Skip to main content

A method for determining paper processing parameters using terahertz spectroscopy

Resource type
Thesis type
(Thesis) M.Sc.
Date created
To ensure consistency, paper manufacturing requires knowledge of the thickness, areal density, and moisture content of a paper sheet as it is produced. In this thesis, I show that it is possible to use terahertz time-domain spectroscopy to estimate these three parameters. I relate the electromagnetic response of paper to its composition based on an effective medium model that includes an additional term to account for Rayleigh scattering. I show results from Monte Carlo simulations that establish statistical limits on the parameter estimates for this model under realistic conditions, and I assess the performance of the model using experimental results on pulp samples. Finally, I discuss current limitations to the precision of this measurement technique, and suggest methods for improving it.
Copyright statement
Copyright is held by the author.
The author granted permission for the file to be printed and for the text to be copied and pasted.
Scholarly level
Supervisor or Senior Supervisor
Thesis advisor: Dodge, J. Steven
Member of collection
Download file Size
etd6961_IBushfield.pdf 2.19 MB

Views & downloads - as of June 2023

Views: 0
Downloads: 0