Effect of beam parameters on the space charge wave modes in slow wave structures with semi-circular and trapezoidal corrugationRakibul Hasan Sagor, Md. Ghulam Saber and Md. Ruhul AminEur. Phys. J. Appl. Phys., 71 3 (2015) 30801DOI: https://doi.org/10.1051/epjap/2015150208