ISSN print edition: 0366-6352
ISSN electronic edition: 1336-9075
Registr. No.: MK SR 9/7
Analysis of the dynamics of laser induced plume propagation from liquid matrix using fast photography
Xing Fan, Jian Xiao, Guang-Zhou Hu, Yun-Peng Zhao, Shi-Gang Kang, Jin-Li Lu, and Hong-Ru Fan
aKey Laboratory of Coal Processing and Efficient Utilization (Ministry of Education), China University of Mining & Technology, Xuzhou 221116, Jiangsu, China
Abstract: Glycerol, a liquid matrix material for matrix-assisted laser desorption ionization mass spectrometry, was irradiated by a tunable pulsed infrared laser at wavelengths of 2.80 μm, 2.94 μm, 3.10 μm and 3.50 μm, covering the OH and CH stretch vibrations. A fast photography system was introduced to analyze the dynamic process of plume propagation induced by laser ablation up to 1000 μs of the delay time. Propagation distance of the plume front was measured and the corresponding velocities were calculated; they varied with the wavelength and decreased with the delay time. At the tunable wavelength of the peak of the OH absorption (3.0 μm), theoretical calculations indicate that energy deposition from the pulsed laser is in the regime of stress confinement. The mode of energy deposition depends on the wavelength of the OH vibration and its distance from the absorption maxima. However, stages after a 10 μs delay at various wavelengths show a certain similarity in the distance of plume propagation, which can be well fitted by a drag model.
Keywords: laser ablation – fast photography – plume propagation – dynamics analysis – drag model
Full paper is available at www.springerlink.com.
Chemical Papers 70 (6) 848–855 (2016)
Tuesday, September 17, 2019