Simulation studies of the behavior of positrons in a microtrap with long aspect ratio Alireza Narimannezhad, Christopher J. Baker, Marc H. Weber, Joshah Jennings and Kelvin G. Lynn Eur. Phys. J. D, 68 11 (2014) 351 Published online: 21 November 2014 DOI: 10.1140/epjd/e2014-40700-0