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Proceedings Paper

Irradiation tests of radiation resistance optical fibers for fusion diagnostic application
Author(s): Tsunemi Kakuta; Tatsuo Shikama; Takeo Nishitani; Shin Yamamoto; Shinji Nagata; Bun Tsuchiya; Kentaro Toh; Junichi Hori
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Paper Abstract

To promote development of radiation-resistant core optical fibers, the ITER-EDA (International Thermonuclear Experimental Reactor-Engineering Design Activity) recommended carrying out international round-robin irradiation tests of optical fibers to establish a reliable database for their applications in the ITER plasma diagnostics. Ten developed optical fibers were irradiation-tested in a Co-60 gamma cell, a Japan Materials Testing Reactor (JMTR). Also, some of them were irradiation tested in a fast neutron irradiation facility of FNS (Fast Neutron Source), especially to study temperature dependence of neutron-associated irradiation effects. Included were several Japanese fluorine doped fibers and one Japanese standard fiber (purified and undoped silica core), as well as seven Russian fibers. Some of Russian fibers were drawn by Japanese manufactures from Russian made pre-form rods to study effects of manufacturing processes to radiation resistant properties. The present paper will describe behaviors of growth of radiation-induced optical transmission loss in the wavelength range of 350-1750nm. Results indicate that role of displacement damages by fast neutrons are very important in introducing permanent optical transmission loss. Spectra of optical transmission loss in visible range will depend on irradiation temperatures and material parameters of optical fibers.

Paper Details

Date Published: 26 November 2002
PDF: 6 pages
Proc. SPIE 4786, Penetrating Radiation Systems and Applications IV, (26 November 2002); doi: 10.1117/12.451742
Show Author Affiliations
Tsunemi Kakuta, Japan Atomic Energy Research Institute (Japan)
Tatsuo Shikama, Tohoku Univ. (Japan)
Takeo Nishitani, Japan Atomic Energy Research Institute (Japan)
Shin Yamamoto, Japan Atomic Energy Research Institute (Japan)
Shinji Nagata, Tohoku Univ. (Japan)
Bun Tsuchiya, Tohoku Univ. (Japan)
Kentaro Toh, Tohoku Univ. (Japan)
Junichi Hori, Japan Atomic Energy Research Institute (Japan)


Published in SPIE Proceedings Vol. 4786:
Penetrating Radiation Systems and Applications IV
H. Bradford Barber; Hans Roehrig; F. Patrick Doty; Lisa J. Porter; Edward J. Morton, Editor(s)

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