光谱学与光谱分析 |
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A Measurement of Optical Emission from the Rear Surface with Solid Targets Irradiated by Ultrashort Pulse Laser |
WANG Guang-chang1, 2,3,ZHENG Zhi-jian3,YANG Xiang-dong2*,GU Yu-qiu3,LIU Hong-jie3,WEN Tian-shu3, GE Fang-fang3,JIAO Chun-ye3,ZHOU Wei-min3, ZHANG Shuang-gen2,3, WANG Xiang-xian2,3 |
1. Teaching and Research Section of Physics, Chengdu Medical College, Chengdu 610081, China 2. Atom and Molecule Physics Institute, Sichuan University, Chengdu 610065, China 3. Research Center of Laser Fusion, Academy of Engineering Physics of China, Mianyang 621900, China |
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Abstract The integrated image spectrum and scattering light spectrum of optical emission at normal direction from rear-side of a metallic foil were measured, employing optical CCD camera and OMA optical multi-channel spectrometer. The integrated image spectrum shows that it presents a ring-shape, and in the near margin of the ring-shape a bright localized signal is shown, which is optical transition radiation (OTR) generated by hot electrons transport through solid targets. The scattering spectrum shows that it presents a series of nonperiodic sharp spikes between 300-500 nm, and the sharp spike is ascribed to the coherent transition radiation (CTR) generated by bunches of hot electron beams generated in v×B acceleration mechanism near 400 nm(2 ω). The intensity of transition radiation decreases with the increase of the target thickness.
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Received: 2005-03-28
Accepted: 2005-06-26
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Corresponding Authors:
YANG Xiang-dong
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Cite this article: |
WANG Guang-chang,ZHENG Zhi-jian,YANG Xiang-dong, et al. A Measurement of Optical Emission from the Rear Surface with Solid Targets Irradiated by Ultrashort Pulse Laser [J]. SPECTROSCOPY AND SPECTRAL ANALYSIS, 2006, 26(05): 785-789.
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URL: |
https://www.gpxygpfx.com/EN/Y2006/V26/I05/785 |
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