Journal of Radiation Protection and Research

The Korean Association for Radiation Protection (대한방사선방어학회)
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Development of OSL Dosimetry Reader

선량 판독용 OSL 측정장치의 개발

  • Received : 2011.05.19
  • Accepted : 2012.01.17
  • Published : 2012.03.30
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Abstract

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 $Al_2O_3:C$, 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 $Al_2O_3:C$ OSL material. It was found to be comparable with that of commercial Riso reader system.

개인 선량계로 활용될 수 있는 광자극발광(OSL: optically stimulated luminescence) 측정장치의 개발과 이를 위한 이론적 배경 및 개발된 장치의 성능에 대하여 기술하였다. OSL 측정장치는 자극광원과 시료로부터 자극 발광된 광신호 사이의 간섭효과를 최소화하기 위하여 다양한 광학적 필터 조합을 구성해야 하는데, 여기서는 자극광에는 GG420 필터를, 측정부에는 UG11과 BG39 필터로 $Al_2O_3:C$ OSL 물질에 최적화된 광학적 필터를 구성하였다. 자극광원으로 Luxeon V형 고휘도 Blue LED를 선택함으로서 충분한 광량을 확보하였다. 또한 장비 제어 및 측정을 위하여 PC와 OSL 장치 사이에 다양한 제어보드들이 이용되며, 전체 장치의 자동화 및 장치제어는 LabView 프로그램을 이용하여 개발하였다. 개발된 OSL 장치의 신뢰도 및 재현성 평가를 위해 대표적인 OSL 물질인 $Al_2O_3:C$를 이용하여 OSL 특성곡선을 측정하고 이를 기존 상용 OSL 측정장치와 비교하였다.

Keywords

References

  1. Huntley DJ, Godfrey-Smith DI, Thewalt MLW. Optical dating of sediments. Nature 313:105-107; 1985. https://doi.org/10.1038/313105a0
  2. Bulur E. An alternative technique for optically stimulated luminescence (OSL) experiments. Radiat. Meas. 26(5):701-709; 1996. https://doi.org/10.1016/S1350-4487(97)82884-3
  3. Bulur E, Botter-Jensen L, Murray AS. Optically stimulated luminescence from quartz measured using the linear modulation technique. Radiat. Meas. 32:407-411; 2000. https://doi.org/10.1016/S1350-4487(00)00115-3
  4. Bulur E, Botter-Jensen L, Murray AS. LM-OSL signals from some insulators: an analysis of the dependency of the detrapping probability on stimulation light intensity. Radiat. Meas. 33:715-719; 2001. https://doi.org/10.1016/S1350-4487(01)00089-0
  5. Botter-Jensen L, Duller GAT. A new system for measuring optically stimulated luminescence from quartz samples. Nucl. Tracks Radiat. Meas. 20:549-553; 1992. https://doi.org/10.1016/1359-0189(92)90003-E
  6. Bulur E, Goksu HY, Wahl W. Infrared (IR) stimulated luminescence from ${\alpha}-Al_2O_3$:C. Radiat. Meas. 29(6):625-638; 1998. https://doi.org/10.1016/S1350-4487(98)00076-6
  7. Galloway RB. On the stimulation of luminescence with green light emitting diodes. Radiat. Meas. 23;547-550; 1994. https://doi.org/10.1016/1350-4487(94)90097-3
  8. Botter-Jensen L. Luminescence techniques : instrumentation and methods. Radiat. Meas. 27:749-768; 1997. https://doi.org/10.1016/S1350-4487(97)00206-0
  9. Botter-Jensen L, Mejdahl V, Murray AS. New light on OSL. Quat. Geochronol. 18:303-309; 1998.
  10. Botter-Jensen L, Bulur E, Duller GAT, Murray AS. Advances in luminescence instrument systems. Radiat. Meas. 32:523-528; 2000. https://doi.org/10.1016/S1350-4487(00)00039-1
  11. Smetana F, Hajek M, Bergmann R, Brusl H, Fugger M, Gratzl W, Kitz E, Vana N. A portable multi-purpose OSL Reader for UV dosimetry at workplaces. Radiat. Meas. 43:516-519; 2008. https://doi.org/10.1016/j.radmeas.2008.01.006
  12. Botter-Jensen L, McKeever SWS, Wintle AG. Optically stimulated luminescence dosimetry. Amsterdam; Elsevier Science. 2003:27-29.
  13. Chung KS, Park CY, Lee JI, Kim JL. Development of a new curve deconvolution algorithm for optically stimulated luminescence. Radiat. Meas. 45:320-322; 2010. https://doi.org/10.1016/j.radmeas.2009.12.042
  14. Mishra DR, Kulkarni MS, Rawat NS, Muthe KP, Gupta SK, Bhatt BC, Sharma DN. Non-linear light modulation OSL phenomenon. RRadiat. Meas. 43:1177-1186; 2008. https://doi.org/10.1016/j.radmeas.2008.04.093
  15. Botter-Jensen L, McKeever SWS, Wintle AG. Optically stimulated luminescence dosimetry. Amsterdam; Elsevier Science. 2003:318-325.

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