摘要
针对现代航空发动机涡轮叶片等军工和基础重工业领域的现场高能无损检测需求,西华大学加速器团队结合X波段小型化加速器技术,独立自主设计、研制了核心器件X波段2 MeV小焦点加速管,并集成研制了 一台可移动的X波段2 MeV小焦点加速器射线装置.该装置集成了 X波段小焦点驻波加速管、磁控管、微波传输系统、真空系统和屏蔽体组成的加速器机头、高压脉冲调制器、控制系统和冷却系统等分系统.其中,小焦点加速管采用驻波电耦合结构,长度小于100 mm,输出能量为2 MeV,焦点尺寸≤0.7 mm,1 m处剂量率≥40 cGy/min.X波段2 MeV小焦点加速器研制成功后,基于该装置完成了可移动2 MeV小焦点CT系统的搭建,并进行了系统性能的测试和应用,所获取图像空间分辨率显著优于同类型S波段高能CT产品.
Abstract
Targeting the requirements of on-site high-energy non-destructive testing on modem aviation engine turbine blades and other military and basic heavy industry products,the accelerator research team at Xihua University has independently de-signed and developed a core device,the X-band 2 MeV small focus accelerator tube,working with X-band miniaturization ac-celerator technology.They have also integrated and developed a movable X-band 2 MeV small focus accelerator radiation device.The device integrates several subsystems,including X-band small focus standing wave accelerator tube,magnetron,microwave transmission system,accelerator head made of vacuum system and shielding body,high-voltage pulse modulator,control system,and cooling system.Among them,the small focus acceleration tube adopts a standing wave electric coupling structure,with a length of less than 100 mm,an output energy of 2 MeV,a focus size of less than 0.7 mm,and a dose rate of greater than 40 cGy/min at 1 m.After the successful development of the X-band 2 MeV small focus accelerator,a movable 2 MeV small focus CT system was built based on the device,and the system performance was tested and applied.As a result,the obtained image spatial resolution was significantly better than that of similar S-band high-energy CT products.
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