摘要
发散场离子推力器挡板通道结构对放电室性能至关重要,通道尺寸严重影响进入放电室的原初电子能量和速度分布,进而影响放电室性能。根据挡板通道区域等离子体物理过程,建立了与离子推力器工作宏观物理量相关的挡板通道设计模型。利用模型计算了10 cm离子推力器挡板通道几何参数,在计算的理论值附近设计了三种不同特征尺寸的挡板结构,并通过试验开展了特征尺寸的优化。最终优化的挡板通道结构应用于10 cm离子推力器原理样机,该原理样机的性能摸底试验表明其放电室性能满足设计指标要求,从而验证了10 cm离子推力器挡板通道设计模型的合理性。
Baffle aperture architecture is a vital factor for ion thruster which uses the divergence magnetic field topology.And the energy and velocity distribution of primary electron injected into discharge chamber are heavily influenced by the aperture size,and then the performance of discharge chamber is affected. According to the plasma characteristic in the baffle aperture,this paper establishes a calculation model of baffle aperture geometry design which relies on ion thruster discharge parameter. Using this model a geometric value of baffle aperture is calculated in 10 cm ion thruster,and three different feature sizes are designed near this calculated value,and the feature sizes are also optimized by the tests. Ultimately,the optimized baffle aperture size is applied in 10 cm prototype ion thruster. The test result shows that the performance of the ion thruster satisfies the design requirements,and also verifies the rationality of the baffle aperture design model in 10 cm ion thruster.
出处
《真空与低温》
2015年第6期326-329,共4页
Vacuum and Cryogenics
基金
国防重点实验室金项目(9140C550206130C55003)
