“Study the Effective Length of Quadrupole Magnet on Some Parameters of Ion Optical System from Plasma Source”, Euro.J.Ph.Ch.Ma., vol. 23, pp. 27–32, Oct. 2023, Accessed: Jun. 18, 2026. [Online]. Available: https://mail.geniusjournals.org/index.php/ejpcm/article/view/5054