Possibility of Observing Radiation Effects in the Interaction of Ultrahigh-Power Laser Radiation of a Magnetic Dipole Configuration with Plasma

The article deals with the problem of taking into account radiation losses in the description of the dynamics of a charged particle in electromagnetic fields. The solution of this fundamental problem is becoming more and more in demand due to the development of ultrahigh-power lasers. Since the generation of radiation by a charged particle depends both on the magnitude of the fields in which it moves and on their structure, the developed multipetawatt multibeam laser systems, such as XCELS, can open up unique ways to solve this problem. This paper proposes one of such ways based on using a magnetic dipole field configuration formed by several laser pulses. We show by means of numerical simulations that when a solid target in the form of a nanowire is irradiated with several petawatt laser pulses that maximize the magnetic field in focus, there may appear an anomalous radiative trapping regime. The formed distributions of accelerated electrons and generated gamma photons in this regime have distinctive properties on the basis of which it is possible to experimentally determine the applicability of various theoretical approaches to the description of radiation losses.