Strofio: A novel neutral mass spectrograph for sampling Mercury's exosphere
Strofio: A novel neutral mass spectrograph for sampling Mercury's exosphere
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Strofio：一种用于对水星外逸层进行采样的新型中性质谱仪
DOI：
10.1109/aero.2012.6187066
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发表时间：
2012
期刊：
影响因子：
--
通讯作者：
J. Scheer
中科院分区：
文献类型：
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作者：
R. Gurnee;S. Livi;M. Phillips;M. Desai;J. Hayes;G. Ho;R. Hourani;S. Jaskulek;J. Scheer
Strofio是一项科学调查，对水星外逸层中的中性原子进行现场采样。Strofio基于一种新型质谱仪，该质谱仪通过飞行时间（TOF）技术确定粒子的每电荷质量（m/q）。这种新技术在质量18处实现了> 100的质量分辨率（m/Δm），具有0.14（计数/s）/（粒子/cm 3）的高灵敏度，并且质量仅为4kg。Strofio采用旋转电场来“标记”进入电离粒子的开始时间，并采用微通道板（MCP）检测器来记录停止时间和位置。这消除了对箔片或快门的需要，从而实现了近100%的占空比和低质量设计。Strofio是由美国宇航局资助的欧洲航天局的使命BepiColombo飞往水星。它是位于水星行星轨道器（MPO）上的四个仪器SERENA套件的一部分，该套件将进入400 × 1500公里的极地轨道。本文介绍了操作原理、仪器组件，并重点介绍了读取和积累颗粒数据所需的前端电子设备和处理。
Strofio is a scientific investigation to sample in-situ the neutral atoms in Mercury's exosphere. Strofio is based on a novel mass spectrograph that determines the particle mass-per-charge (m/q) by a time-of-flight (TOF) technique. This novel technique achieves a mass resolution (m/Δm) at mass 18 of >;100, with a high sensitivity of 0.14 (counts/s)/(particles/cm3) and a mass of only 4kg. Strofio employs a rotating electric field to “stamp” the start time of the incoming ionized particles and a micro-channel plate (MCP) detector to record the stop time and position. This eliminates the need for foils or shutters, resulting in nearly 100% duty cycle and a low mass design. Strofio is funded by NASA to fly on the European Space Agency mission BepiColombo to the planet Mercury. It is part of the four instrument SERENA suite situated on the Mercury Planetary Orbiter (MPO), which will enter in a 400 × 1500km polar orbit. This paper describes the theory of operation, the instrument components, and focuses on the front end electronics and processing required to read and accumulate the particle data.