“The Space-Charge Effect on Theoretical Design of the Electron Gun Operated under Finite Magnification Condition”, IHJPAS, vol. 20, no. 1, pp. 1–11, Aug. 2017, Accessed: May 19, 2024. [Online]. Available: https://jih.uobaghdad.edu.iq/index.php/j/article/view/1303