摘要
为实现均匀辐照,ICF靶的无接触支撑是关键。提出用近场声悬浮对ICF靶进行无接触支撑,对悬浮ICF靶丸类微球的压电换能器和悬浮系统进行了初步设计,换能器发射端采用了凹球面结构,利用ANSYS软件对发射端的凹球面结构进行了优化。并构建了近场声悬浮测试系统,对不同直径的钢球在不同工作电压下进行了悬浮实验。实验结果表明:当发射端凹球面直径与钢球直径接近或相等时,悬浮效果是最好的,并且用气动的方式可以实现悬浮钢球的非接触驱动。当工作电压为600 V时,钢球的悬浮高度为50μm,扰动振幅为3μm,这说明ICF靶近场声悬浮是可行的。
For uniform irradiation in ICF, a non-contact target is the key technology. Here, the method that ICF target is levitated with a near-field acoustic levitation system was presented. The transducer and the levitation system for ICF target were preliminarity designed. The radiating surface of the transducer was a concave spherical optimized with ANSYS software. The near-field acoustic levitation system was built and different ICF target-like spheres were levitated under different voltages. It was shown that when the diameters of the concave sphere surface and the ICF target-like sphere are similar or the same, the levitating effect is the best; airflow can be used to drive the levitated spheres rotating in a manner of non-contact ; the sphere levitating height is 50 μm and its vibrating amplitude is 3 μm when the driving voltage is 600V; it is feasible for ICF target to be levitated with a near-field acoustic levitation system.
出处
《振动与冲击》
EI
CSCD
北大核心
2013年第20期156-160,共5页
Journal of Vibration and Shock
基金
国家自然科学基金资助项目(51075181)
关键词
ICF靶
近场声悬浮
凹球面发射端
ICF target
near-field acoustic levitation
concave spherical radiating surface
