Target stand device for laser-driven micro-debris experiments

Abstract

The invention discloses a target holder device for a test of laser driving tiny fragments. The target holder device comprises a laser device, a beam splitter, a beam expander, a focusing lens, a flying piece target, an impact target and a velocity measuring system, wherein the beam splitter, the beam expander, the focusing lens, the flying piece target, the impact target and the velocity measuring system are arranged in a vacuum tank; the focusing lens, the flying piece target and the impact target are coupled into a target holder at the lower part, and an external controller is connected with a stepping motor through a cable so as to precisely control the positions of the focusing lens, the flying piece target and the impact target on the target holder. Laser needs passes through the beam splitter before penetrating through the focusing lens to enter the flying piece target, the beam splitter reflects one part of laser into a CCD (Charge Coupled Device) so as to observe laser spots, the laser is incident to the flying piece target after passing through the beam splitter, the flying piece target generates plasmas under the action of laser and drives launch of flying pieces. Compared with the prior art, the target holder device can electrically regulate the position of the focusing lens, can conveniently move the flying piece target and the impact target, and improves the precise of an impact position; in a cumulative impact test, the condition that the flying piece target and the impact target are adjusted by opening the tank can be avoided, so that the time is greatly saved.

Description

technical field [0001] The invention belongs to the field of spacecraft space debris protection, and in particular relates to a test device for the impact of micron-scale space debris. Background technique [0002] Laser-driven flyer technology is to irradiate a solid film layer (flyer target) with a pulsed high-power laser, ablate a part of the film layer, and generate high-temperature and high-pressure plasma, and use the high pressure of the plasma to drive the remaining film layer (flyer) at high speed. Flying to simulate micron-scale space debris. The technical device is simple and low in cost, and has great advantages in engineering. [0003] The existing laser-driven flyer device includes a laser, a beam splitter, a beam expander, a focusing lens, a flyer target and a velocity measuring system. Among them, the positions of the focusing lens, the flyer target and the impact target are all manually adjusted, the spot size is difficult to adjust accurately, and it cann...

AI Technical Summary

Problems solved by technology

Among them, the positions of the focusing lens, the flyer target and the impact target are all manually adjusted, the spot size is difficult to adjust accurately, and it cannot be monitored in real time, and the impact position accuracy is low; especially under vacuum conditions, the vacuum needs to be turned on every time a test is completed Can adjust the position of the flyer target and the impact target, and then re-evacuate, which is a waste of time, and the test method needs to be optimized urgently

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