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首页> 外文会议>High-Power Laser Ablation VI pt.1 >Polymers as Fuel for Laser Plasma Thrusters A correlation of thrust with material and plasma properties by mass spectrometry
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Polymers as Fuel for Laser Plasma Thrusters A correlation of thrust with material and plasma properties by mass spectrometry

机译：聚合物作为激光等离子推进器的燃料通过质谱分析推力与材料和等离子特性的相关性

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摘要

The micro laser plasma thruster (μLPT) is a micro propulsion device, designed for the steering and propelling of small satellites (1 to 10 kg). A laser is focused onto a polymer layer on a substrate to form a plasma. The thrust produced by this plasma is used to control the satellite motion. To understand the influence of the specific properties of the polymers, three different "high"- and "low"-energetic polymers were tested: poly(vinyl chloride) (PVC) as a low-energetic reference polymer that showed the best properties among commercial polymers, a glycidyl azide polymer (GAP), and poly(vinyl nitrate) (PVN) as high-energetic polymers. It was necessary to dope the polymers with carbon nanoparticles or an IR-dye to achieve absorption at the irradiation wavelength in the near IR. Decomposition into smaller fragmentation was measured for the energetic polymers than for PVC corresponding well to the higher momentum coupling coefficient of the energetic polymers, which indicates that more thrust can be gained from a chosen incident laser power. The measurements of the kinetic energies of selected decomposition fragments revealed no significant difference between the different carbon doped polymers. Only for GAP with the IR-dye a change in the ratio between ions with different kinetic energy was observed with increasing fluence. More C~+ ions with higher kinetic energy were detected at higher fluences. No correlation between the kinetic energies of the ablation products and the specific impulse could be established for the obtained data.
机译：微型激光等离子推进器（μLPT）是一种微型推进装置，设计用于操纵和推进小型卫星（1至10千克）。将激光聚焦到衬底上的聚合物层上以形成等离子体。该等离子体产生的推力用于控制卫星运动。为了了解聚合物特定性能的影响，测试了三种不同的“高”和“低”高能聚合物：聚氯乙烯（PVC）作为低能参考聚合物，在商业上表现出最佳性能聚合物，缩水甘油叠氮化物聚合物（GAP）和聚硝酸乙烯酯（PVN）作为高能聚合物。必须在聚合物中掺入碳纳米颗粒或IR染料，以在近IR中的辐射波长处实现吸收。与聚氯乙烯相比，高能聚合物的分解为更小的碎片，这与高能聚合物的较高动量耦合系数相当，这表明可以从选定的入射激光功率中获得更大的推力。所选分解片段的动能的测量结果表明，不同的碳掺杂聚合物之间没有显着差异。仅对于具有IR染料的GAP，观察到具有不同动能的离子之间的比率随通量的增加而变化。在较高的通量下检测到更多的具有更高动能的C〜+离子。对于所获得的数据，不能建立消融产物的动能与比冲之间的相关性。

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