Test target and test method for testing targeting precision of laser device

Abstract

The invention relates to a test target and a test method for testing targeting precision of a laser device and belongs to the technology field of laser inertia confinement fusion. The test target includes a target surface, and the target surface includes gold foil layers and a hydrocarbon film layer. A total of two gold foil layers are arranged, the hydrocarbon film layer is located between the two gold foil layers, and laser beams emitted by the laser device are simultaneously incident on surfaces of the gold foil layers in a symmetrical manner. Each gold foil layer is provided with a plurality of first grooves and a plurality of second grooves, the first groove and the second groove are arranged in an intersected manner to form a plurality of intersecting points as target holes, groove depth of each of the first grooves and the second grooves is as much as thickness of the gold foil layer. In the test target, a planar target structure in which one gold foil layer, the hydrocarbon film layer and the other gold foil layer are stacked layer by layer. Each laser beam can hit front and back surfaces of the test target at the same time, shooting accuracy of many laser beams can be tested in one test, time need for shooting accuracy testing can be reduced, and shooting accuracy test efficiency can be improved.

Description

Technical field [0001] The invention belongs to the technical field of laser inertial confinement fusion, and specifically relates to a test target and a test method for testing the accuracy of laser device shooting. Background technique [0002] In inertial confinement fusion, it is not only necessary to heat the fuel to a very high thermonuclear reaction temperature, but also to confine high-temperature plasma within the fusion reaction time. Laser-driven inertial confinement fusion relies on the centripetal explosion of the target pellet Compression increases the density of the fuel and confines the high-temperature plasma. The so-called centripetal implosion means that when multiple laser beams are irradiated symmetrically to the surface of a spherically symmetrical target pellet at the same time, the ablation layer absorbs the laser energy and forms plasma around the target pellet. The plasma is scattered around the target pellet and generates a reaction force. The spherica...

AI Technical Summary

Problems solved by technology

If it is necessary to test the targeting accuracy of many beams of lasers, multiple experiments are required. For example, 6 experiments are required for testing 48 laser beams. In order to improve the accuracy of the targeting accuracy test, each experiment needs to be repeated at least three times. Above, even if the accuracy test of 48 laser beams is completed with an eight-hole target or a nine-hole target, 18 experiments are required, which greatly increases the test time for the accuracy of the target.

At the same time, different batches of tests will cause deviations in the test results. This deviation is brought about by the test itself, mainly in the process of target making. It cannot guarantee the complete consistency of the test conditions. Even if the two parameters are the same, However, due to the uncertainty of the test itself, there will also be errors

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