Generation of high-power light pulses at wavelengths 1.06 and 0.53 μ and their application in plasma heating. I. Experimental investigations of reflection of light of two wavelengths in laser heating of plasma

The results are given of calorimetric, time, spectral, and polarization measurements of radiation reflected back from a plasma heated by nanosecond laser pulses of λ = 1.06 and 0.53 μ at power densities exceeding 10¹⁴ W/cm² at the target surface. It is shown that the absorption of the λ = 0.53 μ radiation by a plasma is three times as strong as the absorption of the λ = 1.06 μ radiation.