Numerical and experimantal investigations of relativistic electron beam concentration in convergent lines

Results are presented of numerical calculations of lines with magnetic self-insulation as well as model experiments on energy transport and coordination of convergent lines, designated for concentrating the energy flux of powerful relativistic electron beams. Calculations were made for coaxial cylindrical and conical lines, to central electrodes of which voltage was applied. Calculations and experimental data suggest that insulation conditions with high efficiency of transportation are possible for moderately convergent lines. Investigations into plasma containment in the line interelectrode gap and formation of low-impedance diode an the end of the line have shown that, during a pulse, plasma doesn't fill the line and at the same time its occurrence in the diode sharply redUces its impedance (1 Ohm). The obtained impendance is sUfficient for line matching under operation conditions of the ''Angara-5'' facility