Four-sensitivity laser fusion shock wave speed measurement interferometer

Abstract

The invention discloses a four-sensitivity laser fusion shock wave speed measurement interferometer comprising an imaging module, a first image transmitting module and a second image transmitting module; the imaging module divides doppler signal reflected light reflected by a target surface into two beams, wherein one doppler signal reflected light beam forms two coherent light beams through the first image transmitting module and respectively form an image on a streak camera 1 slit, and the other doppler signal reflected light beam forms two coherent light beams through the second image transmitting module and respectively form an image on a streak camera 2 slit. The four-sensitivity laser fusion shock wave speed measurement interferometer is novel in structure, smart in concept, small in application difficulties, low in cost, and is reconstructed through existing equipment, thus greatly reducing real shock wave speed solving difficulty.

Description

technical field [0001] The invention belongs to the technical field of laser interference testing, in particular to a four-sensitivity laser fusion shock wave velocity measurement interferometer. Background technique [0002] Velocity Interferometer System for AnyReflector (VISAR for short) is a conventional equipment for measuring the velocity of shock waves in laser fusion shooting ranges. It is a device for difference-frequency interference velocity measurement based on the Doppler frequency shift effect. The variation history of the moving amount of the frequency interference fringe is used to calculate the variation history of the shock wave velocity. Since the shock wave speed can reach a very high speed (tens of km / s) in a very short time (several nanoseconds) after the first round of driving the laser, the Doppler frequency shift of the signal light is too severe to exceed the recording equipment The frequency response range of the recording device cannot respond, a...

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Problems solved by technology

[0004] However, with the improvement of the laser driving ability, the speed of the shock wave is too high. Although the theoretical prediction can give a certain speed range, there will often be multiple sets of overlapping solutions within the theoretically predicted speed range, and we cannot Judging which set of overlapping solutions is the real solution, therefore, the real shock wave velocity cannot be obtained in the end

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