TY - JOUR
T1 - Structural and optical changes in silica-based optical fibers exposed to high neutron and gamma fluences
AU - Morana, Adriana
AU - Cheymol, Guy
AU - Reghious, I.
AU - Boukenter, Aziz
AU - Schlegel, M.L.
AU - Goussarov, Andrei
AU - Marin, Emmanuel
AU - Ouerdane, Youcef
AU - Destouches, Christophe
AU - Girard, Sylvain
N1 - Score=10
PY - 2021/8/28
Y1 - 2021/8/28
N2 - The optical fiber (OF) silica glass compaction is the least studied effect induced by radiation, since it takes place at very high fluences, mainly in mixed environments combining γ-rays and neutrons. Although the radiation induced structural reorganization has already been investigated in bulk materials, OFs are a more complex case study, due to its in homogeneous nature and internal stress distribution. We hereby investigate the structural changes induced in a pure-silica core OF by fast neutron fluence of up to 5 × 1019 n/cm2 and total γ-dose of ~4 GGy(SiO2), through micro-Raman spectroscopy allowing us to study the radial distribution of several signatures. The structural changes induced by neutrons on this OF are weaker than those observed on bulk glass at similar fluences, in agreement with the lower observed compaction. The main cause is the higher irradiation temperature, even if a key role is played by the internal stress present in the fibers.
AB - The optical fiber (OF) silica glass compaction is the least studied effect induced by radiation, since it takes place at very high fluences, mainly in mixed environments combining γ-rays and neutrons. Although the radiation induced structural reorganization has already been investigated in bulk materials, OFs are a more complex case study, due to its in homogeneous nature and internal stress distribution. We hereby investigate the structural changes induced in a pure-silica core OF by fast neutron fluence of up to 5 × 1019 n/cm2 and total γ-dose of ~4 GGy(SiO2), through micro-Raman spectroscopy allowing us to study the radial distribution of several signatures. The structural changes induced by neutrons on this OF are weaker than those observed on bulk glass at similar fluences, in agreement with the lower observed compaction. The main cause is the higher irradiation temperature, even if a key role is played by the internal stress present in the fibers.
KW - Silica
KW - Compaction
KW - Neutrons
KW - Raman spectroscopy
KW - Optical fibers
KW - Radiation
UR - https://ecm.sckcen.be/OTCS/llisapi.dll/open/47767167
U2 - 10.1016/j.jnoncrysol.2021.121150
DO - 10.1016/j.jnoncrysol.2021.121150
M3 - Article
SN - 0022-3093
VL - 574
SP - 1
EP - 8
JO - Journal of Non-Crystalline Solids
JF - Journal of Non-Crystalline Solids
M1 - 121150
ER -