Reactor Irradiation Experiments by Advanced Optical Technology

先进光学技术的反应堆辐照实验

• 批准号: 07308037
• 负责人: NAKAZAWA Masaharu
• 金额: $ 7.49万
• 依托单位: University of Tokyo
• 依托单位国家: 日本
• 项目类别: Grant-in-Aid for Scientific Research (A)
• 财政年份: 1995
• 资助国家: 日本
• 起止时间: 1995 至 1997
• 项目状态: 已结题
• 来源: https://kaken.nii.ac.jp/grant/KAKENHI-PROJECT-07308037/
• 关键词: optical technique; nuclear reactor; irradiation experiment; Resonance lonization Spectroscopy; RIS; radiation induced emission, pulsed laser; radiation damage; fast neutron science; レーザー共鳴イオン化分光; 極短パルスレーザー; 原子炉照射; 中性子; 照射損傷; カスケード損傷; 中性子科学

We have developed a high resolution Resonance Ionization Spectroscopy system that can be used for the detection of stable or radioactive isotopes of sub ppd level concentration. The system was tested using Xe gas and several solid elements. Solid samples were atomized by the pulsed ablation laser. We have also tested a single laser system, which can be used for ablation and ionization. Current system showed a better sensitivity than conventional activation foil method. Quantitative evaluation of the system sensitivity and further issues for the practical system were performed.The resolution of laser induced emission was evaluated to be 2mm and online measurement in a neutron field is possible. On the study of very fast detection of radiation induced phenomena, a dynamic CT automatic measurement system was developed and tested with a pulsed electron beam. Both Cherenkov light and scintillation were visualized with sub ns time scale. Irradiation experiment on optics was also performed.Defect formation mechanism in the HCP structure was investigated by a position annihilation measurement technique. The cluster size observed for the cascade damage and its stability were evaluated. Compared with the results from on irradiation experiments, the diffusion effect was separated in the evaluation and the defect cluster formation mechanism was clarified.

我们已经开发了高分辨率电离光谱系统，可用于检测亚PPD水平浓度的稳定或放射性同位素。使用XE气体和几个固体元素对该系统进行了测试。通过脉冲消融激光雾化固体样品。我们还测试了一个激光系统，可用于消融和电离。当前系统比常规激活箔方法显示出更好的灵敏度。对系统敏感性的定量评估和实用系统的进一步问题。激光诱导的排放的分辨率被评估为2mm，并且可以在中子场中进行在线测量。在研究辐射诱导现象的非常快速检测的研究中，开发了动态CT自动测量系统并用脉冲电子束进行测试。 Cherenkov的光和闪烁都以子NS时间尺度可视化。还进行了有关光学的辐照实验。通过位置歼灭测量技术研究了HCP结构中的排列形成机制。评估了级联损伤及其稳定性观察到的簇大小。与辐照实验的结果相比，在评估中分离了扩散效应，并阐明了缺陷簇形成机制。

项目成果

N.Sekimura,Y.Shirao,H.Yamaguchi et al: "Defect Cluster Formation in Vanadium Irradiated with Heavy Ions" to be published in Journal of Nuclear Materials. (1998)

N.Sekimura、Y.Shirao、H.Yamaguchi 等人：“Defect Cluster Formation in Vanadium Irradiated with Heavy Ions”即将发表在 Journal of Nuclear Materials 上。

M.Uesaka,T.Ueda et al: "Generation,Measurement and Application of Synchronized 700fs Electron,100fs T3 Laser and Picoseconds X-ray Single Pulse" AIP Conf.Proc.398. 687-692 (1997)

M.Uesaka、T.Ueda 等人：“同步 700fs 电子、100fs T3 激光和皮秒 X 射线单脉冲的生成、测量和应用”AIP Conf.Proc.398。

M.Nakazawa: "Application of Opitical Fiber to Radiation Measurements" J.Atomic Energy Society of Japan. 38. 33-38 (1996)

M.Nakazawa：“光纤在辐射测量中的应用”J.Atomic Energy Society of Japan。

M.Uesaka, T.Watanabe et al: "Production and Utilizaition of Synchronized Femtosecond Electron and Laser Single Pulses" Journal of Nuclear Materials. 248. 380-385 (1997)

M.Uesaka、T.Watanabe 等人：“同步飞秒电子和激光单脉冲的生产和利用”核材料杂志。

井口 哲夫: "レーザーによる放射能検出" 日本原子力学会誌. Vol.38,No9. 727-729 (1996)

Tetsuo Iguchi：“使用激光进行放射性检测”日本原子能学会杂志，第 38 卷，第 9 期。727-729（1996 年）。