T. Abdulla R. Comparative Study on Electron Beam Characteristics of a Thermionic Electron Gun for Different Shapes of Wehnelt Cup. Al-Nahrain J. Sci. [Internet]. 2026 Mar. 16 [cited 2026 May 22];29(1):90-7. Available from: https://mail.anjs.edu.iq/index.php/anjs/article/view/3087