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首页> 外文期刊>Applied Surface Science >Polymers as fuel for laser-based microthrusters: An investigation of thrust, material, plasma and Shockwave properties
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Polymers as fuel for laser-based microthrusters: An investigation of thrust, material, plasma and Shockwave properties

机译：聚合物作为激光微推力器的燃料：对推力，材料，等离子体和冲击波特性的研究

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摘要

The micro-laser plasma thruster (μ-LPT) is a micropropulsion device, designed for steering and propelling of small satellites (1-10 kg). A laser is focused onto a polymer layer on a substrate to form a plasma, which produces the thrust that is used to control the satellite motion. Three different polymers were tested to understand the influence of their specific properties on the thrust performance: poly(vinyl chloride) (PVC) as a low-energetic material, a glycidyl azide polymer (GAP), and poly(vinyl nitrate) (PVN) as high-energetic polymers. Different absorbers (carbon nanoparticles or an IR dye) were added to the polymer to achieve absorption at the irradiation wavelength (1064 nm). The influence of the material and dopant properties on the decomposition characteristics and the energy release were investigated by thrust measurements and ns-shadowgraphy. Mass spectrometry and time- and space-resolved plasma emission spectroscopy in air and vacuum were used to analyze the degree of fragmentation as function of the material properties. The kinetic energies of selected fragments were calculated from the spectra. GAP + C showed the best performance in all measurements at high fluences, while at low fluences PVN + C revealed the best performance.
机译：微型激光等离子推进器（μ-LPT）是一种微型推进装置，设计用于操纵和推进小型卫星（1-10千克）。将激光聚焦到基板上的聚合物层上以形成等离子体，该等离子体产生用于控制卫星运动的推力。测试了三种不同的聚合物以了解其特定性能对推力性能的影响：作为低能材料的聚氯乙烯（PVC），缩水甘油叠氮聚合物（GAP）和聚硝酸乙烯酯（PVN）作为高能聚合物。将不同的吸收剂（碳纳米颗粒或IR染料）添加到聚合物中，以实现在辐射波长（1064 nm）处的吸收。通过推力测量和ns阴影图研究了材料和掺杂剂性质对分解特性和能量释放的影响。使用质谱和在空气和真空中的时间分辨和空间分辨等离子体发射光谱分析了碎裂程度与材料性能的关系。从谱图计算出选定片段的动能。在高通量下，GAP + C在所有测量中显示出最佳性能，而在低通量下，PVN + C显示出最佳性能。

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