Development of X-ray Acoustic Spectrometer Using Synchrotron Radiation

同步辐射X射线声谱仪的研制

• 批准号: 02505001
• 负责人: MASUJIMA Tsutomu
• 金额: $ 23.68万
• 依托单位: HIROSHIMA UNIVERSITY
• 依托单位国家: 日本
• 项目类别: Grant-in-Aid for Developmental Scientific Research (A)
• 财政年份: 1990
• 资助国家: 日本
• 起止时间: 1990 至 1992
• 项目状态: 已结题
• 来源: https://kaken.nii.ac.jp/grant/KAKENHI-PROJECT-02505001/
• 关键词: Photoacoustics; X-ray Absorption; Syncrotron Radiation; EXAFS; Imaging Analysis; Non-destructive Evaluation; Photo-Thermal Phenomena; X線-音響効果; 焦電効果; photoacoustics; spectrometor; X-ray analysis; X-ray absorption; Photoacoustics; Spectrometer

Apparatus and methods for X-ray Acoustic Spectroscopy (XAS) which was innovated by our research group were developed using synchrotron radiation X-ray source.1.Development of ApparatusAn X-ray acoustic (XA) detector (XA cell) using a electret was developed. X-ray chopper, 1st ion chamber, this XA cell and 2nd ion chamber were aligned in sequence on a optical stage. The XA cell was mounted on the X-Z pulse-stage in order to get the 2 dimensional scanning of the sample for imaging. The scanning of this stage and data acquisition from a lock-in amplifier and the two pico-ampere meters were regulated by a microcomputer using GP-IB bas line. A total system for XAS which can be operated automatically was finally assembled and established.A new detector which detects the movement of a vibrating membrane optically, we call "optical microphone" was also developed for more sensitivity. One more new detection method using a photopyroelectric sensor, PVDF polymer film, was successfully developed which is also sensitive and can be used under vacuum.2.Development of MethodologyThis method is unique in the ability of non-destructive sub-surface evaluation of materials. For this purpose, X-ray was modulated in semi-pulse shape and irradiated on to the samples. It was found that the delayed signal components was originated from a sub-surface material. By scanning of X-ray beam, the distribution of materials under the surface was revealed. We call this method as "Semi-Pulse XAS method". XA-EXAFS spectroscopy and XA-imaging using focused X-ray beam were also developed and applied successfully to various model samples to find the potentials for analysis of atomic structure and 3-dimensional non-destructive evaluation of materials.

本课题组利用同步辐射X射线源研制了X射线声学谱仪（XAS）装置和方法。1.装置研制采用驻极体的X射线声学（XA）探测器（XA池）。X射线斩波器、第一离子室、该XA室和第二离子室在光学台上顺序对准。XA单元安装在X-Z脉冲平台上，以便获得用于成像的样品的二维扫描。该级的扫描和锁相放大器及两个皮安表的数据采集均由微机采用GP-IB基准线进行调节。最后组装并建立了一套可自动运行的XAS系统，并开发了一种新型的光学检测器，我们称之为“光学麦克风”，用于检测振动膜的运动。成功地开发了一种新的检测方法，该方法使用压电传感器，PVDF聚合物膜，该传感器也是敏感的，并且可以在真空下使用。2.方法的发展该方法在材料的非破坏性亚表面评估能力方面是独特的。为此，将X射线调制成半脉冲形状并照射到样品上。结果发现，延迟信号分量是源于亚表面材料。通过X射线束的扫描，揭示了材料在表面下的分布。我们称这种方法为“半脉冲XAS法”。还开发了使用聚焦X射线束的XA-EXAFS光谱和XA成像，并成功地应用于各种模型样品，以发现原子结构分析和材料三维无损评价的潜力。

项目成果

S.Kawano,T.Masujima,T.Toyoda,H.Shiwaku,M.Ando,Y.Amemiya,H.Imai,G.Tamai,I.Wada,K.Ikeda,T.Hiraga: "Subtraction Imaging by X-ray Photoacoustic Signal Amplitude" Photon Factory Activity Report. 8. 314 (1990)

S.Kawano，T.Masujima，T.Toyoda，H.Shiwaku，M.Ando，Y.Amemiya，H.Imai，G.Tamai，I.Wada，K.Ikeda，T.Hiraga：“X-减法成像

T.Masujima,H.Kobayashi,T.Hinoue,Y.Yokoyama,T.Toyoda,H.Shiwaku,Y.Amemiya,A.Iida,M.Ando,S.Takahara,S.Kawano: "Scanning X-ray Photoacoustic Imaging for Elemental analysis" Photon Factory Activity Report. 9. 260 (1991)

T.Masujima、H.Kobayashi、T.Hinoue、Y.Yokoyama、T.Toyoda、H.Shiwaku、Y.Amemiya、A.Iida、M.Ando、S.Takahara、S.Kawano：“扫描 X 射线光声

T.Toyoda,T.Masujima,H.Shiwaku,A.Iida,M.Ando: "Sample Thickness and Chopping Frequency Dependence in X-ray Photoacoustic Signal Intensity of Pure Cu" Photon Factory Activity Report. 9. 324 (1991)

T.Toyoda、T.Masujima、H.Shiwaku、A.Iida、M.Ando：“纯铜 X 射线光声信号强度中的样品厚度和斩波频率依赖性”光子工厂活动报告。

T.Toyoda,T.Masujima,H.Shiwaku,M.Ando: "Dependence of the X-ray Photoacoustic Signal Intensity of Brass on Sample Thickness and Modulation Frequency" Jpn.J.Appl.Phys.31. 2648-2649 (1992)

T.Toyoda、T.Masujima、H.Shiwaku、M.Ando：“黄铜的 X 射线光声信号强度对样品厚度和调制频率的依赖性”Jpn.J.Appl.Phys.31。

T. Masujima: "X-ray Photoacoustic for Characterization and Non-destructive Evaluation" Photoacoustic Photothermal Phenomena. II. 222-234 (1990)

T. Masujima：“用于表征和无损评估的 X 射线光声”光声光热现象。