Etude Numérique de la Section Efficace de Diffusion d'un Faisceau Laser par un Plasma en Champ Magnétique. Application à la Détermination Expérimentale de la Direction du Champ Magnétique de Confinement

1973 ◽  
Vol 51 (3) ◽  
pp. 266-276 ◽  
Author(s):  
R. L. Meyer ◽  
G. Leclert ◽  
M. Felden
Keyword(s):  
Magnetic Field ◽  
Cross Section ◽  
Field Intensity ◽  
Magnetic Field Intensity ◽  
Scattered Wave ◽  
Magnetic Field Direction ◽  
Section Efficace ◽  
Experimental Conditions ◽  
Champ Magnétique ◽  
The Magnetic Field

We study the influence of the magnetic field intensity and direction with respect to the wave vector on the scattering cross-section resonances. We deduce the best experimental conditions for studying these resonances. It is shown that the spectrum modulation of the scattered wave can be used to measure, in some configurations, the confining magnetic field direction.

Effects of Magnetic Field Intensity on Carbon Diffusion in Pure Iron in Paramagnetic Ferrite Region

2016 ◽  
Vol 879 ◽  
pp. 2434-2438
Author(s):  
Zhi Wei Zhang ◽  
Yan Wu ◽  
Xiang Zhao
Keyword(s):  
Magnetic Field ◽  
Curie Temperature ◽  
Field Intensity ◽  
Pure Iron ◽  
Magnetic Field Intensity ◽  
Carbon Diffusion ◽  
Magnetic Field Direction ◽  
Direction Parallel ◽  
Ferrite Region ◽  
The Magnetic Field

Effects of magnetic field intensity on carbon diffusion in pure iron in paramagnetic ferrite region above the Curie temperature were investigated using carburizing technology. It was found that the magnetic field intensity can significantly affect the carbon diffusion behavior in pure iron in paramagnetic ferrite region in the direction parallel to the magnetic field direction, both the carbon diffusion coefficient and the average carbon diffusion distance increase gradually with the increasing of the magnetic field intensity. Magnetic field annealing obviously promotes the carbon diffusion in pure iron in the direction parallel to the magnetic field in paramagnetic ferrite region above the Curie temperature, and promotion effect increases with the enhancement of the magnetic field intensity. The structure defects made by the magnetic field may cause the increasing of carbon diffusion flux.

Effect of High Magnetic Field on Diffusion Behavior of Carbon in Pure Iron

2011 ◽  
Vol 194-196 ◽  
pp. 67-70 ◽  
Author(s):  
Yan Wu ◽  
Yan Lu ◽  
Xiang Zhao ◽  
Liang Zuo
Keyword(s):  
Magnetic Field ◽  
High Magnetic Field ◽  
Field Intensity ◽  
Pure Iron ◽  
Magnetic Field Intensity ◽  
Carbon Diffusion ◽  
Field Direction ◽  
Magnetic Field Direction ◽  
Diffusion Behavior ◽  
The Magnetic Field

The effect of magnetic field on diffusion behavior of carbon in pure iron was investigated. The results showed that the magnetic field can accelerate the carbon diffusion when the magnetic field direction is perpendicular to the carburized direction, and this effect increases with the enhancement of magnetic field intensity.

Effects of Magnetic Field Intensity on Carbon Diffusion in Pure Iron in the Single-Phase Austenite Region

2012 ◽  
Vol 706-709 ◽  
pp. 2372-2377 ◽  
Author(s):  
Yan Wu ◽  
Yan Lu ◽  
Xiang Zhao ◽  
Liang Zuo
Keyword(s):  
Magnetic Field ◽  
Field Intensity ◽  
Pure Iron ◽  
Single Phase ◽  
Magnetic Field Intensity ◽  
Isothermal Holding ◽  
Carbon Diffusion ◽  
Magnetic Field Direction ◽  
Magnetic Filed ◽  
The Magnetic Field

Effects of magnetic field intensity on carbon diffusion in pure iron in the single-phase austenite region were investigated. Specimens of high purity iron (99.99%) were buried in an air-proof melting pot filled up with cementation agent, and respectively subjected to isothermal annealing at 930° for 25 min with a heating rate of 5°C /min, and then cooled in the furnace. A magnetic field with different intensity was applied during the whole heating, isothermal holding and cooling processes. The results showed that the magnetic field annealing obviously hinders the carbon diffusion in the direction perpendicular to the magnetic field direction and this effect increased with the enhancement of magnetic filed intensity.

