Kyoung Won JANG, Wook Jae YOO, Jeong Ki SEO, Ji Yeon HEO, Jinsoo MOON, Jang-Yeon PARK, Sin KIM¹, Byung Gi PARK², and Bongsoo LEE^*

School of Biomedical Engineering, Research Institute of Biomedical Engineering, Konkuk University, Chungju 380-701, Korea
¹Department of Nuclear and Energy Engineering, Applied Radiological Science Research Institute, Cheju National University, Cheju 690-756, Korea
²Department of Energy and Environmental Engineering, Soonchunhyang University, Asan 336-745, Korea

(Received May 31, 2010; Revised August 18, 2010; Accepted September 17, 2010)

In this study, we measured scintillating and Cerenkov lights generated in a scintillating fiber-optic sensor using high-energy electron beams and a spectrometer. The spectrum of Cerenkov light generated in a plastic optical fiber was measured with a spectrometer and the intensities of Cerenkov light were measured for irradiated lengths of the plastic optical fiber by integrating the photon counts at every wavelength of the spectrum. The intensities of Cerenkov and scintillating lights were also characterized as a function of the incident angle of an electron beam from a clinical linear accelerator (CLINAC). To minimize or remove Cerenkov light, a subtraction method was employed using a background optical fiber.

Key words: Cerenkov light, scintillator, fiber optics

^*E-mail address: bslee@kku.ac.kr