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Fundamentals of transmission fluctuation spectrometry with variable spatial averaging

✍ Scribed by Jianqi Shen; Ulrich Riebel; Marcus Breitenstein; Udo Kräuter

Publisher
Elsevier
Year
2003
Tongue
English
Weight
112 KB
Volume
1
Category
Article
ISSN
1672-2515

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✦ Synopsis

Transmission signal of radiation in suspension of particles performed with a high spatial and temporal resolution shows significant fluctuations, which are related to the physical properties of the particles and the process of spatial and temporal averaging. Exploiting this connection, it is possible to calculate the particle size distribution (PSD) and particle concentration. This paper provides an approach of transmission fluctuation spectrometry (TFS) with variable spatial averaging. The transmission fluctuations are expressed in terms of the expectancy of transmission square (ETS) and are obtained as a spectrum, which is a function of the variable beam diameter. The reversal point and the depth of the spectrum contain the information of particle size and particle concentration, respectively.

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The Fundamentals of Particle Size Analys
The Fundamentals of Particle Size Analysis by Transmission Fluctuation Spectrometry. Part 1: A Theory of Temporal Transmission Fluctuations in Dilute Suspensions
✍ Marcus Breitenstein; Udo Kräuter; Ulrich Riebel 📂 Article 📅 1999 🏛 John Wiley and Sons 🌐 English ⚖ 194 KB

The extinction of radiation in suspensions is traditionally described by the Bouger-Lambert-Beer law (BLBL). Based on a quasicontinuum approach, the BLBL does not account for the discrete nature of particles or their spatial extension and arrangement. If an extinction measurement is made with a high