Superhigh dust charging by high-voltage electron beam V. E. Fortov, A. V. Gavrikov, O. F. Petrov, V. S. Sidorov, M. N. Vasiliev and N. A. Vorona EPL, 94 5 (2011) 55001 Published online: 05 May 2011 DOI: 10.1209/0295-5075/94/55001