Assessment of GeB Doped SiO2 optical fiber for the application of remote radiation sensing system

A., Alawiah and Fadhli, M. M. and Bauk, S. and Abdul-Rashid, Hairul Azhar and Maah, M.J. (2013) Assessment of GeB Doped SiO2 optical fiber for the application of remote radiation sensing system. In: Micro/Nano Materials, Devices, and Systems. SPIE Digital Library, pp. 1-16. ISBN 9780819498144

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Abstract

The research and development efforts on the silica (SiO2) optical fiber for application in radiation sensing and other dosimetry field have become quite active. The widely used LiF based dosimeter (TLD) has shown a relatively low reproducibility and there is a time delay in dose assessment which loses its capability as direct real-time dose assessment dosimeters unlike diodes. The macroscopic size of the optical fiber generally does not allow direct in vivo dose sensing in the inner organ for radiotherapy and medical imaging. A flat optical fiber (FF) with nominal dimensions of (0.08 x10 x 10) mm3 of pure silica SiO2 and GeO2 with Boron doped silica fiber SiO2 was selected for this research. The Germanium was used a dopant to enhance the flat optical fiber to reach much higher responsiveness and dose sensitivity in high energy and high dose irradiation. Together with this combination, both TLD dimension and dose assessment issues was hoped to be overcome. The research conducted by comparing the response of pure silica SiO2 flat optical fiber with a GeO2 with Boron doped silica SiO2 flat optical fiber. The FF sample was annealed at 400°C for one hour before irradiated. Kinetic parameters and dosimetric glow curve of TL response and sensitivity were studied with respect to the electron beam of high dose of micro beam irradiation of 1.0 kGy, 5.0 kGy, 10.0 kGy, 50.0 kGy, 100.0 kGy, 500.0 kGy, and 1.0 MGy using Singapore Synchrotron Light Source's (PCIT) beamline.

Item Type: Book Section
Additional Information: Micro/Nano Materials, Devices, and Systems James Friend; H. Hoe Tan Melbourne, Victoria, Australia | December 08, 2013
Subjects: T Technology > TA Engineering (General). Civil engineering (General)
Divisions: Faculty of Engineering (FOE)
Depositing User: Ms Nurul Iqtiani Ahmad
Date Deposited: 04 Mar 2014 02:08
Last Modified: 04 Mar 2014 02:08
URI: http://shdl.mmu.edu.my/id/eprint/5358

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