On matching the anode ring with the magnetic field in an ATON-type Hall effect thruster

2018 ◽  
Vol 123 (22) ◽  
pp. 223301
Author(s):  
Jinwen Liu ◽  
Hong Li ◽  
Xu Zhang ◽  
Yongjie Ding ◽  
Liqiu Wei ◽  
...  
Keyword(s):  
Magnetic Field ◽  
Hall Effect ◽  
Hall Effect Thruster ◽  
The Magnetic Field

Magnetostrictive Self-Diagnosing Smart Bolts

2014 ◽  
Author(s):  
Vladislav Sevostianov
Keyword(s):  
Magnetic Field ◽  
Plastic Deformation ◽  
Magnetic Fields ◽  
Hall Effect ◽  
Stress Level ◽  
Experimental Validation ◽  
Rock Bolts ◽  
Three Point Bending ◽  
Bending Loading ◽  
The Magnetic Field

The paper presents the concept of self-diagnosing smart bolts and its experimental validation. In the present research such bolts are designed, built, and experimentally tested. As a key element of the design, wires of Galfenol (alloy of iron and gallium) are used. This material shows magnetostrictive properties, and, at the same time, is sufficiently ductile to follow typical deformation of rock bolts, and is economically affordable. Two types of Galfenol were used: Ga10Fe90 and Ga17Fe83. The wires have been installed in bolts using two designs — in a drilled central hole or in a cut along the side — and the bolts were tested for generation of the magnetic field under three-point bending loading. To measure the magnetic field in the process of deformation, a magnetometer that utilizes the GMR effect was designed, built, and compared with one utilizing the Hall effect. It is shown that (1) magnetic field generated by deformation of the smart bolts at the stress level of plastic deformation is sufficient to be noticed by the proposed magnetometer; however, the magnetometer using Hall effect is insufficient; (2) Ga10Fe90 produces higher magnetic fields than Ga17Fe83; (3) the magnetic field in plastically bended bolts is relatively stable with time.

Influence of oblique magnetic field on electron cross-field transport in a Hall effect thruster

2015 ◽  
Vol 22 (4) ◽  
pp. 043511 ◽  
Author(s):  
Jan Miedzik ◽  
Serge Barral ◽  
Dariusz Daniłko
Keyword(s):  
Magnetic Field ◽  
Hall Effect ◽  
Hall Effect Thruster ◽  
Oblique Magnetic Field

scholarly journals The hall effect in liquid electrolytes

1913 ◽  
Vol 88 (606) ◽  
pp. 588-604 ◽  
Keyword(s):  
Magnetic Field ◽  
Hall Effect ◽  
Electric Current ◽  
Metal Plate ◽  
Satisfactory Explanation ◽  
Thermo Electric ◽  
Field Independent ◽  
Set Up ◽  
The Magnetic Field ◽  
Thin Metal Plate

The distortion of the lines of flow of an electric current in a thin metal plate by the action of a magnetic field was discovered in 1879. Hall attributed this to the action of the magnetic field on the molecular currents in the metal film, which were deflected to one side or the other and accompanied by a corresponding twist of the equipotential lines. This explanation did not pass without criticism, and another theory of the effect found by Hall was published in 1884. In that paper the author seeks to explain the effect by assuming a combination of certain mechanical strains and Peltier effects, a thermo-electric current being set up between the strained and the unstrained portions. The effect of such strain was to produce a reverse effect in some metals, and these were precisely the metals for which the Hall effect was found to reverse. Aluminium was the only exception. In other respects, however, as shown by Hall in a later paper, Bidwell's theory did not stand the test of experiment, and the results lend no support to his theory, while they are in complete accordance withe the explanation that the molecular currents are disturbed by the action of the magnetic field. On the electron theory of metallic conduction, the mechanism of the Hall effect is more obvious, but at present no satisfactory explanation of the reversal found in some metals is known. Further experiments have made it clear that there is a real deflection of the elementary currents, due to the application of the magnetic field, independent of any effect due to strain.

Quantum Hall effects

Quantum 20/20 ◽  
2019 ◽  
pp. 303-322
Author(s):  
Ian R. Kenyon
Keyword(s):  
Magnetic Field ◽  
Hall Effect ◽  
Energy Gap ◽  
Quantum Hall ◽  
Free Electrons ◽  
Electron Gases ◽  
Hall Conductance ◽  
Hall Effects ◽  
The Stability ◽  
The Magnetic Field

It is explained how plateaux are seen in the Hall conductance of two dimensional electron gases, at cryogenic temperatures, when the magnetic field is scanned from zero to ~10T. On a Hall plateau σ‎xy = ne 2/h, where n is integral, while the longitudinal conductance vanishes. This is the integral quantum Hall effect. Free electrons in such devices are shown to occupy quantized Landau levels, analogous to classical cyclotron orbits. The stability of the IQHE is shown to be associated with a mobility gap rather than an energy gap. The analysis showing the topological origin of the IQHE is reproduced. Next the fractional QHE is described: Laughlin’s explanation in terms of an IQHE of quasiparticles is presented. In the absence of any magnetic field, the quantum spin Hall effect is observed, and described here. Time reversal invariance and Kramer pairs are seen to be underlying requirements. It’s topological origin is outlined.

Effect of magnetic field configuration on discharge characteristic of a Hall effect thruster with a variable channel

Vacuum ◽  
2019 ◽  
Vol 162 ◽  
pp. 78-84 ◽  
Author(s):  
Hong Li ◽  
Haotian Fan ◽  
Xingyu Liu ◽  
Minghao Ding ◽  
Yongjie Ding ◽  
...  
Keyword(s):  
Magnetic Field ◽  
Hall Effect ◽  
Field Configuration ◽  
Magnetic Field Configuration ◽  
Discharge Characteristic ◽  
Hall Effect Thruster

Spin Hall Effect in a Magnetic Field

2001 ◽  
Vol 690 ◽  
Author(s):  
Shufeng Zhang
Keyword(s):  
Magnetic Field ◽  
Diffusion Equation ◽  
Electric Field ◽  
Hall Effect ◽  
Transverse Electric ◽  
Spin Current ◽  
Magnetic Semiconductor ◽  
Hall Voltage ◽  
Spin Polarized ◽  
The Magnetic Field

ABSTRACTWhen a spin-polarized current is injected into a non-magnetic semiconductor, a transverse electric field known as Hall voltage is generated. By using a macroscopic diffusion equation, we derive the Hall voltage in the presence of both spin current and magnetic field. Novel features such as oscillating Hall signals as a function of the magnetic field and geometrical dependence of Hall signals are predicted.

Influence of hollow anode position on the performance of a hall-effect thruster with double-peak magnetic field

Vacuum ◽  
2017 ◽  
Vol 143 ◽  
pp. 251-261 ◽  
Author(s):  
Yongjie Ding ◽  
Hezhi Sun ◽  
Peng Li ◽  
Liqiu Wei ◽  
Yu Xu ◽  
...  
Keyword(s):  
Magnetic Field ◽  
Hall Effect ◽  
Double Peak ◽  
Hall Effect Thruster ◽  
Hollow Anode
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