%0 Conference Paper %B Proceedings of the 9th International Conference on Electron Beam Technologies %D 2009 %T Quality Characterization of Electron Beams %A Elena Koleva %A Georgy Mladenov %A K. Garkova %A M. Kardjiev %E Georgy Mladenov %C Varna %I Bulgarian Academy of Sciencies %P 64–69