Application of image-intensifier for the development of the direct observation of weak images of electron-microscope

图像增强器在电子显微镜弱​​图像直接观察中的应用

• 批准号: 59880006
• 负责人: TOKONAMI Masayasu
• 金额: $ 2.69万
• 依托单位: Faculty of Science, University of Tokyo
• 依托单位国家: 日本
• 项目类别: Grant-in-Aid for Developmental Scientific Research
• 财政年份: 1984
• 资助国家: 日本
• 起止时间: 1984 至 1986
• 项目状态: 已结题
• 来源: https://kaken.nii.ac.jp/en/grant/KAKENHI-PROJECT-59880006/
• 关键词: electron microscopy electron-microscope; in situ observation; microchannel plate; MCP; MCP; 画像記録; 電子線照射量

Electron-microscopy has provided information on a wide variety of materials problems. With the availability of electron-microscopes with a high-resolution its field of application has been extended greatly.In recent years, "in situ" observation of various phenomena within the specimen holder has caught the interest of many investigators, where bright images with a high resolution are indispensable. Cases are also often met with, which we can obtain only considerably thick specimens. In each case, we need such a strong radiation of electron beam or a long exposure time to record pictures on conventional films as the specimens are in danger of being totally damaged. There are also another cases the specimen essentially suffer serious damage even by fairly weak irradiation. It was the purpose of the present investigation to develop a system suitable for obtaining bright images with high contrast using only a weak electron beam by containing a microchannel plate (MCP), the quality of which has been rapidly augmented, into the electron-microscope. A set of mount and flange has been specially designed in order to include the MCP into the electron-microscope. Furthermore, a high-sensitive TV camera, a video tape recorder and a personal computer have been arranged in line with the total planning. In the last result of the present investigation, we could reduce the total amount of the radiation of electron beam to around 1/50 compared with the conventional technique to record the same picture. The effect of the electron amplification of the MCP has brought a marked increase in the brightness and a distinct improvement in the resolution of the whole system. Hence our present purpose has been successfully achieved.

电子显微镜提供了关于各种材料问题的信息。随着高分辨率电子显微镜的出现，它的应用范围得到了极大的扩展，近年来，对样品保持器内各种现象的“原位”观察引起了许多研究者的兴趣，而高分辨率的明亮图像是必不可少的。也经常遇到这样的情况，我们只能得到相当厚的标本。在每一种情况下，我们都需要如此强的电子束辐射或长时间的曝光来在传统胶片上记录图像，因为样品有被完全损坏的危险。也有另一种情况，即使是相当弱的照射，样品也会受到严重的损伤。本研究的目的是开发一种适合于仅使用弱电子束通过包含微通道板（MCP）获得具有高对比度的明亮图像的系统，该微通道板的质量已经迅速增强，进入电子显微镜。为了将微通道板安装到电子显微镜中，设计了一套特殊的安装座和法兰。此外，高灵敏度的电视摄像机，录像机和个人电脑已被安排在符合总体规划。在本研究的最后结果中，与记录相同图像的常规技术相比，我们可以将电子束的辐射总量减少到约1/50。微通道板的电子放大效应使整个系统的亮度和分辨率都有了明显的提高。因此，我们目前的目的已经成功地达到了。

项目成果

床次正安: 学術月報. 12. 941 (1986)

Tokotsugi 正康：学术月报 12. 941 (1986)。

Masayasu Tokonami: "Application of image-intensifier for the development of the direct observation of weak images of electron-microscope" Japanese Scientific Monthly. 39. 941 (1986)

Masayasu Tokonami：“图像增强器在电子显微镜弱​​图像直接观察中的应用”日本科学月刊。

床次正安: 表面科学. 7. 117-120 (1986)

Masayasu Tokotsugu：表面科学。7. 117-120 (1986)