Improvement of Formula and Uncertainty of the Reference Magnetic Field for AC Magnetometer Calibration

Author

Ishii, M. ; Ketzler, Rainer ; Albrecht, Martin ; Kurokawa, Satoru ; Shimada, Yusuke

Author_Institution

Nat. Inst. of Adv. Ind. Sci. & Technol., Tsukuba, Japan

Volume

62

Issue

6

fYear

2013

fDate

Jun-13

Firstpage

1443

Lastpage

1449

Abstract

In this paper, an ac magnetic field standard system for ac magnetometer calibration is described. The target field strength and frequency range are 7.162 A/m (9 μT ) and 50-60 Hz, respectively. The system to generate a reference magnetic field is based on the Helmholtz coil formula. However, this well-known formula is precise only for dc magnetic fields. Therefore, we improve the formula for ac magnetic fields. The uncertainties of the reference magnetic field and magnetometer calibration are also improved. Validation is achieved by using two calibration systems based on different principles.

Keywords

calibration; coils; electric current measurement; magnetic field measurement; magnetometers; measurement uncertainty; AC magnetic field standard system; AC magnetometer calibration system; DC magnetic field; Helmholtz coil formula; frequency 50 Hz to 60 Hz; measurement uncertainty; reference magnetic field uncertainty; Calibration; Coils; Magnetic separation; Magnetometers; Nuclear magnetic resonance; Uncertainty; AC magnetometer; Helmholtz coil; calibration; electromagnetic compatibility (EMC); nuclear magnetic resonance (NMR); reference ac magnetic field; uncertainty;

fLanguage

English

Journal_Title

Instrumentation and Measurement, IEEE Transactions on

Publisher

ieee

ISSN

0018-9456

Type

jour

DOI

10.1109/TIM.2013.2239032

Filename

6450096