Performance evaluation of a miniature magnetic sector mass spectrometer onboard a satellite in space
Performance evaluation of a miniature magnetic sector mass spectrometer onboard a satellite in space
复制标题
空间卫星上微型扇形磁质谱仪的性能评估
DOI：
10.1177/1469066717741746
复制
发表时间：
2018-04-01
影响因子：
1.3
通讯作者：
Li, Yanwu
中科院分区：
文献类型：
--
作者：
Guo, Meiru;Li, Detian;Li, Yanwu
随着我国空间技术的快速发展，迫切需要利用质谱仪对空间环境进行探测。本文介绍了一种空间小型扇形磁质谱计，它由三个子系统组成：（1）物理单元，（2）电气控制单元，（3）高压电源。该质谱仪具有双轨道90°扇形磁场分析器，其中一个轨道测量范围为1 ~ 12 amu，另一个轨道测量范围为6 ~ 90 amu，质谱仪有两种工作模式，一种是在质谱仪离子源灯丝开启时测量空间中性气体，另一种是在灯丝关闭时测量空间带电离子。该装置的绝对分辨率小于1 amu，最小可探测离子电流约为10 - 13 A，灵敏度为10 - 6 A/Pa（N2）。它的整体尺寸为170 mm × 165 mm × 170 mm，重量为4.5 kg，功耗为18 W发射前在地面进行了高低温循环、冲击、振动、热真空循环等一系列环境适应性试验，还进行了灵敏度和峰值位置地面标定。2012年11月，质谱仪被一颗实验卫星携带到499公里的太阳同步，现在仍在工作。它成功地探测了卫星轨道上的大气成分和卫星排放的气体，包括O，He，12 CO2，13 CO2，H2，N2，O2，H2O等。
With the rapid development of space technology in China, it is urgent to use mass spectrometer to detect the space environment. In this work, a space miniature magnetic sector mass spectrometer is evaluated, which consists of three subsystems: (1) physical unit, (2) electric control unit, (3) and high voltage power. It has 90° magnetic sector-field analyzer with double trajectory, in which a trajectory measurement range is from 1 to 12 amu, the other range is from 6 to 90 amu.The mass spectrometer has two work models, one is used to measure space neutral gas when the filament of mass spectrometer ion source turned on, the other is used to measure space charged ions when the filament turned off. The absolute resolution of this device is less than 1 amu, the minimum detectable ion current is about 10−13A, and the sensitivity is 10−6A/Pa (N2). Its overall size is 170 mm × 165 mm × 170 mm, its weight is 4.5 kg, and its power consumption is 18 W. A series of environmental adaptability tests, including high and low temperature cycle, shock, vibration, thermal vacuum cycle, were carried out on the ground before launching, and sensitivity and peak position were also calibrated on the ground. In November 2012, the mass spectrometer was carried by an experimental satellite to 499 km sun synchronization and is still working right now. It successfully detected the atmosphere compositions both in the satellite orbit and gas-emitted from satellite, including O, He,12CO2,13CO2, H2, N2, O2, H2O, and so on.