A low-energy ion spectrometer with half-space entrance for three-axis stabilized spacecraft

A low-energy ion spectrometer(LEIS) for use aboard three-axis stabilized spacecraft has been developed to measure ion energy per charge distribution in three-dimensional space with good energy-, angular-and temporal-resolutions. For the standard top-hat electrostatic analyzer used widely in space plasma detection, three-axis stabilized spacecraft makes it difficult to obtain complete coverage of all possible ion arrival directions. We have designed angular scanning deflectors supplementing to a cylindrically symmetric top-hat electrostatic analyzer to provide a half-space field of view as 360°×90°(–45°–+45°), and fabricated the LEIS flight model for detecting magnetospheric ions in geosynchronous orbit. The performance of this payload has been evaluated in detail by a series of simulation and environmental tests, and the payload has also been calibrated through laboratory experiments using a low-energy ion source. The results show that capabilities of the LEIS payload are in accordance with the requirements of a magnetospheric mission.

空间低能离子能谱仪地面实时测试软件设计

介绍了基于LabVIEW的空间低能离子能谱仪地面测试软件的设计思路与功能实现并给出了软件测试结果。为了实时处理空间低能离子能谱仪原理样机读出电子学获得的能谱数据,结合读出电子学的工作原理和数据格式,采用流水线结构设计了一款具有工作模式控制、实时数据接收、在线及离线数据处理等功能的地面测试软件。能谱仪在电子学自检模式下,通过软件得到的数据分析结果与理论计算值相符,Ar离子束流测试也证明了该软件能够得到离子的通道强度分布。结果表明,该软件可以将测量结果实时地显示出来,处理效率高,界面友好,满足工程人员需求。