[OPTICAL REVIEW Vol. 18, No. 1 (2011) 176-179]
© 2011 The Japan Society of Applied Physics

Measurements and Removal of Cerenkov Light Generated in Scintillating Fiber-Optic Sensor Induced by High-Energy Electron Beams Using a Spectrometer

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