Axial variation of average size of methane clusters in a gas jet produced by supersonic expansion of methane through a cylindrical nozzle of 0.8 mm in diameter is observed using a Rayleigh scattering method. The scattered light intensity exhibits a power scaling on the backing pressure ranging from 16 to 50 bar, and the power is strongly Z dependent varying from 8.4 (Z=3 mm) to 5.4 (Z=11 mm), which is much larger than that of the argon cluster. The scattered light intensity versus axial position shows that the position of 5 mm has the maximum signal intensity. The estimation of the average cluster size on axial position Z indicates that the cluster growth process goes forward until the maximum average cluster size is reached at $Z=9$ mm, and the average cluster size will decrease gradually for Z>9 mm.
Axial variation of average size of methane clusters in a gas jet produced by supersonic expansion of methane through a cylindrical nozzle of 0.8 mm in diameter is observed using a Rayleigh scattering method. The scattered light intensity exhibits a power scaling on the backing pressure ranging from 16 to 50 bar, and the power is strongly Z dependent varying from 8.4 (Z=3 mm) to 5.4 (Z=11 mm), which is much larger than that of the argon cluster. The scattered light intensity versus axial position shows that the position of 5 mm has the maximum signal intensity. The estimation of the average cluster size on axial position Z indicates that the cluster growth process goes forward until the maximum average cluster size is reached at $Z=9$ mm, and the average cluster size will decrease gradually for Z>9 mm.
(Plasma production and heating by laser beams (laser-foil, laser-cluster, etc.))
引用本文:
HAN Ji-Feng;YANG Chao-Wen;MIAO Jing-Wei;LU Jian-Feng;LIU Meng;LUO Xiao-Bing;SHI Mian-Gong. An Experimental Observation of Axial Variation of Average Size of Methane Clusters in a Gas Jet[J]. 中国物理快报, 2010, 27(4): 43601-043601.
HAN Ji-Feng, YANG Chao-Wen, MIAO Jing-Wei, LU Jian-Feng, LIU Meng, LUO Xiao-Bing, SHI Mian-Gong. An Experimental Observation of Axial Variation of Average Size of Methane Clusters in a Gas Jet. Chin. Phys. Lett., 2010, 27(4): 43601-043601.
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