• 金额: $ 2.11万
• 依托单位: OKAYAMA UNIVERSITY (1999)National Astronomical Observatory of Japan (1998)
• 依托单位国家: 日本
• 项目类别: Grant-in-Aid for Scientific Research (C)
• 财政年份: 1998
• 资助国家: 日本
• 起止时间: 1998 至 1999
• 项目状态: 已结题
• 来源: https://kaken.nii.ac.jp/grant/KAKENHI-PROJECT-10640503/
• 关键词: High-resolution Spectroscopy; Laser Ablation; Metal compounds; 高分解能フーリエ変換型分光; 赤外発光; 低温マトリックス分光; 赤外アレイ検出器

The purpose of this project is to test a new spectroscopic system for detecting infrared emission from metal compounds produced by laser ablation. Experiments are summarized as follows,(1) Construction of a grating spectrometer with an InSb array detectorThe spectrometer consists of a grating with the size of 120 x 140 mm, reflecting mirror, slits etc. A Czerny-Turner configuration was used. The spectrometer covers 1-5 μm with a relative resolution of 40,000. The read-out system for the array detector was constructed using multi-channel A/D board, clock generator, and driver board. The control was carried out by using a workstation SUN-IV.(2) Construction of vacuum chamber for laser ablation.The chamber installed a pulse nozzle, a metal rod with rotation mechanism, and pumped with a 10" diffusion pump. By observing the NィイD22ィエD2O signal millimeter wavelength region, it was conformed that the molecules were cooled down to about 50 K.(3) Observation of Low-temperature matrix isolation spectra.As a test of ablation, we observed the vibration spectra of carbon chain molecules CィイD23ィエD2, CィイD24ィエD2, CィイD25ィエD2, and CィイD212ィエD2 K Ar matrix, which was produced by the laser ablation from a carbon rod.(4) Construction of data acquisition system for Fourier transform spectrometer.We developed a new type data acquisition system for pulsed laser or pulse discharge by using a recently available a chip computer. A signal of He-Ne fringe from the FT spectrometer is used to produce a trigger for pulse laser or pulse discharge after processing by the chip computer, and a new data acquisition system was also arranged for the pulse laser usage.

本项目的目的是测试一种新的光谱系统，用于检测激光烧蚀产生的金属化合物的红外发射。实验总结如下：(1)利用InSb阵列探测器的光栅光谱仪的研制该光谱仪由120×140 mm的光栅、反射镜、狭缝等组成，采用切尔尼特纳结构。该光谱仪覆盖范围为1-5μm，相对分辨率为40,000。阵列探测器的读出系统由多通道A/D板、时钟发生器和驱动板构成。利用SUN-IV工作站进行控制。(2)激光消融真空室的构建。真空室安装脉冲喷嘴、带旋转机构的金属棒和10英寸扩散泵泵浦。通过观察NィイD22ィエD2O信号的毫米波长区，证实了分子冷却到了约50K。(3)低温矩阵隔离光谱观察。作为烧蚀测试，我们观察了碳链分子CィイD23ィエD2，CィイD24ィエD2，CィイD25ィエD2，CィイD212ィエD2 K Ar的振动光谱，(4)傅里叶变换光谱仪数据采集系统的构建。利用最近上市的一台单片计算机，研制了一种新型的脉冲激光或脉冲放电数据采集系统。利用傅立叶变换光谱仪输出的He-Ne条纹信号，经单片机处理后，产生脉冲激光或脉冲放电的触发信号，并为脉冲激光的应用设置了新的数据采集系统。