ИСТИНА

Various mechanisms can be used for the generation of the collimated electron beams in relativistic femtosecond laser-plasma interactions. Such as Laser Wakefield Acceleration (LWFA), Direct Laser Acceleration (DLA), etc. Depending on the acceleration mechanism, gaseous, solid, film or other types of targets can be used. One of the most promising types of targets are liquid targets created with the help of a piezocapillary. Possessing solid-state electron density, they allow the generation of high charge electron beams. On the other hand, the self-regenerating surface of liquid targets and their high stability, allow operate at high repetition rates of laser pulses. In this work we present results of electron beam generation on several liquid targets: continuous jet and single drop modified by additional ns pulse on the µs time scale. The best parameters of the electron beam (divergence – 0.05rad, charge – 250pC for E>1MeV, energies – up to 15MeV) were obtained with a continuous jet 40µm thick.