碳纳米管x射线管结构的模拟研究

H. Choi, J. Kim
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摘要

目前正在开发一种基于场发射电子源的x射线源,利用碳纳米管(CNTs)应用于生物、医学和材料诊断技术领域。在三极管型x射线源的设计中,精细的光束聚焦是获得高分辨率x射线图像的重要因素。因此,必须优化电极形状和各部分之间的距离等几何参数。在本研究中,模拟了四种不同形状的三极管结构,并根据每个三极管部件的电压条件给出了光束聚焦性能。结果表明,凹形阴极结构具有最佳的光斑尺寸和结构简单性。
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Simulation study of carbon nanotube x-ray tube structure
An X-ray source, which is based on the field emission electron source, is being currently developed by using carbon nano-tubes (CNTs) for the applications to biological, medical and material diagnostic technology fields. In the design of triode type X-ray sources, the fine beam focus is important to acquire high resolution X-ray image. Therefore, the geometrical parameters such as electrode shapes and distances between each part must be optimized. In this study, four different shapes of triode structures were simulated and the beam focusing performances were presented according to voltage conditions of each triode parts. Results show that the concave shape cathode structure shows the best spot size and structural simplicity among the tested in this study.
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