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Experiments on the formation of a high-pressure pulse in a solid under the action of a high-power (up to 3 TW/m2) pulsed (8 μs) flow of 0.8-MeV relativistic electrons and hot plasma have been performed. A technique for measuring a high pulsed pressure from the shift of the R1 (694.23-nm) and R2 (692.8-nm) ruby fluorescence lines has been developed. The minimum pressure that can be measured by the...