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^ 60 Co伽马射线照射各种抗辐射光纤。在照射过程中原位测量光传输中引起的损失。光纤的辐射响应可以通过使用与辐射下光纤中的电荷陷阱水平相关的色心密度方程来近似解释。实验结果还表明14-MeV中子和^ 60 Co伽马射线照射之间的效果没有大的差异。这意味着光纤的辐射响应主要受到与剂量密切相关的电离效应的影响，而不是中子位移效应引起的结构变化的影响。然而，掺硼光纤对热中子的响应与对其他辐射的响应不同。热中子辐照与其他辐照的诱导损失率也存在较大差异。 ^ 10 B(n，α) ^ 7Li反应影响光纤的整个区域而不是特定区域的光传输。这种差异可以通过光纤损伤机制的显微镜检查来解释。这在本研究中没有讨论，但是未来的一个重要课题。

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)。