High-current electron beam transport and acceleration in LIA-30

LIA-30, being 25 meters long, has the following parameters: electron energy ≤ 40 MeV, current 100 kA, pulse duration 30 ns. An annular electron beam is created in and transported along the vacuum channel by a longitudinal guiding magnetic field of 0.5 T. In the course of the experiment many parameters were being varied, namely: cathode diameter (10–25 cm), diode geometry, injection energy (2.5–7 MeV), amplitude (50–170 kA), pulse form and duration of the injected current. The temporal program of the accelerating module switchings was changed as well. The peculiarities of high-current beam propagation in the extended accelerator channel of LIA-30 are considered.