Analysis and Visualization of Magnetic Field for Multi-dimensional Helmholtz Coils Based on PEEC

2021 ◽  
Author(s):  
Xiaoyun Chen ◽  
Jun Luo ◽  
Deyan Lin
Keyword(s):  
Magnetic Field ◽  
Helmholtz Coils

Development of a Therapeutic Device for Osteoporosis

2013 ◽  
Vol 302 ◽  
pp. 603-606
Author(s):  
Tian Yue ◽  
Lei Tao
Keyword(s):  
Magnetic Field ◽  
Electromagnetic Fields ◽  
Biological Effects ◽  
Homogeneous Magnetic Field ◽  
Pulsed Electromagnetic Fields ◽  
Treatment Of Osteoporosis ◽  
Non Invasive ◽  
Helmholtz Coils ◽  
Prevention And Treatment ◽  
Pulsed Electromagnetic

Pulsed electromagnetic fields (PEMF) have been reported as a non-invasive way in the prevention and treatment of osteoporosis. A new PEMF generator was designed to produce more homogeneous magnetic field than normal Helmholtz coils. The intensity and distribution of magnetic field y were calculated theoretically. The results showed that magnetic field generated by improved Helmholtz coils (three identical coils) is more intensive and homogeneous than normal Helmholtz coils (two identical coils). Moreover, this apparatus might play a significant role in the study of biological effects of PEMF on osteoporosis.

scholarly journals Simulation of the magnetic field generated by square shape Helmholtz coils

2016 ◽  
Vol 40 (23-24) ◽  
pp. 9835-9847 ◽  
Author(s):  
Ronald Hurtado-Velasco ◽  
Jesus Gonzalez-Llorente
Keyword(s):  
Magnetic Field ◽  
Helmholtz Coils ◽  
The Magnetic Field

scholarly journals Neutron and X-ray Diffraction from Exotic Magnets in Pulsed Magnetic Fields

2014 ◽  
Vol 70 (a1) ◽  
pp. C149-C149
Author(s):  
Bruce Gaulin
Keyword(s):  
Magnetic Field ◽  
Low Temperature ◽  
Magnetic Fields ◽  
Capacitor Bank ◽  
Pulsed Magnetic Fields ◽  
New Materials ◽  
X Ray Diffraction ◽  
Time Resolved ◽  
X Ray ◽  
Helmholtz Coils

Magnetic fields obtained by discharging a large capacitor bank through Helmholtz coils can be produced in excess of 25 T for relatively short periods of time, ~ 1 msec and longer. When combined with modern facilities for diffraction at modern neutron and synchrotron x-ray sources, one can study the structure and phase diagrams of new materials under extremes of magnetic field. I will present two such studies, each focussing on a new magnetic material which exhibit exotic low temperature states. I will show time-resolved neutron Laue diffraction on the multiferroic magnet MnWO4 [1], and time-resolved synchrotron x-ray studies of large magneto-elastic effects in the geometrically-frustarted pyrochlore magnet Tb2Ti2O7 [2], both in magnetic fields up to ~ 30 T. Such studies of new materials in extreme sample environments can be very revealing as to the nature of their exotic low temperature states.

scholarly journals Magnetic field computation and simulation of the coil systems using Comsol software

2018 ◽  
Vol 160 ◽  
pp. 01006 ◽  
Author(s):  
Ivan Zatonov ◽  
Pavel Baranov ◽  
Andrey Kolomeycev
Keyword(s):  
Magnetic Field ◽  
Axial Direction ◽  
Calibration System ◽  
Method Of Calculation ◽  
Helmholtz Coils ◽  
Magnetic Field Homogeneity ◽  
Different Types ◽  
Field Homogeneity ◽  
Magnetic Field Computation ◽  
The Magnetic Field

The article considers the calibration system computation with the inhomogeneity of magnetic field less than 0.1 %. Method of calculation is described. The numerical simulation using finite-element analyze was made for such system as: Helmholtz coils, improved Helmholtz coils, four and six coils system. Authors made the calculation of the magnetic field homogeneity toward axial direction. Based on procure results, authors analyzed magnetic field homogeneity and compared different types of coil systems.

scholarly journals Improvement of SiC Crystal Growth Rate and Uniformity via Top-Seeded Solution Growth under External Static Magnetic Field: A Numerical Investigation

Materials ◽  
2020 ◽  
Vol 13 (3) ◽  
pp. 651
Author(s):  
Minh-Tan Ha ◽  
Le Van Lich ◽  
Yun-Ji Shin ◽  
Si-Young Bae ◽  
Myung-Hyun Lee ◽  
...  
Keyword(s):  
Magnetic Field ◽  
Growth Rate ◽  
Fluid Flow ◽  
Crystal Growth ◽  
Static Magnetic Field ◽  
Crystal Surface ◽  
Solution Growth ◽  
Helmholtz Coils ◽  
External Static Magnetic Field ◽  
Top Seeded Solution Growth

Silicon carbide (SiC) is an ideal material for high-power and high-performance electronic applications. Top-seeded solution growth (TSSG) is considered as a potential method for bulk growth of high-quality SiC single crystals from the liquid phase source material. The crystal growth performance, such as growth rate and uniformity, is driven by the fluid flow and constitutional flux in the solution. In this study, we numerically investigate the contribution of the external static magnetic field generated by Helmholtz coils to the fluid flow in the silicon melt. Depending on the setup of the Helmholtz coils, four static magnetic field distributions are available, namely, uniform vertical upward/downward and vertical/horizontal cusp. Based on the calculated carbon flux coming to the crystal surface, the vertical downward magnetic field proved its ability to enhance the growth rate as well as the uniformity of the grown crystal.

scholarly journals Effect of Electromagnetic Field (EMF) and Electric Field (EF) on Some Behavior of Honeybees (Apis melliferaL.)

2019 ◽  
Author(s):  
Yaşar Erdoğan ◽  
Mahir Murat Cengiz
Keyword(s):  
Magnetic Field ◽  
Electric Field ◽  
Helmholtz Coils ◽  
Electro Magnetic Field ◽  
Sugar Syrup ◽  
The Earth ◽  
Rapid Spread ◽  
Electrical Devices ◽  
Electro Magnetic ◽  
The Magnetic Field

ABSTRACTGeomagnetic field can be used by different magnetoreception mechanisms, for navigation and orientation by honeybees. The present study analyzed the effects of magnetic field on honeybees. This study was carried out in 2017 at the Bayburt University Beekeeping Application Station. In this study, the effect of Electro Magnetic field (EMF) and electric field (EF) on the time of finding the source of food of honeybees and the time of staying there were determined. The honeybees behaviors were analyzed in the presence of external magnetic fields generated by Helmholtz coils equipment. The Electro Magnetic field values of the coils were fixed to 0 μT (90mV/m), 50 μT (118 mV/m), 100 μT (151 mV/m), 150 μT (211 mV/m), 200 μT (264 mV/m). Petri dishes filled with sugar syrup were placed in the center of the coils. According to the study, honeybees visited at most U1 (mean =21.0±17.89 bees) and at least U5 (mean =10.82±11.77 bees). Honeybees waited for the longest time in U1 (mean =35.27±6.97 seconds) and at least in U5 (mean =12.28±5.58 seconds). According to the results obtained from this first study showed that honeybees are highly affected by electromagnetic radiation and electric field.SummaryHoneybees uses the magnetic field of the earth to to determine their direction. Nowadays, the rapid spread of electrical devices and mobile towers leads to an increase in man-made EMF. This causes honeybees to lose their orientation and thus lose their hives.

Sign in / Sign up

Export Citation Format

Share Document