Geotail energetic particles and ion composition instrument
Geotail energetic particles and ion composition instrument
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Geotail高能粒子及离子成分仪
DOI：
10.5636/jgg.46.39
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发表时间：
1994
期刊：
影响因子：
--
通讯作者：
F. Gliem
中科院分区：
文献类型：
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作者：
Donald J. Williams;R. Mcentire;C. Schlemm;A. Y. Liu;G. Gloeckler;S. Christon;F. Gliem
GEOTAIL卫星搭载的高能粒子和离子组成（EPIC）仪器，旨在测量粒子群的特征，这对了解地球地磁尾巴的组成和动力学非常重要。为此，由布伦瑞克工业大学（TUB）、马里兰大学（UM）和约翰霍普金斯大学应用物理实验室（JHU/APL）共同努力的EPIC由五个组件组成：超热离子成分光谱仪（STICS）传感器、STICS模拟电子元件、离子成分系统（ICS）传感器、ICS模拟电子元件和数据处理单元（DPU）。STICS传感器提供~ 4π角覆盖，组成和光谱观测，具有30 keV至230 keV/e的所有离子的电荷状态测定，每个电荷的质量测量≥7.5 keV/e。ICS传感器提供了≥50kev至3mev的元素质子通过铁的两个极角上的通量、组成、光谱和角分布，以及> 32kev和> 110kev平面上的电子通量角分布。DPU提供了多种工作模式的能力，其中一小部分将被选择用于优化GEOTAIL任务各个阶段的数据收集。迄今为止，EPIC仪器的性能非常成功。在本文中，我们描述了仪器，它的操作，并展示了一些我们的初步结果。
The Energetic Particles and Ion Composition (EPIC) instrument, flown onboard the GEOTAIL satellite, is designed to measure the characteristics of particle populations important to understanding the make-up and dynamics of the earth's geomagnetic tail. To do this, EPIC, a joint endeavor between the Technical University of Braunschweig (TUB), the University of Maryland (UM), and The Johns Hopkins University Applied Physics Laboratory (JHU/APL), is made up of five subassemblies: the Supra-Thermal Ion Composition Spectrometer (STICS) sensor, the STICS analog electronics, the Ion Composition System (ICS) sensor, the ICS analog electronics, and the Data Processing Unit (DPU). The STICS sensor provides ∼4π angular coverage, composition and spectral observations, with charge state determination for all ions from 30 keV to 230 keV/e, and mass per charge measurements ≥7.5 keV/e. The ICS sensor provides flux, composition, spectra, and angular distributions over two polar angles of the elemental species protons through iron from ≥50 keV to 3 MeV along with angular distributions in one plane of electron fluxes >32 keV and >110 keV. The DPU provides the capability of numerous operating modes from which a small number will be selected to optimize data collection throughout the many phases of the GEOTAIL mission. To date the EPIC instrument performance has been very successful. In this paper we describe the instrument, its operation, and show some of our early results.