Performance Test of Search Coil Sensors with Different Core Types

被引：0
作者：
Kang, Hyeonji [1 ]
Jin, Ho [1 ]
Jang, Yunho [1 ]
Lee, Seungmin [1 ]
Park, Hyeonhu [1 ]
Kim, Juhyeong [1 ]
Jo, Wooin [1 ]
机构：
[1] Kyung Hee Univ, Sch Space Res, Yongin 17104, South Korea
来源：
JOURNAL OF ASTRONOMY AND SPACE SCIENCES | 2024年 / 41卷 / 03期
基金：
新加坡国家研究基金会;
关键词：
search coil magnetometer; magnetic core; miniaturized instruments; lightweight; DEMAGNETIZING FACTORS; MAGNETOMETER; FLUXGATE; INSTRUMENT; DESIGN;
D O I：
10.5140/JASS.2024.41.3.139
中图分类号：
P1 [天文学];
学科分类号：
0704 ;
摘要：
A search coil magnetometer (SCM) is a common equipment to observe energy transmission and vibrations in space physics, enabling measurements across a wide frequency range of up to tens of kilohertz. This study proposes the designs of a magnetic core that allows a low-mass sensor and improves its performance: a rod core, sheet-stacked core, and rolling-sheet core. Subsequently, the performance of each sensor was investigated. The sheet-stacked core using the cobalt-based alloy exhibited the highest sensitivity, although it exhibited instability beyond 20 kHz. In contrast, the rod and rolling-sheet core sensors demonstrated stability in the magnetic field measurements (10 Hz-40 kHz). Moreover, the noise equivalent magnetic induction (NEMI) of the rod- and rolling-sheet core sensors were 0.014 pT Hz(-1/2) and 0.012 pT Hz(-1/2) at 1 kHz, respectively. The rolling-sheet core with high relative permeability achieved a mass reduction of over three times that of the rod core while exhibiting sufficient sensitivity.
引用
收藏
页码：139 / 148
页数：10
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