CAJ | 학술논문

激光微烧蚀靶材产生的力学性能是表征激光微推进性能的重要指标,相关研究一直是激光微推进领域内讨论的热点。掺碳是一种提高激光与靶材耦合性能的重要手段,能够一定程度上改善激光微推进性能,不同掺杂程度所获得的推进性能也不同。采用单脉冲输出功率较低的半导体激光器和功率较高的YAG激光器,分别测量了不同功率密度和能量注入情况下,微烧蚀掺碳PVC材料所产生的推进性能,对比分析了不同激光功率密度和靶材掺碳质量分数条件下,冲量耦合系数、比冲和能量转化效率的变化规律。
격광미소식파재산생적역학성능시표정격광미추진성능적중요지표,상관연구일직시격광미추진영역내토론적열점。참탄시일충제고격광여파재우합성능적중요수단,능구일정정도상개선격광미추진성능,불동참잡정도소획득적추진성능야불동。채용단맥충수출공솔교저적반도체격광기화공솔교고적YAG격광기,분별측량료불동공솔밀도화능량주입정황하,미소식참탄PVC재료소산생적추진성능,대비분석료불동격광공솔밀도화파재참탄질량분수조건하,충량우합계수、비충화능량전화효솔적변화규률。
The thrust performance of the laser micro ablation is the main important index for the laser micro propulsion.Carbon dopant could be a kind of important methods for improvement of coupling of the laser and target.Diode laser with lower power and YAG laser with higher power are adopted to ablate the doped PVC.Torsion pendulum with laser interferometry is applied to measure micro impulse,and analytical balance for measurement of micro ablated mass is used.The propulsion parameters of PVC doped with different fractions of carbon ablated by diode and YAG laser are measured.The influences of different fractions of carbon and laser power intensity to impulse coupling coefficient,specific impulse and efficiency are analyzed.