Development of an asymetric optical resonator for the monochromatic gamma-ray source

单色伽马射线源非对称光学谐振腔的研制

• 批准号: 23561018
• 负责人: NAGAI Ryoji
• 金额: $ 2.58万
• 依托单位: Japan Atomic Energy Agency
• 依托单位国家: 日本
• 项目类别: Grant-in-Aid for Scientific Research (C)
• 财政年份: 2011
• 资助国家: 日本
• 起止时间: 2011 至 2013
• 项目状态: 已结题
• 来源: https://kaken.nii.ac.jp/grant/KAKENHI-PROJECT-23561018/
• 关键词: レーザーコンプトン散乱; 光共振器; 放物面鏡; 単色ガンマ線源; レーザー・コンプトン散乱

A high intensity monochromatic gamma-ray source from the laser Compton scattering (LCS) is a very useful probe for a nondestructive assay system by means of nuclear resonance fluorescence. The accuracy improvement of the measurement system is attained by further developing a pure monochromatic LCS source. Since, the monochromaticity of the LCS light source is restricted by the energy spread of the mode-locked short pulse laser, an ultra-narrow band width laser should be used for instead of the short pulse laser. An enhancement cavity for the pure monochromatic LCS source has been developed in this study. An asymmetric confocal Fabry-Perot optical resonator was proposed as an enhancement cavity of the pure monochromatic LCS source. In the result of the study, it was shown clearly that the mirrors of the asymmetric optical resonator should be parabolic mirrors. The influences due to the distortion and the misalignment of the mirrors were evaluated by a raytrace method.

激光康普顿散射(LCS)产生的高强度单色伽马射线源是核共振荧光无损检测系统中非常有用的探头。通过进一步研制纯单色液晶光源，提高了测量系统的精度。由于锁模短脉冲激光器的能量扩散限制了LCS光源的单色性，因此应该使用超窄带宽激光器来代替短脉冲激光器。研制了一种用于纯单色液晶光源的增强腔。提出了一种非对称共焦法布里-珀罗光学谐振腔作为单色液晶光源的增强腔。研究结果表明，非对称光学谐振腔的反射镜应为抛物面反射镜。用光线追踪法分析了反射镜的变形和不对准对系统的影响。

项目成果

単色ガンマ線LCS のための非対称型ファブリペロー共振器用放 物面鏡の評価

单色伽马射线LCS非对称法布里-珀罗腔抛物面镜评估

• 作者: 永井 良治;羽島 良一
• 通讯作者: 羽島 良一