Development of a new optical fiber sensor for radiation and chemical parameters with sensing regions in its cladding

开发一种新型光纤传感器，用于辐射和化学参数，其包层具有传感区域

• 批准号: 14580544
• 负责人: TAKADA Eiji
• 金额: $ 1.98万
• 依托单位: Toyama National College of Technology
• 依托单位国家: 日本
• 项目类别: Grant-in-Aid for Scientific Research (C)
• 财政年份: 2002
• 资助国家: 日本
• 起止时间: 2002 至 2003
• 项目状态: 已结题
• 来源: https://kaken.nii.ac.jp/en/grant/KAKENHI-PROJECT-14580544/
• 关键词: Optical Fiber Sensor; Radiation; Oxygen; Time of Flight Technique; Ruthenium Complex; Sol-Gel Method; Blue Laser Diode; 化学量; シンチレータ; Time of Flight法; 光ファイバ; センサー; クラッド

Current scintillating optical fibers for the measurement of radiation have drawbacks concerning high intrinsic and radiation-induced loss. In order to overcome these problems, a new optical fiber sensor for multi-point radiation measurements has been proposed with sensing regions in its cladding and in the area outside of the core. Scintillation material was composed of polystyrene, PPO, and POPOP. A part of the scintillation photons is trapped inside the fiber core and is transmitted to the ends. The time of flight technique has been applied to the arrival time difference of the photons which are transmitted to each fiber end. Discrete radiation measurements were possible with a time resolution of 4nsec. Linearity of the measured counts has been demonstrated in a dose rate ranging between 4.2μSv to 44μSv. One of the present problems regards the system's difficulty in controlling the measurement efficiency and the transmission loss at the sensing points, which should be due to the mechanical process involved in the fabrication of the sensing regions. A chemical process will be a candidate for the solution of this problem. By choosing the best configuration based on parameter studies, the properties of the sensing system can be improved.

目前用于测量辐射的光纤具有关于高的固有损耗和辐射诱导损耗的缺点。为了克服这些问题，一种新的光纤传感器的多点辐射测量已被提出与传感区在其包层和在该地区以外的核心。闪烁材料由聚苯乙烯、PPO和POPOP组成。一部分闪烁光子被捕获在光纤芯内并传输到端部。飞行时间技术已被应用到传输到每个光纤端的光子的到达时间差。离散辐射测量是可能的，时间分辨率为4纳秒。已在4.2μSv至44μSv的剂量率范围内证明了测量计数的线性。目前的问题之一是系统在控制测量效率和传感点处的传输损耗方面的困难，这应该是由于在传感区域的制造中涉及的机械过程。化学过程将是解决这个问题的一个候选方案。通过参数研究选择最佳结构，可以改善传感系统的性能。

项目成果

Eiji Takada, Daisuke Yamada, Hirofumi Kuroda: "A new optical fiber sensor for multipoint radiation measurement with sensing regions in its cladding"Measurement Science and Technology. (to be published). (2004)

Eiji Takada、Daisuke Yamada、Hirofumi Kuroda：“一种用于多点辐射测量的新型光纤传感器，其包层中有传感区域”测量科学与技术。

Eiji Takada, Daisuke Yamada, Hirofumi Kuroda: "A new optical fiber sensor for multipoint radiation measurement with sensing regions in its cladding"Measurement Science and Technology. 印刷中. (2004)

Eiji Takada、Daisuke Yamada、Hirofumi Kuroda：“一种用于多点辐射测量的新型光纤传感器，其包层中具有传感区域”测量科学与技术 (2004)。

山田大介, 高田英治, 畔田博文: "クラッド部に有感層を持つ光ファイバセンサの開発"第3回先進放射線応用シンポジウム予稿集. 37-39 (2003)

Daisuke Yamada、Eiji Takada、Hirofumi Kawata：“包层中具有敏感层的光纤传感器的开发”第三届高级辐射应用研讨会论文集 37-39 (2003)。