Design of achromatic combined quadrupole lens using the modified bell-shaped field distribution model
By: Husayn, Adi Ali; Jafar, Fatimah Nafi; Ubayd, Sura Allawi. Iraqi Journal of Physics. Vol. 9, no. 16 (2011), pp.66-72, 7 p.
Subjects: Electron optics; Lenses