Mechanical Design Of X-ray CCD Detector With Large Image Area

The mechanical sealing is one of main technology in the development of X-ray panel imaging detectors, and the sealing module directly affects the imaging performance by maintaining the detector internal environment constant. A good X-ray detector system is not a simple assembly of various components, but has to be elaborately designed to meet the requirements of the key components of the detector. Non-destructive testing(NDT), especially based on X-ray flat panel detector, has been widely applied in the field of medical, manufacture and so on. The majority of X-ray flat panel detector market, however, has been dominated by foreign players including Cannon, Varian, Thales and IDC. Most domestic companies such as Wandong medical and United medical strongly depend on imports. Therefore, it’s urgent to self-develop high resolution large-area X-ray detector and push forward the process of domestic precision instrument.The main work of this paper is to use computer aided design and virtual technique to design X-ray detector prototype.As the goal of mass production, it’s necessary to design a sealing scheme to meet the requirements of high-resolution large-area flat panel detector package 2 × 2CCD array. This paper is divided into the following four parts: the structure design of X-ray detector based on virtual prototype, X-ray detector package sealing performance evaluation based on ANSYS, the manufacture of an Xray detector assembly and the performance testing.Section 1presents the whole design of high-resolution large-area X-ray detector, and the main components of the virtual prototype includes the seamless mosaic of 2 × 2 fiber tapers, the sealing structure between fiber taper array and 2 × 2CCD array, between liquid cooling system and CCD array, and the installation of a water-cooled head.Section 2is to evaluate the sealing performance of virtual prototype based on the ANSYS analysis. Finite element analysis is used to assess the sealing portion of the probe and cooling systems in connection site before and after the X-ray detector tanks, and proved the mechanical design suite components through pressure cloud picture,and the manufacture process is also presented to obtain assembly prototype.Section 3is about the application of obtained X-ray detector prototype and assessment of its imaging performance. It’s found that the developed X-ray detector reaches the imaging level of similar advanced products of foreign manufacturers. Subsequently,the X-ray detector prototype is applied to such as non-destructive testing and X-ray powder diffraction. The actual imaging picture demonstrates the designed package meet the X-ray detector sealing requirements.