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Improved E-beam prediction in compact X-ray tube with ceramic charging
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- Authors
- Sora Park, Yujung Ahn, Jun-Tae Kang, Sunghoon Choi, Ji-Hwan Yeon, Ensol Go, Yoon-Ho Song, Jin-Woo Jeong
- Issue Date
- 2025-02
- Citation
- Surfaces and Interfaces, v.59, pp.1-5
- ISSN
- 2468-0230
- Publisher
- Elsevier BV
- Language
- English
- Type
- Journal Article
- Abstract
- To achieve optimal X-ray tube performance, it is crucial to control the position and size of the electron beam (e-beam) on the anode target. These e-beam characteristics can be predicted using charged-particle optical simulations with external field distributions. In vacuum-sealed, compact digital X-ray tubes that use ceramics as the insulating material between electrodes, the close proximity between the insulator and the e-beam increases the influence of the insulator's electrical properties. This study introduces a model that effectively incorporates the ceramic surface charging (CSC) effect into finite element analysis- based simulations to improve the accuracy of e-beam characteristic predictions. Comparative validation with experimental results from a unit test device shows that the CSC model predicts the e-beam trajectory and spot shape characteristics more accurately than existing models. Moreover, we also confirmed that the accuracy of predicting the trends in focal spot characteristics of actual X-ray tubes was improved.
- KSP Keywords
- Beam characteristics, Digital X-ray, E-beam, Electrical properties, Electron beam, External field, Field distribution, Finite Element(FE), Focal spot, Insulating materials, Optical simulation