THE CHARGE-ENERGY MASS SPECTROMETER FOR 0.3-300 KEV/E IONS ON THE AMPTE CCE
THE CHARGE-ENERGY MASS SPECTROMETER FOR 0.3-300 KEV/E IONS ON THE AMPTE CCE
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DOI：
10.1109/tgrs.1985.289519
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发表时间：
1985-01-01
影响因子：
8.2
通讯作者：
WINTERHOF, P
中科院分区：
文献类型：
--
作者：
GLOECKLER, G;IPAVICH, FM;WINTERHOF, P
CCE航天器上的CHEM光谱仪设计用于测量地球磁层和磁鞘中从H到Fe的所有主要离子的质量和电荷态组成以及能谱和俯仰角分布，能量为0.3至300 keV/电荷，时间分辨率小于1分钟。它具有检测人工注入锂离子的灵敏度和分辨率。作为对热等离子体成分实验和中能粒子分析仪的补充，该实验将提供有关空间等离子体和超热离子动力学过程的未决问题的基本资料。该仪器使用静电偏转、后加速和飞行时间与能量测量的组合来确定环境离子群的电离状态Q、质量M和能量E。俯仰角和各向异性的测量是利用CCE航天器的自旋运动。氢和氦的同位素被解析，单个元素直到氖，主导元素直到铁。由于采用快速符合技术结合静电偏转实现了仪器本底低，仪器具有较大的动态范围，即使在高强度辐射背景下也能识别稀有元素和离子。为了显着增加分配的遥测内实验返回的信息，作为CHEM仪器一部分的智能机载数据系统执行快速M与M/Q分类。
The CHEM spectrometer on the CCE spacecraft is designed to measure the mass and charge-state compositions as well as the energy spectra and pitch-angle distributions of all major ions from H through Fe with energies from 0.3 to 300 keV/charge and a time resolution of less than 1 min in the Earth's magnetosphere and magnetosheath. It has the sensitivity and resolution to detect artificially injected Li ions. Complementing the hot-plasma composition experiment and the medium-energy particle analyzer, this experiment will provide essential information on outstanding problems related to dynamical processes of space plasmas and of suprathermal ions. The instrument uses a combination of electrostatic deflection, post acceleration, and time of flight versus energy measurements to determine the ionization state Q, mass M, and energy E of the ambient-ion population. Pitch angle and anisotropy measurements are made utilizing the spinning motion of the CCE spacecraft. Isotopes of hydrogen and helium are resolved as are individual elements up to neon and dominant elements up to iron. Because of the intrinsically low instrument background achieved by using fast coincidence techniques combined with electrostatic deflection, the instrument has a large dynamic range and can identify rare elements and ions even in the presence of high-intensity radiation background. To increase significantly the information returned from the experiment within the allocated telemetry, an intelligent on-board data system which is part of the CHEM instrument performs fast M versus M/Q classifications.