电磁监测试验卫星阻滞势分析器探测技术  

Research on retarding potential analyzer aboard China seismo-electromagnetic satellite

作　　者：郑香脂[1,2,3] 张爱兵[1,2] 关燚炳[1,2] 刘超[1,2] 王文静[1,2] 田峥[1,2] 孔令高[1,2] 孙越强[1,2] 

机构地区：[1]中国科学院国家空间科学中心,北京100190 [2]天基空间环境探测北京市重点实验室,北京100190 [3]中国科学院大学,北京100190

出　　处：《物理学报》2017年第7期406-415,共10页Acta Physica Sinica

基　　金：国家科技重大专项(批准号:Y26604AG90)资助的课题~~

摘　　要：依据电磁监测试验卫星的任务要求,自主研发了等离子体分析仪,首次实现电离层等离子体原位探测.作为等离子体分析仪的重要组成部分,阻滞势分析器主要用于探测电离层等离子体的密度、沿轨道方向漂移速度、温度以及成分等参数.阻滞势分析器传感器栅网材料选用铍铜,表面镀金处理,并通过仿真验证了多层栅网总透过率与理论计算的一致性.依据技术指标,详细设计了阻滞势分析器传感器的窗口半径、收集极半径、有效高度及扫描电压等参数.在电子学电路设计时通过前放电路三个可调量程的设计,保证了电路测量精度.在此基础上,借助意大利国家天体物理研究院行星际物理研究所的地面等离子体环境,完成了阻滞势分析器的等离子体环境测试.测试结果表明,该阻滞势分析器的性能指标满足设计要求,能够实现电磁监测试验卫星的任务需求.China seismoelectromagnetic satellite（CSES） is the first space-based platform of three-dimensional earthquake monitoring system in china. Plasma analyzing package（PAP） is one of scientific payloads aboard on CSES, which is the first application to the field of Chinese satellite. The main scientific objective of PAP is to measure ion density, ion temperature, ion composition and ion drift velocities（parallel and perpendicular to the direction of the satellite flight on orbit）, and ion density fluctuation in the ionosphere. The PAP payload is composed of four parts, including retarding potential analyzer（RPA）, ion drift meter, ion capture meter, and metal plate. The RPA is used to test ion density, ion temperature, ion composition and ion drift velocity（parallel to the direction of the satellite flight on orbit）.The detailed design process of the sensor of RPA is described in this paper. The grid of RPA sensor is made of Beryllium copper, plated with gold to ensure uniform surface work function, and to prevent space atomic oxygen from eroding. The design value of the transmission rate of grid is 82.64% ± 1.4%, with taking into account the Debye length on the orbit of satellite. And the total transmission rate of multilayer grid for RPA is verified by SIMON simulation experiment. To ensure the accuracy of RPA, the radii of sensor window and sensor collector are designed to be 20 mm and 50 mm respectively, and the height of sensor is 20 mm. The sweeping voltage ranges from-2 V to 20 V. And the step of sweeping voltage is adjustable between 0.056 and. 179 V.In this paper electronic design of RPA is also discussed. The electronic box is composed of preamplifier circuit,digital logical circuit, satellite interface circuit, etc. The sweeping voltage and the signal acquisition are controlled by field-programmable gate array. The design of three measurement ranges in digital logical circuit improves RPA measurement accuracy, which is better than 1.3% in the full range.In addition, the method of testing

关 键 词：等离子体分析仪 阻滞势分析器 电磁监测试验卫星 离子密度 电离层扰动 

分 类 号：P315.7[天文地球—地震学]