Myasnikov, M.D'yachkov, L.Petrov, O.Hyde, Truell Wayne.Kong, JieMatthews, Lorin Swint.2015-06-152015-06-152014-09-08Physics of Plasmas, 21(9), 093702, 2014.http://hdl.handle.net/2104/9398We consider the shell structure of Coulomb clusters in an axially symmetric parabolic trap exhibiting a confining potential U_c(ρ,z)=(mω^2/2)(ρ^2+αz^2) . Assuming an anisotropic parameter α = 4 (corresponding to experiments employing a cusp magnetic trap under microgravity conditions), we have calculated cluster configurations for particle numbers N = 3 to 30. We have shown that clusters with N ≤ 12 initially remain flat, transitioning to three-dimensional configurations as N increases. For N = 8, we have calculated the configurations of minimal potential energy for all values of α and found the points of configuration transitions. For N = 13 and 23, we discuss the influence of both the shielding and anisotropic parameter on potential energy, cluster size, and shell structure.enArticle10.1063/1.4885637