Staff View: Effects of hydroxyl content in pure silica optical fiber exposed to kGy electron beams

Effects of hydroxyl content in pure silica optical fiber exposed to kGy electron beams

We present a study on the effect of high dose (kGy) electron beams on pure silica core fibers through examining the following phenomena within the fibers: radioluminescence (RL), radiation induced attenuation (RIA), and recovery. The objective is to identify the relevant characteristics of these fib...

Full description

Saved in:

Bibliographic Details
Main Authors:	Oresegun, A., Zubair, H.T., Ghassan, L., Abdul-Rashid, H. A., Hashim, S. A., Bradley, D.A. *
Format:	Article
Published:	Elsevier 2021
Subjects:	R895-920 Medical Physics/Medical Radiology
Online Access:	http://eprints.sunway.edu.my/1581/ http://doi.org/10.1016/j.radphyschem.2020.108975
Tags:	Add Tag No Tags, Be the first to tag this record!

id	my.sunway.eprints.1581
record_format	eprints
spelling	my.sunway.eprints.15812021-02-15T05:21:15Z http://eprints.sunway.edu.my/1581/ Effects of hydroxyl content in pure silica optical fiber exposed to kGy electron beams Oresegun, A. Zubair, H.T. Ghassan, L. Abdul-Rashid, H. A. Hashim, S. A. Bradley, D.A. * R895-920 Medical Physics/Medical Radiology We present a study on the effect of high dose (kGy) electron beams on pure silica core fibers through examining the following phenomena within the fibers: radioluminescence (RL), radiation induced attenuation (RIA), and recovery. The objective is to identify the relevant characteristics of these fibers having favourable radiation response, that can be utilized in the development of dose measurement systems for high dose (kGy) environments. Two types of 20 m long pure silica optical fiber samples have been used, differing in their concentrations of hydroxyl (OH) content. Segments of 3.5 m length from each fiber were wound into coils of radius ~25 cm and exposed to consecutive irradiation doses, in the order of tens of kGy (10 kGy through 70 kGy in individual exposures), leading to a cumulative dose of some 300 kGy. The low-OH fiber showed saturation of response at the shorter wavelengths of the RL spectrum for doses of 30 kGy and above, resulting from presence of Oxygen Defect Centers (ODC). At the longer wavelengths the RL response of the low-OH optical fibers is observed to increase with dose, attributed to various bonding structural defects of silica nanoclusters. The saturation effect at shorter wavelengths is less prominent in the high-OH samples, where a monotonic increase is observed up to ~60 kGy indicating the formation of radiation induced ODC beyond this point. For cumulative dose of ~70 kGy, the highest RIA losses were registered at 550 nm (12.74 dB/m) for low-OH sample, and at 460 nm (4.75 dB/m) for high-OH sample. The high-OH sample showed much faster recovery post-irradiation, making it more suitable for repeated usage. Both the RL and RIA phenomena observed herein show the feasibility of pure silica optical fibers for dose measurement in high dose (kGy) environments up to individual dose of ~70 kGy. Elsevier 2021-01 Article PeerReviewed Oresegun, A. and Zubair, H.T. and Ghassan, L. and Abdul-Rashid, H. A. and Hashim, S. A. and Bradley, D.A. * (2021) Effects of hydroxyl content in pure silica optical fiber exposed to kGy electron beams. Radiation Physics and Chemistry, 178. p. 108975. ISSN 0969-806X http://doi.org/10.1016/j.radphyschem.2020.108975 doi:10.1016/j.radphyschem.2020.108975
institution	Sunway University
building	Sunway Campus Library
collection	Institutional Repository
continent	Asia
country	Malaysia
content_provider	Sunway University
content_source	Sunway Institutional Repository
url_provider	http://eprints.sunway.edu.my/
topic	R895-920 Medical Physics/Medical Radiology
spellingShingle	R895-920 Medical Physics/Medical Radiology Oresegun, A. Zubair, H.T. Ghassan, L. Abdul-Rashid, H. A. Hashim, S. A. Bradley, D.A. * Effects of hydroxyl content in pure silica optical fiber exposed to kGy electron beams
description	We present a study on the effect of high dose (kGy) electron beams on pure silica core fibers through examining the following phenomena within the fibers: radioluminescence (RL), radiation induced attenuation (RIA), and recovery. The objective is to identify the relevant characteristics of these fibers having favourable radiation response, that can be utilized in the development of dose measurement systems for high dose (kGy) environments. Two types of 20 m long pure silica optical fiber samples have been used, differing in their concentrations of hydroxyl (OH) content. Segments of 3.5 m length from each fiber were wound into coils of radius ~25 cm and exposed to consecutive irradiation doses, in the order of tens of kGy (10 kGy through 70 kGy in individual exposures), leading to a cumulative dose of some 300 kGy. The low-OH fiber showed saturation of response at the shorter wavelengths of the RL spectrum for doses of 30 kGy and above, resulting from presence of Oxygen Defect Centers (ODC). At the longer wavelengths the RL response of the low-OH optical fibers is observed to increase with dose, attributed to various bonding structural defects of silica nanoclusters. The saturation effect at shorter wavelengths is less prominent in the high-OH samples, where a monotonic increase is observed up to ~60 kGy indicating the formation of radiation induced ODC beyond this point. For cumulative dose of ~70 kGy, the highest RIA losses were registered at 550 nm (12.74 dB/m) for low-OH sample, and at 460 nm (4.75 dB/m) for high-OH sample. The high-OH sample showed much faster recovery post-irradiation, making it more suitable for repeated usage. Both the RL and RIA phenomena observed herein show the feasibility of pure silica optical fibers for dose measurement in high dose (kGy) environments up to individual dose of ~70 kGy.
format	Article
author	Oresegun, A. Zubair, H.T. Ghassan, L. Abdul-Rashid, H. A. Hashim, S. A. Bradley, D.A. *
author_facet	Oresegun, A. Zubair, H.T. Ghassan, L. Abdul-Rashid, H. A. Hashim, S. A. Bradley, D.A. *
author_sort	Oresegun, A.
title	Effects of hydroxyl content in pure silica optical fiber exposed to kGy electron beams
title_short	Effects of hydroxyl content in pure silica optical fiber exposed to kGy electron beams
title_full	Effects of hydroxyl content in pure silica optical fiber exposed to kGy electron beams
title_fullStr	Effects of hydroxyl content in pure silica optical fiber exposed to kGy electron beams
title_full_unstemmed	Effects of hydroxyl content in pure silica optical fiber exposed to kGy electron beams
title_sort	effects of hydroxyl content in pure silica optical fiber exposed to kgy electron beams
publisher	Elsevier
publishDate	2021
url	http://eprints.sunway.edu.my/1581/ http://doi.org/10.1016/j.radphyschem.2020.108975
_version_	1692994472408776704
score	13.211869

Effects of hydroxyl content in pure silica optical fiber exposed to kGy electron beams

Similar Items