Laser ablation of energetic polymer solutions: effect of viscosity and fluence on the splashing behavior
Laser ablation of energetic polymer solutions: effect of viscosity and fluence on the splashing behavior
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DOI：
10.1007/s00339-008-4896-1
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发表时间：
2009-03
期刊：
影响因子：
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通讯作者：
R. Fardel;L. Urech;T. Lippert;C. Phipps;J. Fitz-Gerald;A. Wokaun
中科院分区：
文献类型：
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作者：
R. Fardel;L. Urech;T. Lippert;C. Phipps;J. Fitz-Gerald;A. Wokaun
激光等离子体推力器是一种利用激光烧蚀靶板产生推力的新型小卫星推进系统。液体聚合物溶液是非常有前途的燃料，为这样的系统，只要不发生飞溅的目标，因为喷射液滴强烈降低系统的性能。我们研究了纳秒红外激光烧蚀含碳纳米颗粒吸收剂的叠氮缩水甘油醚聚合物溶液。阴影成像显示两种情况下，即飞溅政权和固体样行为。这两种制度之间的过渡取决于溶液的粘度和激光能量密度，并解释了作用在目标上的反冲力。确定了避免飞溅的适当条件，表明这种液体聚合物溶液是激光等离子体推力器的合适燃料。
Laser plasma thrusters are a new kind of propulsion system for small satellites, and work with the thrust created by the laser ablation of a target. Liquid polymer solutions are very promising fuels for such systems, provided that no splashing of the target occurs, because ejection of droplets strongly decreases the performances of the system. We have investigated the nanosecond infrared laser ablation of glycidyl azide polymer solutions containing carbon nanoparticles as absorber. Shadowgraphy imaging revealed two cases, namely splashing regime and solid-like behavior. The transition between both regimes depends on the viscosity of the solution and on the laser fluence, and is explained by the recoil force acting on the target. Appropriate conditions to avoid splashing were identified, showing that this liquid polymer solution is a suitable fuel for laser plasma thrusters.