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A Ceramic Surface Charging Model for Accurate Prediction of E-beam Trajectory in Field Emission Digital X-ray Sources
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- Authors
- Yujung Ahn, Sora Park, Jin-Woo Jeong, Eunsol Go, Jeong-Woong Lee, Jae-Woo Kim, Jun-Tae Kang, Seong Jun Kim, Ki Nam Yun, Sunghoon Choi, Ji-Hwan Yeon, Sunghee Kim, Yoon-Ho Song
- Issue Date
- 2022-04
- Citation
- International Vacuum Electronics Conference (IVEC) 2022, pp.1-2
- Language
- English
- Type
- Conference Paper
- Abstract
- In a digital x-ray source based on a field-emitted electron beam (e-beam), it is important to control the position and size of the focused e-beam at the anode surface, to achieve required performances. For this purpose, e-beam trajectory prediction is performed using a charged particle optical simulation in the geometries of the designed x-ray tube. In this study, to more accurately predict the e-beam trajectory inside a vacuum-sealed digital x-ray tube whose electrodes are insulated with a ceramic material, we newly introduce a ceramic surface charging (CSC) model into the e-beam trajectory simulation. The obtained e-beam characteristics with the CSC model have been compared with the experimental results, and we found that the proposed CSC model successfully led appropriate to calculation well matched with the experimental tendencies compared to the conventional model.
- KSP Keywords
- Accurate prediction, Charged particle, Charging model, Digital X-ray, E-Beam, Electron Beam, Optical simulation, Trajectory simulation, X-ray sources, beam characteristics, ceramic material