Loading web-font TeX/Main/Regular
Current Location: > Detailed Browse

The Shielding Design of Distributed X-ray Source

请选择邀稿期刊:
Abstract: [Background]: The shielding structure is an important guarantee for the safe application of X-ray tube and plays a key role in the implementation of engineering practice. Different from the structural characteristics of traditional single-focus X-ray tube, the radiation protection and shielding design of distributed X-ray tube require targeted research. [Purpose]: This study aims to design and validate an effective shielding structure for distributed X-ray sources to ensure radiation safety while maintaining practical feasibility. This work provides a feasible technical solution for design and protection of shielding structures for distributed X-ray source. [Methods]: In this paper, using Monte Carlo simulation calculation method simulated and studied the radiation field and shielding structure of distributed X-ray tube. A design method of uniformly thick shielding structure was proposed for each shielding surface, especially along the focal distribution direction. Monte Carlo simulation was performed with 45 focal spots distributed linearly, operating at 160 kV anode voltage and 15 mA anode current. The simulation explored lead shielding thicknesses ranging from 1 to 6 mm. [Results]: The simulation calculation results showed that the distributed X-ray source has line source characteristics. By simulating the leakage dose rate levels of various shielding surfaces at different shielding thicknesses, the lead shielding structure with thickness of 5-6 mm on each surface was designed and assembled with an X-ray tube. The results indicated that it was feasible to adopt a uniform thickness shielding design on all shielding surfaces, for the new distributed X-ray tube, especially in the focal distribution direction. The deviation between simulation and actual measurements was consistently below 25%, validating the reliability of the simulation approach. The points with higher leakage rates were located in the front lower middle and rear lower middle, with leakage rates of 2.4 μSv/h and 2.92 μSv/h, respectively, and it was in accord with the characteristics of the line source and reflective target structure of a distributed X-ray tube. The leakage rates at the top, bottom, left and right were lower than 2 μSv/h and 1 μSv/h, respectively. [Conclusions]: By adopting a shielding structure with uniform thickness on all sides of the X-ray tube, the leakage dose rate at each point meets the requirement of a leakage dose rate limit of less than 5 μSv/h.

Version History

[V2] 2025-05-15 17:35:54 ChinaXiv:202505.00175V2 Download
Download
Preview
License Information
metrics index
  •  Hits1896
  •  Downloads247
Comment
Share
Apply for expert review