The Calculation and Measurement of Helmholtz Coil Fields

DeTroye, David J.; Chase, Ronald J.

doi:10.21236/ada286081

Cited by 13 publications

(5 citation statements)

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“…To determine the level of magnetic interference due to the proximity of system components such as the battery, the logger, and the interface board, the deviation from linearity and sensitivity are determined when the system is assembled and set in a functional mode (all components switched on). This was done in a Helmholtz coil system [ DeTroye and Chase , ] where a known magnetic field is applied and the response of each channel to the applied field is analyzed.…”

Section: Data and Acquisitionmentioning

confidence: 99%

Differential magnetometer method applied to measurement of geomagnetically induced currents in Southern African power networks

et al. 2016

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Geomagnetically induced currents (GICs) in conductors connected to the Earth are driven by an electric field produced by a time-varying magnetic field linked to magnetospheric-ionospheric current perturbations during geomagnetic storms. The GIC measurements are traditionally done on the neutral-to-ground connections of power transformers. A method of inferring the characteristics of GIC in power lines using differential magnetic field measurements is presented. Measurements of the GIC in the power lines connected to a particular power transformer are valuable in the verification of the modeling of GIC in the power transmission network. The differential magnetometer method (DMM) is an indirect method used to estimate the GIC in a power line. With the DMM, low-frequency GIC in the power line is estimated from the difference between magnetic field recordings made directly underneath the power line and at some distance away, where the magnetic field of the GIC in the transmission line has negligible effect. Results of the first application of the DMM to two selected sites of the Southern African power transmission network are presented. The results show that good quality GIC measurements are achieved through the DMM using Commercially-Off-The-Shelf magnetometers.

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Section: Data and Acquisitionmentioning

confidence: 99%

Differential magnetometer method applied to measurement of geomagnetically induced currents in Southern African power networks

et al. 2016

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“…Se puede demostrar que un radio de las espiras (R) de 0.48 m permite que la jaula de las dimensiones indicadas se encuentre dentro de un "cilindro" de uniformidad de campo mayor al 99 % [13][14][15][16].…”

Section: Determinación De La Configuración Del Generador: Sistema De Bobinas De Helmholtzunclassified

Design, Development and Characterization of an Extremely Lowfrequency Electromagnetic Fields Generator

Correa¹,

Naudi

Diliscia³

et al. 2021

AnAFA

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n this article we present the results of the design, development and characterization of an extremely low-frequency electromagnetic fields generator to carry out experiments with small animals. For the design of the exposure system, we took into account that its configuration should allow the application of an electromagnetic field that meets uniformity and field intensity criteria, while making it possible to observe, manipulate and locate the sample easily, a fact that imposes accessibility requirements. For the application of different electromagnetic fields exposure protocols in the future, the generator must allow calibrated and homogeneous emissions, under known exposure conditions. Results of the constructive process are presented, in which the proposed materials and methods are analyzed, as well as the system performance results.

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“…[17][18][19][20]). In the most general case, it is possible to show that after some manipulations of the Biot-Savart law, the magnetic field created by a circular loop in Cartesian coordinates at any point in space is given by [20][21][22][23]:…”

Section: The Helmholtz and Maxwell Coilsmentioning

confidence: 99%

Exploring the magnetic field of Helmholtz and Maxwell coils: a computer-based approach exploiting the superposition principle

García-Farieta

Márquez

2020

Rev. Bras. Ensino Fís.

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Teaching magnetism is one of the most challenging topics at undergraduate level in programmes with scientific background. A basic course includes the description of the magnetic interaction along with empirical results such as the Biot-Savart law's. However, evaluating the magnetic field due to certain current carrying system at any point in space is not an easy task, especially for points in space where symmetry arguments cannot be applied. In this paper we study the magnetic field produced by both Helmholtz and Maxwell coils at all points in space by using a hybrid methodology that combines the superposition principle and an analytical result. We implement a computational approach, that is based on iterating n times the magnetic field produced by a finite current-carrying wire, to evaluate the magnetic field at any point in space for coils arrangements without using advanced calculus. This methodology helps teachers and students to explore the field due to systems with different levels of complexity, combining analytical and computational skills to visualize and analyse the magnetic field. After our analysis, we show that this is an useful approach to emphasize fundamental concepts and mitigate some of the issues that arise when evaluating the magnetic field for systems proposed in introductory physics textbooks.

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The Calculation and Measurement of Helmholtz Coil Fields

Abstract: Ple-bed tY ANSI Sid Z39 18

Cited by 13 publications

References 0 publications

Differential magnetometer method applied to measurement of geomagnetically induced currents in Southern African power networks

Differential magnetometer method applied to measurement of geomagnetically induced currents in Southern African power networks

Design, Development and Characterization of an Extremely Lowfrequency Electromagnetic Fields Generator

Exploring the magnetic field of Helmholtz and Maxwell coils: a computer-based approach exploiting the superposition principle

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