@ARTICLE{Sharifzade, author = {sharifzade, azade and mirzanejad, saeed and ghadi, and sohbatzade, farshad and }, title = {Numerical investigation of electron beam focus by extracting electrodes in hollow cathode source }, volume = {23}, number = {0}, abstract ={In this paper, resolution Poisson's equation is investigated in cylindrical coordinates of the electrostatic field lines in a hollow cathode electron source. The anode outlet is optimized by changing the structure of the anode electrode and the potential dynamics of the electron beam on. The investigated parameters in the electron source are the focus of the Andes, the divergence angle of the electron beam spot and the diameter of the electron source }, URL = {http://opsi.ir/article-1-1404-en.html}, eprint = {http://opsi.ir/article-1-1404-en.pdf}, journal = {Accepted and Presented Articles of OPSI Conferences}, doi = {}, year = {2017} }