1 Department of Oriental Biomedical Engineering, Sangji University, Wonju 26339, Korea
2 XL Co. Ltd., Wonju 26311, Korea
Correspondence to: firstname.lastname@example.org
Received August 4, 2016; Revised August 10, 2016; Accepted August 10, 2016.
This is an open-access article distributed under the terms of the Creative Commons Attribution Non-Commercial License (http://creativecommons.org/licenses/by-nc/3.0/) which permits unrestricted non-commercial use, distribution, and reproduction in any medium, provided the original work is properly cited.
The size of a focused spot depending on the cathode shield for a portable and high-output X-ray tube were simulated by using the OPERA-3D SW program. Parameters, such as the voltage, the temperature, and the work function of thermal electrons applied to the filament as a cathode and to the target as an anode, were optimized, and the performance of the X-ray focusing tube was determined. The orbits of the electrons in the thermal electron beam emitted from the filament of the X-ray tube were simulated by using the finite element method for the anode, cathode cup, and shield plate. Through an analysis of the distribution of the electron-beam density with and without a cathode shield plate, the average magnitudes of the lengths and widths spots symmetrically focused were found to be 4.5 mm and 1.5 mm, respectively.
PACS numbers: 41.50.+h, 87.56.N-, 47.11.Fg
Keywords: Focusing tube, Cathode cup, Shield plate, Heat analysis, Distribution of electron beam density