Tunable amplified spontaneous emission based on liquid magnetically responsive photonic crystals

2019 ◽  
Vol 7 (13) ◽  
pp. 3740-3743 ◽  
Author(s):  
Ying Li ◽  
Yue Long ◽  
Guoqiang Yang ◽  
Chen-Ho Tung ◽  
Kai Song
Keyword(s):  
Magnetic Field ◽  
Photonic Crystals ◽  
Spontaneous Emission ◽  
Field Intensity ◽  
Magnetic Field Intensity ◽  
Amplified Spontaneous Emission ◽  
The Magnetic Field

The wavelength of amplified spontaneous emission based on liquid magnetically responsive photonic crystals can be tuned by simply changing the magnetic field intensity.

scholarly journals A Novel Method for Improving Low-Temperature Flotation Performance of Nonpolar Oil in the Molybdenite Flotation

Minerals ◽  
2019 ◽  
Vol 9 (10) ◽  
pp. 609 ◽  
Author(s):  
Wan ◽  
Qu ◽  
Li ◽  
He ◽  
Bu ◽  
...  
Keyword(s):  
Magnetic Field ◽  
Surface Tension ◽  
Low Temperature ◽  
Interfacial Tension ◽  
Field Intensity ◽  
Magnetic Field Intensity ◽  
Maximum Surface ◽  
Flotation Recovery ◽  
Flotation Performance ◽  
The Magnetic Field

Nonpolar hydrocarbon oil (NHO) is one of the most extensively used collectors in the flotation of molybdenite due to its excellent selectivity. However, NHO has low sensibility at pulp temperature. At low temperatures (<283 K), although more kerosene is used, the recovery of molybdenite flotation is still lower than at room temperature. In this study, magnetizing treatment, which is an efficient, low-cost, innovative, and environmentally friendly emulsification method, was used to improve the flotation performance of NHO in low-temperature molybdenite flotation. The test results showed that, compared with unmagnetized kerosene (UMK), the optimum dosage of magnetized kerosene (MK) could be reduced by 11% at 298 K. At the same dosage of kerosene, the flotation recovery of MK was 3% higher than UMK at 278 K. The surface tension measurement results showed that the surface tension of MK rose periodically as the magnetic field intensity increased, and there was a maximum surface tension within each period. Further, the magnetic field intensity had the maximum flotation recovery of molybdenite at the maximum surface tension of MK. Combined with the analysis based on the Girifalco–Good theory and the static drop volume method of interfacial tension, the interfacial tension of kerosene–water was shown to decrease with the increase of the surface tension of kerosene. This finding indicates that the dispersibility of kerosene in pulp could be improved by reducing the size of oil droplets, thereby improving the molybdenite flotation recovery of kerosene at low-temperature pulp. It is helpful to improve the flotation recovery of molybdenite using NHO as a collector for low-temperature pulp (<283 K).

Viscosity of Potassium Dihydrogen Phosphate Aqueous Solution within Magnetic Field

2017 ◽  
Vol 898 ◽  
pp. 1783-1786
Author(s):  
Lei Zhang ◽  
Yi Su ◽  
Yu Lin Wu ◽  
Yao Liu ◽  
Yong Wang ◽  
...  
Keyword(s):  
Magnetic Field ◽  
Aqueous Solution ◽  
Field Intensity ◽  
Magnetic Field Intensity ◽  
Extreme Values ◽  
Potassium Dihydrogen Phosphate ◽  
Experimental Results ◽  
Dihydrogen Phosphate ◽  
Potassium Dihydrogen ◽  
The Magnetic Field

The viscosity of potassium dihydrogen phosphate, KH2PO4 (KDP), aqueous solution within magnetic field was studied. Experimental results showed that, the viscosity of saturated KDP solution exhibited multiple extreme values when the magnetic field intensity increased from 0 Gs to 2250 Gs. Influences of the magnetic field intensity on the viscosity of KDP solution were very complicated. It’s concerned with the temperature and the concentration of solution. As the KDP was produced from aqueous solution within magnetic field, the temperature and the concentration of solution also needed to be carefully controlled. Magnetic field with intensity values of 300 Gs, 600 Gs and 1800 Gs, all have the strong effects on the structures of KDP aqueous solution.

