Abstract
The possibility of developing an ultra-high-brightness photon source with energies up to several GeV based on promising multipetawatt multibeam laser systems have been studied. For a maximum photon energy to be reached and for a directed photon beam to be generated, it is proposed to use an electric dipole field structure as the main configuration, which maximizes the amplitude of the electric field in the focus region. Dependences of the characteristics of the generated gamma radiation on the number of laser beams irradiating the plasma target and their focusing are investigated. It is shown that for the laser system parameters close to the stated XCELS facility parameters and a total power of 36 PW, the maximum energy of gamma photons can reach 2 GeV, the efficiency of conversion of laser radiation into photons with an energy of more than 1 MeV is 40%, and the flux of photons with an energy above 1 GeV may approach 1025 s–1. The radiation pattern of gamma radiation can be only a few mrad wide and carries information about various regimes of plasma-field dynamics in the focal region. The study thus performed has shown that multibeam multipetawatt laser systems, such as XCELS, can become the basis for constructing an ultra-high-brightness source of gamma radiation.
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Funding
The work was partially supported by the Ministry of Science and Higher Education of the Russian Federation (agreement no. 075-15-2021-1361). Numerical simulation was done using computing resources of the Interdepartmental Supercomputer Center of the Russian Academy of Sciences and computing resources of the supercomputer of the State University of Nizhny Novgorod.
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Translated by D. Sventsitsky
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Efimenko, E.S., Bashinov, A.V., Muraviev, A.A. et al. The Source of Gamma Photons in Multipetawatt Multibeam Systems of Electric Dipole Configuration. Bull. Lebedev Phys. Inst. 50 (Suppl 6), S671–S679 (2023). https://doi.org/10.3103/S1068335623180069
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DOI: https://doi.org/10.3103/S1068335623180069