FORMATION OF HIGH-CURRENT AND DENSITY ELECTRON BEAM ON GALLIUM CATHODE WITH THE LIMITED EMISSION SURFACE G.N. Fursey, V.M. Zhukov, L.A. Shirochin, A.F. Aleksandrov and S.Y. Galuso J. Phys. Colloques, 40 C7 (1979) C7-415-C7-416 DOI: 10.1051/jphyscol:19797203