T. ABDULLA, Roaa. Comparative Study on Electron Beam Characteristics of a Thermionic Electron Gun for Different Shapes of Wehnelt Cup. Al-Nahrain Journal of Science, [S. l.], v. 29, n. 1, p. 90–97, 2026. DOI: 10.22401/ANJS.29.1.09. Disponível em: https://anjs.edu.iq/index.php/anjs/article/view/3087. Acesso em: 17 oct. 2026.