摘要
X射线管焦斑是X射线管的主要性能指标。其大小直接影响射线成像及照相灵敏度。X射线管作为X射线检测设备的发射源,其性能直接决定了检查设备对物体的图像分辨率指标。小焦斑X射线管的研制,要求其在保证一定发射功率前提下,能够连续稳定工作;既满足检查小零件及高图像分辨率方面需求,又能有效避免X射线管因焦斑过小所造成的靶面烧伤;具有重大现实意义。通过对其结构设计、制造工艺及工作可靠性方面的深入研究,现已成功研制出"小焦斑X射线管"。测试表明:此研究产品在拥有小焦斑特性同时,具有相当的高压稳定性。应用此研究,可开发系列小焦斑X射线管。此产品的成功应用,有望促进X射线检测设备整体水平的提高。
A novel type of the X-ray tube with small focal spot has been successfully developed to meet the application requirements in a variety of security checks.The original work in the design of X-ray tube with small spots included the V–shaped filament,rectangular hole in the cathode,modified anode structure with a reduction of the distance between the electron incident slit and the tungsten target,and degassing of the anode made of new materials by high-frequency inductive heating and by electron sputtering.A prototyped X-ray tube with small focal spot was fabricated and tested.The test results show that the focal spot of the newly-developed X-ray tube ranges from 0.1 mm to 0.6 mm,and that the X-ray tube is capable of continuously operating with high resolution,high stability,high reliability,and long lifetime.
出处
《真空科学与技术学报》
EI
CAS
CSCD
北大核心
2013年第7期670-673,共4页
Chinese Journal of Vacuum Science and Technology
关键词
小焦斑X射线管
小焦点X射线管
图像清晰度
焦斑尺寸
Small focus X-ray tube
Small focal spot X-ray tube
Imaging definition
Focal spot size
作者简介
联系人：E-mail：wmagqz@fiscan．cn
