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Proceedings Paper

Optical image sensors and their application in radon detection
Author(s): Ryan H. Griffin; N. Garry Tarr
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Paper Abstract

This paper reports on the development and testing of a direct reading radon detector assembled from consumer electronics at very low cost. An electrostatic concentrator constructed by metalizing a plastic funnel is used to focus charged radon progeny onto the exposed surface of an optical image sensor from a webcam. Alpha particles emitted by the collected progeny strike the image sensor, generating sufficient charge to completely saturate one or more pixels The high voltage required by the concentrator is generated using a simple Cockcroft-Walton charge pump. A personal computer is used to analyze the webcam data. Alpha particles were counted at a rate of 5.2 counts/ hour at a radon concentration of 159 Bq/ m3.

Paper Details

Date Published: 11 October 2013
PDF: 7 pages
Proc. SPIE 8915, Photonics North 2013, 89151C (11 October 2013); doi: 10.1117/12.2033635
Show Author Affiliations
Ryan H. Griffin, Carleton Univ. (Canada)
N. Garry Tarr, Carleton Univ. (Canada)

Published in SPIE Proceedings Vol. 8915:
Photonics North 2013
Pavel Cheben; Jens Schmid; Caroline Boudoux; Lawrence R. Chen; André Delâge; Siegfried Janz; Raman Kashyap; David J. Lockwood; Hans-Peter Loock; Zetian Mi, Editor(s)

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