An optimized low-frequency three-axis search coil magnetometer for space research -: art. no. 044502
An optimized low-frequency three-axis search coil magnetometer for space research -: art. no. 044502
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DOI：
10.1063/1.1884026
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发表时间：
2005-04-01
影响因子：
1.6
通讯作者：
Fergeau, P
中科院分区：
文献类型：
--
作者：
Séran, HC;Fergeau, P
介绍了为科学卫星德米特研制的1 Hz-20 kHz三轴探索式线圈磁强计的设计。灵敏度是一个关键参数，因为搜索线圈必须能够探测到地球磁层中非常微弱的信号。灵敏度主要受航天器上分配的大小和质量的限制。与以前的星载搜索线圈相比，在质量和灵敏度方面都有了重大改进。对于三个搜索线圈和支架，我们在6 kHz时的噪声水平为4 FT Hz(-1/2)，质量为430g。通过对传感器阻抗的有限元分析和测量，得到了很好的一致性。搜索线圈及其前置放大器的增益和噪声模型也与测量结果吻合较好。(C)美国物理研究所。
The design of a three-axis search coil magnetometer in the 1 Hz-20 kHz range developed for the scientific satellite DEMETER is described. The sensitivity is a critical parameter as the search coil must be able to detect very weak signals in the Earth's magnetosphere. The sensitivity is mainly constrained by the size and the mass allocated onboard the spacecraft. Significant improvements are made in terms of mass and sensitivity over previous space-borne search coils. We achieve a noise level of 4 fT Hz(-1/2) at 6 kHz and a mass of 430g for the three search coils and the bracket. A good agreement is observed on the estimation by finite element analysis of the sensor impedance and the measurements. The gain and noise model of the search coil and its preamplifier also agree quite well with measurements. (C) American Institute of Physics.