Development of Bending Proton Beam Radiography

弯曲质子束射线照相技术的发展

• 批准号: 13680587
• 负责人: TAKAHASHI Osamu
• 金额: $ 2.11万
• 依托单位: KY0T0 UNIVERSITY
• 依托单位国家: 日本
• 项目类别: Grant-in-Aid for Scientific Research (C)
• 财政年份: 2001
• 资助国家: 日本
• 起止时间: 2001 至 2002
• 项目状态: 已结题
• 来源: https://kaken.nii.ac.jp/grant/KAKENHI-PROJECT-13680587/
• 关键词: proton radiography; bending beam; boiling bubble; visualization; heat pipe; high speed camera; non-destructive inspection; 可視線; 微小流路

High sensitive and high resolution real-time proton radiography system has been developed. When an opaque fluid is used as a working fluid and the test section is made of metal, optical method cannot be used for the visualization of the boiling bubbles. It has been difficult to visualize with X-ray or neutron beams because of the high speed events such as behaviors of boiling bubbles. In these case, it may be expected that proton radiography is useful. Because proton radiography is depends on the rapid change of ionizing power of proton with distance near the end of their range and is used with a high flux of proton beams. In the study, the visualization of the dynamic events such as boiling bubbles in a flat plate heat pipe made of many turns of meandering capillaries tunnel was investigated by using bending proton beam radiography. The direction of the applied proton beam radiography was either perpendicular or parallel to the direction of gravity.The monochromatic proton beam of 13 Hey was used. Test section were irradiated with proton beam flux of about 10^<11> particles/cm^2.a on a flat plat heater and then proton radiography of boiling bubbles were taken on the fluorescent screen near by the test section. Images of bubbles recorded with the high speed video camera.

开发出高灵敏度、高分辨率的实时质子射线照相系统。当使用不透明流体作为工作流体并且测试部分由金属制成时，不能使用光学方法来观察沸腾气泡。由于沸腾气泡行为等高速事件，很难用 X 射线或中子束进行可视化。在这些情况下，可以预期质子射线照相术是有用的。因为质子射线照相取决于质子电离功率随距离接近其范围末端的快速变化，并且与高通量的质子束一起使用。在这项研究中，通过使用弯曲质子束射线照相技术，研究了动态事件的可视化，例如由多匝蜿蜒毛细管隧道制成的平板热管中的沸腾气泡。所施加的质子束射线照相的方向与重力方向垂直或平行。使用13Hey的单色质子束。在平板加热器上用约10^11粒子/cm^2.a的质子束通量照射测试部分，然后在测试部分附近的荧光屏上拍摄沸腾气泡的质子射线照相。用高速摄像机记录的气泡图像。