Studies on Radiation Response of Optical Fibers

光纤辐射响应的研究

• 批准号: 01580228
• 负责人: IIDA Toshiyuki
• 金额: $ 1.02万
• 依托单位: Osaka University
• 依托单位国家: 日本
• 项目类别: Grant-in-Aid for General Scientific Research (C)
• 财政年份: 1989
• 资助国家: 日本
• 起止时间: 1989 至 1990
• 项目状态: 已结题
• 来源: https://kaken.nii.ac.jp/grant/KAKENHI-PROJECT-01580228/
• 关键词: Radiation resistant optical fiber; Radiation response; Induced-loss; Pure silica core optical fiber; Charge trap level; Dose; Color center; Damage mechanism; 伝送損失増加係数; 回復速度係数; 線質依存性; 放射線ハ-ドニング効果; フォトブリ-チング効果

Various radiation-resistant optical fibers were irradiated with 14-MeV neutrons, thermal neutrons ^<60>Co gamma-rays. The induced loss in light transmission was measured in-situ during irradiation. The radiation response of optical fibers was approximately explained by using an equation for the density of color centers related to charge trap levels in optical fibers under irradiation. Also experimental results showed there was not large difference in effects between 14-MeV neutron and ^<60>Co gamma-ray irradiations. This means that radiation response of optical fibers is influenced predominately by ionization effects closely related with dose, rather than by structural changes due to neutron displacement effects. However, response of B-doped optical fibers to thermal neutrons was different from that to other radiations. There was also large difference in the induced loss rate between thermal neutron and other irradiations. The ^<10>B (n, alpha) ^7Li reaction affects light transmission in not whole but specialized region of the optical fibers. The difference may be explained by the microscopic examination of the damage mechanism of optical fibers. This is not discussed in the present study but is an important subject in the future.

用14 MeV中子、热中子、Co γ射线辐照各种抗辐射光纤<60>。在辐照过程中原位测量光透射的诱导损失。利用光纤中色心密度与电荷陷阱能级的关系式，近似地解释了光纤的辐射响应。实验结果还表明，14 MeV中子辐照和γ-Co辐照的效应差别不大<60>。这意味着光纤的辐射响应主要受与剂量密切相关的电离效应的影响，而不是由中子位移效应引起的结构变化。然而，掺硼光纤对热中子的响应不同于对其他辐射的响应。热中子与其它辐照方式的感生损失率也有很大差异。^<10>B（n，alpha）^7 Li反应影响的不是光纤的整个区域，而是特定区域的光传输。这种差异可以通过对光纤损伤机制的显微镜检查来解释。本研究报告没有讨论这一问题，但这是今后的一个重要课题。

项目成果

Toshiyuki Iida: "Some Comments on Design of Fusion Diagnostic Systinis Using Optical Fibers." J.Nucl.Sci.Technol.

Toshiyuki Iida：“对使用光纤的融合诊断系统设计的一些评论。”

Toshiyuki Iida, et al.: ""Effects of 14-MeV Neutron Irradiation on some Components for Fusion Diagnostics"" Proc. of 16th Symposium on Fusion Technology.

Toshiyuki Iida 等人：“14-MeV 中子辐照对聚变诊断某些组件的影响”Proc。

Toshiyuki Iida, et al.: ""Effects of 14-MeV Neutron Irradiation on Optical Components for Fusion Diagnostifs"" J. Nucl. Sci. Technol.27[3]. 651-662 (1990)

Toshiyuki Iida 等人：“14-MeV 中子辐照对融合诊断光学元件的影响”J. Nucl。

Toshiyuki Iida,et al.: "Effects of 14ーMev Neutron Irradiation on Optical Components for Fusion Diagnostics" To be published in Proc.of 16th symposium on Fusion Technology.

Toshiyuki Iida等人：“14-Mev中子辐照对聚变诊断光学元件的影响”将发表在第16届聚变技术研讨会的Proc.of上。

Toshiyuki Iida,etal.: "Ettects of 14ーMeV Neutron Irradiation on Optical Components Fusion Diagnostics" J.Nucl.Sci.Technol.27[3]. 651-662 (1990)

Toshiyuki Iida 等人：“14-MeV 中子辐照对光学元件聚变诊断的影响”J.Nucl.Sci.Technol.27[3] (1990)。