Potential application of pure silica optical flat fibers for radiation therapy dosimetry

The thermoluminescence characteristics and the glow curves of Thulium doped silica fiber exposed to 10MV photon and 21MeV electron radiation

“…The following time-temperature profile (TTP) was applied: 5.0 s preheat at the temperature of 60°C, the linear heating rate profile up to the maximum temperature of 400°C, heating rate of 16°C s À 1 and results in acquisition time of 25 s. All readings were taken under N 2 gas flow, suppressing oxidation and potential triboluminesence. The homogeneity test was performed for all samples with the method described by Alawiah et al (2015).…”

“…The dosimeter and sample experimental setup on a solid water phantom. Another solid water layer was placed on top of the set-up to provide for chargedparticle equilibrium (Alawiah et al, 2015). extracted the kinetic parameters of the glow peaks and their evaluation based on the TL model will be discussed in Section 3.3.…”

“…Previous researchers had observed that the TL performance of an irradiated optical fibers is influenced by the type of fiber including the type of dopant material, diameter of the fiber core, the shape of fiber and the type of radiation (Hashim et al, 2010;Ramli et al, 2009;Abdul Rahman et al, 2011;Yaakob et al, 2011;Ong et al, 2009;Alawiah et al, 2013Alawiah et al, , 2015.…”

The thermoluminescence glow curve and the deconvoluted glow peak characteristics of erbium doped silica fiber exposed to 70–130 kVp x-rays

“…The TL reading of each Er-doped silica CF sample was normalized to the mass of the sample. Tests of homogeneity of response under fixed doses for all fibers were performed by the method described by Alawiah et al (2015b).…”

“…At lower energies fiber of any core diameter has a greater TL response and greater efficiency than that at higher photon energies (Bradley et al, 2012). The TL response of silica optical fibers under irradiation are influenced by many factors, including: the preform manufacturing conditions, the fabrication parameters used in producing the optical fiber, the preform deposition temperature, fiber drawing process characteristicsdrawing speed, fiber drawing tension, furnace temperature, oxygen-to-reagent ratio (Girard et al, 2007), dopants present in the optical fiber core or cladding (pure silica, or doped) (Alawiah et al, 2015a(Alawiah et al, , 2015bMady et al, 2010;Paul et al, 2009) and the type of radiation to which the optical fiber is exposed Yaakob et al, 2011;Hashim et al, 2010).…”