ИСТИНА

We had shown experimentally that using an artificial prepulse with controlled parameters we can generate electron beam with a sufficiently small divergence (0.05rad for E>1 MeV), a charge of ~30 pC, and a temperature of ~2 MeV [1]. The charge was confirmed measuring neutron yield from Be(γ, n) photonuclear reaction with threshold of 1.7 MeV. We also found out that spatial alignment of two beams (main fs pulse and ns prepulse) is critical for obtaining such regime. This is due to the difference in preplasma profile, which is formed by ns prepulse. If these beams are aligned properly, electron beam exhibits great spatial and energy stability and is present for a wide range of other parameters (time delay between ns and fs pulses, angle of incidence onto the target, etc.) We also used this beam for nuclear physics studies (namely neutron and positron generation)