Development of a Scintillating Optical Fiber Based Radon Detector


E. A. Christman, I. S. Kim, A. Appleby


The design and development of a detector that uses a scintillating fiber optic bundle as a sensor for ambient levels of radon and its alpha emitting progeny is discussed. The sensor consists of a macroporous fiber bundle composed of close packed 50 micron fibers drawn from scintillating oxide glass. This bundle provides a large accessible surface area and a means of trapping and concentrating radon gas to increase the effective contact time between the radon and the scintillating material. The scintillations generated in the fibers by the alphas from the decay of the radon and the progeny are observed by a photomultiplier tube assembly for counting and analysis in a multi-channel scaling mode. The results of laboratory tests of the sensor as well as some initial ambient radon measurements made with a test device in field trials are discussed.


This abstract was presented at the 33rd Annual Midyear Meeting, "Instrumentation, Measurements, and Electronic Dosimetry", Laboratory Use Session, 1/30/2000 - 2/2/2000, held in Virginia Beach, VA.

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