Optical characteristics of aluminum coated fused silica core fibers under 14 MeV fusion neutron irradiation

K. Toh, T. Shikama, Shinji Nagata, B. Tsuchiya, T. Suzuki, K. Okamoto, N. Shamoto, M. Yamauchi, T. Nishitani

研究成果: Conference article査読

16 被引用数 (Scopus)

抄録

The optical properties of Al-coated fused silica core optical fibers were observed under 14 MeV fast neutrons irradiation with samples pre-annealed at 150 and 300 °C. With the pre-annealing treatment, the optical absorption could be decreased except for the Si-OH (1390 nm). Under fast neutron irradiation, the radiation-induced transmission loss of pre-annealed fiber at 150 °C was over five times larger than that annealed at 300 °C. It is believed that the precursors of optical absorption were decreased by the annealing treatment. Under irradiation, the optical absorption at 1390 nm had characteristic changes. The absorption at 1390 nm was small during the irradiation and became large once the irradiation stopped. This behavior was only observed for the 1390 nm absorption. It is believed that the increase of the transmission loss under irradiation was caused by the atomic displacement by fast neutrons of Si-OHs and that the displaced Si-OHs recovered when the irradiation stopped.

本文言語English
ページ(範囲)1495-1498
ページ数4
ジャーナルJournal of Nuclear Materials
329-333
1-3 PART B
DOI
出版ステータスPublished - 2004 8月 1
イベントProceedings of the 11th Conference on Fusion Research - Kyoto, Japan
継続期間: 2003 12月 72003 12月 12

ASJC Scopus subject areas

  • 核物理学および高エネルギー物理学
  • 材料科学(全般)
  • 原子力エネルギーおよび原子力工学

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