Limitations on electron thermal conductivity of a laser plasma in experiments carried out using the Progress facility

An investigation was made of the limitation coefficient f of the electron thermal conductivity of a laser plasma formed as a result of spherical irradiation of a target using the 6-beam Progress laser facility (λ = 1.054 μm) at heating radiation power densities of q ~ (0.5–5) X 10¹⁵ W/cm². The value of f was determined by comparing the results of measurements of the energy absorbed by the target, the average target compression rate, and the yield of x-ray lines of multiply charged Si ions with the results of numerical calculations carried out using the Zarya program in a wide range of f. It was found that f decreased on increase in q.