Abstract
We have confirmed the importance of temperature and dose rate for the response of Ge-doped fibers to radiation. A phenomenological model have been found to account for temperature and dose rate effects. From this model it is possible to make dose predictions from attenuation measurements when the temperature and dose rate are known. Ge-doped fibers have been found to have a relatively low sensitivity to both neutron and gamma radiation. In addition, temperature and dose rate dependencies complicate the analysis. However we point out that these problems may all be solved if we use fibers, such as P-doped fibers, which contain color centers of long lifetime. This would remove both the temperature and dose rate dependencies that complicate the use of Ge-doped fibers, in addition the radiation sensitivity is increased. Finally OTDR has been investigated as a possible read-out method for distributed radiation measurements. For our system the minimum pulse length was 3ns, giving a spatial resolution in the meter range and a response length to radiation of about 10 m if accurate dose values where to be obtained. We found OTDR to be a suitable method for radiation induced attenuation measurements in optical fibers, especially for long fiber lengths
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Jensen, F;
Inouchi, Goro;
Takada, Eiji;
Takahashi, Hiroyuki;
Iguchi, Tetsuo;
Nakazawa, Masaharu;
[1]
Kakuta, Tsunemi
- Tokyo Univ. (Japan). Faculty of Engineering
Citation Formats
Jensen, F, Inouchi, Goro, Takada, Eiji, Takahashi, Hiroyuki, Iguchi, Tetsuo, Nakazawa, Masaharu, and Kakuta, Tsunemi.
Development of a distributed radiation detection system using optical fibers.
Japan: N. p.,
1996.
Web.
Jensen, F, Inouchi, Goro, Takada, Eiji, Takahashi, Hiroyuki, Iguchi, Tetsuo, Nakazawa, Masaharu, & Kakuta, Tsunemi.
Development of a distributed radiation detection system using optical fibers.
Japan.
Jensen, F, Inouchi, Goro, Takada, Eiji, Takahashi, Hiroyuki, Iguchi, Tetsuo, Nakazawa, Masaharu, and Kakuta, Tsunemi.
1996.
"Development of a distributed radiation detection system using optical fibers."
Japan.
@misc{etde_485905,
title = {Development of a distributed radiation detection system using optical fibers}
author = {Jensen, F, Inouchi, Goro, Takada, Eiji, Takahashi, Hiroyuki, Iguchi, Tetsuo, Nakazawa, Masaharu, and Kakuta, Tsunemi}
abstractNote = {We have confirmed the importance of temperature and dose rate for the response of Ge-doped fibers to radiation. A phenomenological model have been found to account for temperature and dose rate effects. From this model it is possible to make dose predictions from attenuation measurements when the temperature and dose rate are known. Ge-doped fibers have been found to have a relatively low sensitivity to both neutron and gamma radiation. In addition, temperature and dose rate dependencies complicate the analysis. However we point out that these problems may all be solved if we use fibers, such as P-doped fibers, which contain color centers of long lifetime. This would remove both the temperature and dose rate dependencies that complicate the use of Ge-doped fibers, in addition the radiation sensitivity is increased. Finally OTDR has been investigated as a possible read-out method for distributed radiation measurements. For our system the minimum pulse length was 3ns, giving a spatial resolution in the meter range and a response length to radiation of about 10 m if accurate dose values where to be obtained. We found OTDR to be a suitable method for radiation induced attenuation measurements in optical fibers, especially for long fiber lengths and long time scales where questions of light source stability becomes important for other systems. (S.Y.)}
place = {Japan}
year = {1996}
month = {Jul}
}
title = {Development of a distributed radiation detection system using optical fibers}
author = {Jensen, F, Inouchi, Goro, Takada, Eiji, Takahashi, Hiroyuki, Iguchi, Tetsuo, Nakazawa, Masaharu, and Kakuta, Tsunemi}
abstractNote = {We have confirmed the importance of temperature and dose rate for the response of Ge-doped fibers to radiation. A phenomenological model have been found to account for temperature and dose rate effects. From this model it is possible to make dose predictions from attenuation measurements when the temperature and dose rate are known. Ge-doped fibers have been found to have a relatively low sensitivity to both neutron and gamma radiation. In addition, temperature and dose rate dependencies complicate the analysis. However we point out that these problems may all be solved if we use fibers, such as P-doped fibers, which contain color centers of long lifetime. This would remove both the temperature and dose rate dependencies that complicate the use of Ge-doped fibers, in addition the radiation sensitivity is increased. Finally OTDR has been investigated as a possible read-out method for distributed radiation measurements. For our system the minimum pulse length was 3ns, giving a spatial resolution in the meter range and a response length to radiation of about 10 m if accurate dose values where to be obtained. We found OTDR to be a suitable method for radiation induced attenuation measurements in optical fibers, especially for long fiber lengths and long time scales where questions of light source stability becomes important for other systems. (S.Y.)}
place = {Japan}
year = {1996}
month = {Jul}
}