Experimental research on impulse coupling effect of a multi-pulse laser on an aluminum target
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摘要:
Impact and torsion pendulums are applied in impulse coupling experiments of high-energy laser irradiation of space debris.It is difficult to achieve a multi-pulse experiment and thus hard to analyze the multi-pulse impulse coupling effect.Here,we designed a new recoil impulse experimental measurement system of non-contact,multidegrees of freedom,and multi-pulse irradiation.The system used a low-pressure and low-temperature vacuum chamber to simulate the space environment,the pinning effect of magnetic levitation to achieve aluminum target suspension,and high-speed cameras to record the displacement over time to calculate the impulse of the target.Then the impulse coupling experiment of multi-pulse laser irradiation on the aluminum target was performed.The result shows that the multi-pulse impulse coupling effect is not the linear accumulation of coupling results by every single-pulse and multi-pulse coefficient that decreases with the increase of the number of pulses,and eventually stabilizes as the decrease gets smaller.