Magnetorheological properties and polishing characteristics of silica-coated carbonyl iron magnetorheological fluid

2017 ◽  
Vol 29 (1) ◽  
pp. 137-146 ◽  
Author(s):  
Kwang Pyo Hong ◽  
Ki Hyeok Song ◽  
Myeong Woo Cho ◽  
Seung Hyuk Kwon ◽  
Hyoung Jin Choi
Keyword(s):  
Magnetic Field ◽  
Surface Roughness ◽  
Field Intensity ◽  
Carbonyl Iron ◽  
Material Removal ◽  
Magnetic Field Intensity ◽  
Magnetorheological Fluid ◽  
Wheel Speed ◽  
Magnetorheological Fluids ◽  
Experimental Conditions

While magnetorheological fluids can be used for ultra-precise polishing, for example, of advanced optical components, oxidation of metallic particles in water-based magnetorheological fluids causes irregular polishing behavior. In this study, carbonyl iron microspheres were initially coated with silica to prevent oxidation and were used to polish BK7 glass. In addition, their rheological and sedimentation characterizations were investigated. Material removal and surface roughness were analyzed to investigate the surface quality and optimal experimental conditions of polishing wheel speed and magnetic field intensity. The maximum material removal was 0.95 µm at 95.52 kA/m magnetic field intensity and 1854 mm/s wheel speed. A very fine surface roughness of 0.87 nm was achieved using the silica-coated magnetorheological fluid at 47.76 kA/m magnetic field intensity and 1854 mm/s wheel speed.

The role of the magnetic field intensity and geometry in the type III burst generation

Solar Physics ◽  
1990 ◽  
Vol 130 (1-2) ◽  
pp. 31-37 ◽  
Author(s):  
P. Zlobec ◽  
V. Ruždjak ◽  
B. Vršnak ◽  
M. Karlický ◽  
M. Messerotti
Keyword(s):  
Magnetic Field ◽  
Field Intensity ◽  
Magnetic Field Intensity ◽  
Type Iii ◽  
The Magnetic Field

Improved the Performance of Focusing Deep Hyperthermia Inductive Heating for Breast Cancer Treatment by Using Ferro-Fluid with Magnetic Shielding System

2013 ◽  
Vol 325-326 ◽  
pp. 353-358 ◽  
Author(s):  
Thosdeekoraphat Thanaset ◽  
Santalunai Samran ◽  
Thongsopa Chanchai
Keyword(s):  
Magnetic Field ◽  
Field Intensity ◽  
Magnetic Fluid ◽  
Magnetic Field Intensity ◽  
Magnetic Shielding ◽  
Inductive Heating ◽  
Surrounding Healthy Tissue ◽  
The Magnetic Field ◽  
Shielding System ◽  
Deep Hyperthermia

The performance improved of focusing deep hyperthermia inductive heating for breast cancer treatment using magnetic fluid nanoparticles with magnetic shielding system has been presented in the paper and the results are discussed. It is a technique challenge in hyperthermia therapy is to control locally heat the tumor region up to an appropriate temperature to destroy cancerous cells, without damaging the surrounding healthy tissue by using magnetic fluid nanoparticles and cylindrical metal shielding with aperture. We show that the magnetic field intensity can be controlled by changing the aperture size to suitable. In addition, the position of the heating can be controlled very well with the magnetic fluid together with shielding system. In the simulation, the inductive applicator is a ferrite core with diameter of 7 cm and excited by 4 MHz signal. Results have shown that the temperature increments depend on the magnetic fluid nanoparticles. In addition, the magnetic field intensity without damaging the surrounding healthy tissue when used magnetic shielded system. These results demonstrate that it is possible to achieve higher temperatures and to focus magnetic field intensity where the nanoparticles and magnetic shielding system are used.

Design and Fabrication of a Micro-Actuator Based on Electromagnetic Membrane Device

2012 ◽  
Vol 488-489 ◽  
pp. 1451-1456
Author(s):  
Rong Hua Ma ◽  
Jian Hao Zhong
Keyword(s):  
Magnetic Field ◽  
Field Intensity ◽  
Magnetic Field Intensity ◽  
Physical Size ◽  
Ac Power ◽  
Coil Structure ◽  
Electro Magnetic ◽  
Ndfeb Permanent Magnet ◽  
The Magnetic Field ◽  
A Current

The purpose of this study is to develop a micro electro-magnetic actuator manufactured by MEMS-based fabrication and electroplating techniques. This actuator presented a novel technique in the electromagnetic fabrication and smaller physical size than the traditional counterparts for micro actuators and provides a faster response time and lower cost. A micro coil structure is released from FeCl3 etchant and bonded on a thin film (Parafilm”M”, Pechiney Plastic Packaging Inc.) to achieve an actuator-membrane structure. When an external AC power is applied to a micro coil, a magnetic field is created to attract and repel through an NdFeB permanent magnet, and the displacement of the membrane is increased as a current of AC power. The results show the measured magnetic field intensity weakens as the distance between the coil and the Gauss meter probe increases. However, it is observed that the magnetic field intensity does not increase linearly with the number of series coils, which is due to the distance between series coils.

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