[IEEE 2012 XXVth International Symposium on Discharges and Electrical Insulation in Vacuum (ISDEIV 2012) - Tomsk, Russia (2012.09.2-2012.09.7)] 2012 25th International Symposium on Discharges and Electrical Insulation in Vacuum (ISDEIV) - Low-energy, high-current electron beams for material surface treatment