无中和器射频离子推力器原理研究

在电推力器的广泛应用中，大部分都采用加速正离子的方式产生推力，且需要安装中和器发射电子对喷射出的正离子进行中和，否则会导致航天器自充电，对其通信及电子器件造成损害。因此，中和器的性能成为制约电推力器工作状态和寿命的重要因素。为了克服该缺点，介绍了一种基于同时加速正、负离子的无中和器射频离子推力器，阐述了其结构组成及推进原理，分析了离子-离子的产生、正负离子的加速过程，指出了关键技术包括电负性工质气体放电特性、磁场过滤电子束缚效能，以及可周期性交替加速正、负离子的栅极偏置电压加载方式。分析表明，该推力器在低轨航天器及深空探测器中具有潜在的应用前景。

Research on the principle of RF ion thruster without a neutralizer

In the wide application of electric thrusters, most of them accelerate positive ions to generate thrust, and need to install the neutralizer which can emit electrons to neutralize the positive ions. Otherwise it will cause the spacecraft self-charging, and the communication equipment and electronic devices will be damaged. Therefore, the neutralizer performance becomes an important factor restricting the working state of the electric thrusters. In order to overcome the shortcoming, a kind of RF ion thruster without a neutralizer based on accelerating positive and negative ions alternately was introduced. The structural components and the propulsion principles were described. The generation of ion-ions and accelerating process of positive and negative ions were discussed. The key techniques including electronegative gas discharge characteristics and magnetic field filter the electrons efficiency, as well as the applied bias voltage way for grids in which the positive and negative ions could be accelerated alternately and periodically were pointed. The analysis results indicate this thruster has potential application prospect in the low orbit spacecraft and deep space probes.