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PAN Congyuan (潘从元), DU Xuewei (杜学维), ZENG Qiang (曾强), YU Yunsi (于云偲), WANG Shengbo (王声波), WANG Qiuping (王秋平). A Study of the Laser-Induced Breakdown Spectroscopy of Carbon in the Ultraviolet Wavelength Range Under Vacuum Conditions[J]. Plasma Science and Technology, 2015, 17(8): 682-686. DOI: 10.1088/1009-0630/17/8/12
Citation: PAN Congyuan (潘从元), DU Xuewei (杜学维), ZENG Qiang (曾强), YU Yunsi (于云偲), WANG Shengbo (王声波), WANG Qiuping (王秋平). A Study of the Laser-Induced Breakdown Spectroscopy of Carbon in the Ultraviolet Wavelength Range Under Vacuum Conditions[J]. Plasma Science and Technology, 2015, 17(8): 682-686. DOI: 10.1088/1009-0630/17/8/12

A Study of the Laser-Induced Breakdown Spectroscopy of Carbon in the Ultraviolet Wavelength Range Under Vacuum Conditions

  • The influence of a vacuum on the laser-induced breakdown spectroscopy (LIBS) of carbon in the ultraviolet wavelength range is studied. Experiments are performed with graphite using a LIBS system, which consists of a 1064 nm Nd:YAG laser, a vacuum pump, a spectrometer and a vacuum chamber. The vacuum varies from 10 Pa to 1 atm. Atomic lines as well as singly and doubly charged ions are confirmed under the vacuums. A temporal evolution analysis of intensity is performed for the atomic lines of C I 193.09 nm and C I 247.86 nm under different vacuum conditions. Both time-integrated and time-resolved intensity evolutions under vacuums are achieved. The lifetimes of the two atomic lines have similar trends, which supports the point of view of a ‘soft spot’. Variations of plasma temperature and electron density under different vacuums are measured. This study is helpful for research on carbon detection using LIBS under vacuum conditions.
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