Mathematical Modeling and Application of Aperture Type of Collimated Beam Apparatus for Fluence Measurement and Radiometer Calibration
Publication: Journal of Environmental Engineering
Volume 146, Issue 12
Abstract
In the application of ultraviolet (UV light), it is necessary to obtain reliable information on UV effectiveness, i.e., one should know the fluence reached by microorganisms or the dose absorbed by chemicals. For this reason, a collimated beam apparatus (CBA) is widely used. International Ultraviolet Association (IUVA) recommends a protocol on CBA in which the beams are assumed to be collimated. In this work, focusing on the fact that so-called collimated beams are not really collimated, a mathematical model for CBA is established, and the influencing factors and specifications of CBA are rigorously analyzed. The aperture type not only has high measurement accuracy, but its specific characteristics are also suitable for the calibration of radiometers in chemical actinometers. The suitable conditions for the calibration are also investigated.
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Data Availability Statement
All data, models, and code generated or used during the study appear in the published article.
Acknowledgments
This work was funded by Shenzhen Municipal Government (Grant No. JCYJ20180306170551939).
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Published In
Journal of Environmental Engineering
Volume 146 • Issue 12 • December 2020
Copyright
© 2020 American Society of Civil Engineers.
History
Received: Feb 12, 2020
Accepted: Jul 1, 2020
Published online: Sep 18, 2020
Published in print: Dec 1, 2020
Discussion open until: Feb 18, 2021
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