Study of highly magnetized relativistic plasma in the context of laboratory astrophysics and particle flow control

One of the most efficient methods of laser generation of highly magnetized hot plasma under the use of superhigh-power irradiation achievable at the advanced XCELS facility is considered. It is shown that the use of several pulses in the setup makes it possible to control the plasma parameters, while the energy efficiency, i.e., the ratio of the magnetic field energy to the total laser radiation energy, turns out to be ∼20%. The resulting system with relativistic magnetized electrons and magnetic fields up to several tens of kT is of interest for laboratory studies of high-energy processes in astrophysics. In particular, the phenomenon of relativistic reconnection of magnetic field lines, as well as for various promising applications, for example, for the control of the flows of fast laser-accelerated particles.