We proposed to use multipetawatt multibeam systems that reproduce a dipole wave of the electric configuration to maximise the electric field in the interaction region and the energy of accelerated particles. The breakdown of vacuum in fields of this configuration leads to the formation of beams of electrons and positrons accelerated to several GeV. It is shown that when use is made of 12 laser pulses with a duration of 30 fs and a total power of 36 PW, the total charge of accelerated electrons (positrons) can reach 250-270 nC, and the charge of particles with energies above 1 GeV can exceed 1 nC. It is demonstrated that the electric dipole structure of the fields makes it possible to obtain an extremely narrow (several mrad) distribution of particles over the polar angle measured from the field symmetry axis. It is also shown that the distribution of particles over the azimuthal angle can be used to diagnose interaction regimes during vacuum breakdown. The obtained results can be useful in preparing experiments on the promising XCELS laser system.
Формирование пучков заряженных частиц в многопучковых системах электродипольной конфигурации мультипетаваттного уровня мощности / А. В. Башинов, Е. С. Ефименко, А. А. Муравьев, В. Д. Волокитин, Е. А. Панова, И. Б. Мееров, А.М. Сергеев, А. В. Ким ; Федеральный исследовательский центр Институт прикладной физики им. А. В. Гапонова-Грехова РАН, Национальный исследовательский Нижегородский государственный университет им. Н. И. Лобачевского // Квантовая электроника. - 2023. - Т. 53, N 2. - С. 150-156.
We consider the problem of taking into account radiation losses in describing 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 ultra-high-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. In the present work, one of such ways is proposed, based on the use of a magnetic dipole field configuration formed by several laser pulses. Using numerical simulations, we show that when a solid target in the form of a nanowire is irradiated with several petawatt laser pulses that maximise the magnetic field at the focus, there appears an anomalous radiative capture regime. The generated distributions of accelerated electrons and generated gamma photons in this regimes 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.
О возможности наблюдения радиационных эффектов при взаимодействии сверхмощного лазерного излучения магнитодипольной конфигурации с плазмой / А. В. Башинов, Е. С. Ефименко, А. А. Муравьев, В. Д. Волокитин, Е. А. Панова, И. Б. Мееров, А. М. Сергеев, А. В. Ким ;Федеральный исследовательский центр Институт прикладной физики им. А. В. Гапонова-Грехова РАН, Национальный исследовательский Нижегородский государственный университет им. Н.И. Лобачевского // Квантовая электроника. - 2023, Т. 53, N 2. - С. 136-144.