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KMID : 0364920120370010010
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Journal of Radiation Protection and Research
2012 Volume.37 No. 1 p.10 ~ p.15
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Development of OSL Dosimetry Reader
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Park Chang-Young
Chung Ki-Soo
Lee Jong-Duk
Jang In-Su
Lee Jung-Il
Kim Jang-Lyurl
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Abstract
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Design and performance test results of a newly developed optically stimulated luminescence (OSL) measurement system are presented in this paper. Generally, different types of optical filters are used in OSL reader system to minimize the interference of the stimulation light in the OSL signal. For optically stimulation of Al2O3:C, we have arrived at an optimal combination of the filters, i.e., GG420 filter for filtering the stimulating light source, and a combined UG11 and BG39 filter at the detecting window (PMT). By using a high luminance blue LED (Luxeon V), sufficient luminous intensity could be obtained for optically stimulation. By using various control boards, the OSL reader device was successfully interfaced with a personal computer. A software was developed to deliver required commands to operate the OSL reader by using the LabView program (National Instruments, Inc.). In order to evaluate the reliability and the reproducibility of newly designed-OSL reader. Performance testing of the OSL reader was carried out for OSL efficiency, OSL decay curve and signal to noise ratio of the standard Al2O3:C OSL material. It was found to be comparable with that of commercial Riso reader system.
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KEYWORD
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OSL, TL, Dosimetry, OTOR model
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