Confinement of the charged microparticles by alternating electric fields in a gas flow D. S. Lapitsky, V. S. Filinov, L. M. Vasilyak, R. A. Syrovatka, L. V. Deputatova, V. I. Vladimirov and V. Ya. Pecherkin EPL, 110 1 (2015) 15001 Published online: 15 April 2015 DOI: 10.1209/0295-5075/110/15001