Measurements of Magnetic Field Fluctuations for Plasma Wave Investigation by the Search Coil Magnetometers (SCM) Onboard Bepicolombo Mio (Mercury Magnetospheric Orbiter)
Measurements of Magnetic Field Fluctuations for Plasma Wave Investigation by the Search Coil Magnetometers (SCM) Onboard Bepicolombo Mio (Mercury Magnetospheric Orbiter)
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DOI：
10.1007/s11214-020-00734-2
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发表时间：
2020-10
影响因子：
10.3
通讯作者：
S. Yagitani;M. Ozaki;F. Sahraoui;L. Mirioni;M. Mansour;G. Chanteur;C. Coillot;S. Ruocco;V. Leray;M. Hikishima;D. Alison;O. Le Contel;H. Kojima;Y. Kasahara;Y. Kasaba;Takashi Sasaki;T. Yumoto;Yoshinari Takeuchi
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文献类型：
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作者：
S. Yagitani;M. Ozaki;F. Sahraoui;L. Mirioni;M. Mansour;G. Chanteur;C. Coillot;S. Ruocco;V. Leray;M. Hikishima;D. Alison;O. Le Contel;H. Kojima;Y. Kasahara;Y. Kasaba;Takashi Sasaki;T. Yumoto;Yoshinari Takeuchi
本文介绍了水星磁层轨道飞行器（BepiColombo/Mio）上的等离子体波探测（PWI）仪器——搜索线圈磁力计（SCM）的设计和性能，该仪器将首次在水星等离子体环境中测量电场、等离子体波和无线电波。单片机由两个低频正交搜索线圈传感器（LF- sc）测量航天器自旋平面上磁场的两个分量（0.1 Hz - 20khz）和一个双频搜索线圈传感器（DB-SC）在低频（LF: 0.1 Hz - 20khz）和高频（HF: 10 kHz - 640 kHz）沿自旋轴拾取第三个分量。DB-SC和两个LF-SC传感器在从航天器机身延伸的4.6米可卷曲桅杆（mast - sc）的尖端形成三轴结构，以最大限度地减少航天器电子设备发出的人工磁场污染。2018年10月20日飞船成功发射后，对SCM进行了初步功能检查。传感器和前置放大器的名义功能和性能得到了确认，即使MAST-SC被收回并存放在航天器体内，导致检测到可能来自航天器电子设备的大干扰信号。MAST-SC计划于2025年在水星轨道插入Mio之后部署，使SCM能够首次对Hermean磁层和外逸层以及当地太阳风的磁波动进行更高频率的测量。这些测量将有助于研究荷米恩等离子体环境中的基本问题，包括湍流、磁重联、波粒相互作用和粒子加速。
This paper describes the design and performance of the search coil magnetometers (SCM), which are part of the Plasma Wave Investigation (PWI) instrument onboard the BepiColombo/Mio spacecraft (Mercury Magnetospheric Orbiter), which will measure the electric field, plasma waves and radio waves for the first time in Mercury’s plasma environment. The SCM consists of two low-frequency orthogonal search coil sensors (LF-SC) measuring two components of the magnetic field (0.1 Hz – 20 kHz) in the spacecraft spin plane, and a dual-band search coil sensor (DB-SC) picking up the third component along the spin axis at both low-frequencies (LF: 0.1 Hz – 20 kHz) and high-frequencies (HF: 10 kHz – 640 kHz). The DB-SC and the two LF-SC sensors form a tri-axial configuration at the tip of a 4.6-m coilable mast (MAST-SC) extending from the spacecraft body, to minimize artificial magnetic field contamination emitted by the spacecraft electronics. After the successful launch of the spacecraft on 20 October 2018, an initial function check for the SCM was conducted. The nominal function and performance of the sensors and preamplifiers were confirmed, even with the MAST-SC being retracted and stowed in the spacecraft body, resulting in the detection of large interference signals likely from spacecraft electronics. The MAST-SC is scheduled for deployment after the Mercury orbit insertion of Mio in 2025, allowing the SCM to make the first higher frequency measurements of magnetic fluctuations in the Hermean magnetosphere and exosphere, and the local solar wind. These measurements will contribute to the investigation of fundamental problems in the Hermean plasma environment, including turbulence, magnetic reconnection, wave-particle interactions and particle acceleration.