Munin MEDUSA

Munin Spacecraft MEDUSA, Miniaturized Electrostatic DUal-tophat Spherical Analyser. MEDUSA is a combined Electron and Ion Spectrometer. The Instrument Sensor is provided by the Southwest Research Institute, San Antonio, Texas. Electrons and Ions with Energies up to 17 keV/q will be measured simultaneously, with a Resolution of 4 Energy Sweeps/s for Electrons, and 2 Sweeps/s for Ions. Particles are measured in 16 Sectors in the Plane of Acceptance, which is aligned with the Earth's Magnetic Field. The Mass of MEDUSA is 600 g and the Power Consumption is 900 mW. Particles enter the Spectrometer Aperture at any Angle in the Plane of Incidence, Electrons and Ions are then deflected into their respective Spectrometer Unit by a Spherical Electrostatic Analyser. The Particles Hit a Microchannel Plate after being filtered in Energy in the Electrostatic Analyser, the Hits are counted by Preamplifiers connected to Registers, and the Hits per Sample Interval are then further processed by the Data Processing Unit, DPU.

Munin空间探测器MEDUSA，即小型化静电双顶帽球形分析仪。MEDUSA集电子和离子光谱仪于一体。该仪器传感器由德克萨斯州圣安东尼奥的西南研究机构提供。能量高达17 keV/q的电子和离子将被同时测量，电子的分辨率可达每秒4次能量扫描，而离子的扫描频率为每秒2次。粒子在地球磁场平面的16个扇区中测量，质量为600克，功耗为900毫瓦。粒子以入射平面内任意角度进入光谱仪孔径，随后由球形静电分析仪将电子和离子偏转到各自的光谱仪单元。粒子在静电分析仪中经过能量过滤后撞击微通道板，通过连接到寄存器的前置放大器计数，数据处理单元（DPU）进一步处理每个样本间隔内的撞击次数。