Simulations of single charged particle motion in external magnetic and electric fields D. Eržen, J. P. Verboncoeur, J. Duhovnik and N. Jelić Eur. Phys. J. D, 54 2 (2009) 409-415 Published online: 13 March 2009 DOI: 10.1140/epjd/e2009-00075-y