Particle sizing by spectral analysis on transmission fluctuations

作者：Shen, Jianqi; Yu, Bing; Xu, Yamin; Xu, Feng; Shen, Jiaqi

来源：Powder Technology, 2006, 166(2): 91-99.

DOI：10.1016/j.powtec.2006.05.014

• particle size analysis
• transmission fluctuation
• transmission fluctuation spectrum

Transmission fluctuation spectrometry (TFS) is a method for particle analysis based on the statistical fluctuations of the transmission signal when the particle system is illuminated by a beam with finite beam diameter. The expectancy of the transmission square (ETS) is obtained as a spectrum when the signal is subjected to a procedure of variable spatial and/or temporal averaging. Both the particle size distribution (PSD) and particle concentration can be retrieved. @@@ In this paper, we develop a new method of the spectral analysis on the transmission fluctuations. An analytical expression of the spectrum of the fluctuating transmission through a monolayer is derived and the transmission fluctuation spectrum of a 3-dimensional system is formulated based on the layer model with an assumption of low particle concentration. Theoretical results are proved by simulations and measurements.

• 出版日期2006-8-21
• 单位上海理工大学