This Article Full Text (PDF) References Alert me when this article is cited Alert me if a correction is posted Services Email this article to a friend Similar articles in this journal Alert me to new issues of the journal Add to Saved Citations Download to citation manager Request Permissions Request Reprints Add to My Marked Citations Citing Articles Citing Articles via Google Scholar Citing Articles via Scopus Google Scholar Articles by Bom, V.R. Articles by van de Vorst, J.G.G. Search for Related Content Social Bookmarking                         What's this?

Gamma - ray tomography in fluidised beds using a gamma camera

Radiation Technology Group, Interfacultair Reactor Instituut, Delft University of Technology, Mekelweg 15, 2629JB, Delft, The Netherlands

C.W.E. van Eijk

Radiation Technology Group, Interfacultair Reactor Instituut, Delft University of Technology, Mekelweg 15, 2629JB, Delft, The Netherlands

G. Jonkers

Shell Research and Technology Center Amsterdam, P.O. Box 38000, 1030BN, Amsterdam, The Netherlands

P.T. Por

Radiation Technology Group, Interfacultair Reactor Instituut, Delft University of Technology, Mekelweg 15, 2629JB, Delft, The Netherlands

J.G.G. van de Vorst

Shell Research and Technology Center Amsterdam, P.O. Box 38000, 1030BN, Amsterdam, The Netherlands

This paper describes the design and the optimisation of a gamma-ray tomography tool to be used for the measure ment of the particle density in fluidised beds. The set-up consists of a radioactive line source (35 cm long) perpendicular to the axis of the bed (15 cm diameter) and a standard medical gamma camera equipped with a lead collimator (~ 0.02 rad acceptance angle). An optimum gamma-ray energy of ~ 200 keV is deduced. It is shown that no corrections for imperfect collimation are necessary given the small acceptance angle of the collimator. It is estimated that the density profile can be obtained with an absolute accuracy of ± 25 kg/m3 and a spatial resolution of 2.5 mm. The maximum source strength is limited by the maximum count rate of the gamma camera. With a ⁷⁵Se source of 130 mCi the measuring time for a density profile under the assumption of cylinder symmetry is in the order of 150 s.

Key Words: Tomography • fluidised bed • simulation

Transactions of the Institute of Measurement and Control, Vol. 20, No. 4, 178-185 (1998)
DOI: 10.1177/014233129802000403


CiteULike    Complore    Connotea    Del.icio.us    Digg    Reddit    Technorati    Twitter    What's this?