Features of the Radial and Axial Distributions of the Toroidal Magnetic Field in the Axial Jet Ejection at the PF-3 Facility

Experimental evidence and a theoretical model are presented for the magnetoelastic buckling of a rigid superconducting ring in a steady circumferential (toroidal)magnetic field. The theoretical model predicts a coupled translation and pitch displacement of the coil in the buckled mode. A discussion is given of both the linear and nonlinear magnetic perturbation forces. The experiments were conducted in liquid helium (4.2°K). The lowest natural frequency of the rigid coil on elastic springs was observed to decrease near the buckling current. Agreement between theory and experiment is fair. These results may have design implications for poloidal field coils in magnetic fusion Tokamak reactors.

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Magnetohydrodynamic Equilibrium with Spheroidal Plasma-Vacuum Interface –Compact Toroid without Toroidal Magnetic Field–

Journal of the Physical Society of Japan ◽

10.1143/jpsj.52.2016 ◽

1983 ◽

Vol 52 (6) ◽

pp. 2016-2024 ◽

Cited By ~ 6

Author(s):

Shobu Kaneko ◽

Katsuji Chiyoda ◽

Isao Hirota

Keyword(s):

Magnetic Field ◽

Toroidal Magnetic Field ◽

Compact Toroid ◽

Vacuum Interface

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Fusion triple product increase in ten times in the compact spherical tokamak Globus-M2 due the doubling of the toroidal magnetic field

Nuclear Fusion ◽

10.1088/1741-4326/abe08c ◽

2021 ◽

Author(s):

Gleb Kurskiev ◽

Vasily K Gusev ◽

Nikolay Sakharov ◽

I M Balachenkov ◽

Nikolai Nikolaevich Bakharev ◽

...

Keyword(s):

Magnetic Field ◽

Triple Product ◽

Toroidal Magnetic Field ◽

Spherical Tokamak ◽

Product Increase

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Are there local dynamo in solar polar region?

Proceedings of the International Astronomical Union ◽

10.1017/s1743921320001428 ◽

2019 ◽

Vol 15 (S354) ◽

pp. 123-126

Author(s):

Chunlan Jin

Keyword(s):

Magnetic Field ◽

Active Region ◽

Polar Region ◽

Toroidal Magnetic Field ◽

Polar Magnetic Field ◽

Random State

AbstractPolar magnetic field, as a component produced by the global dynamo, is thought to be the remant of toroidal magnetic field transported poleward from Sun’s active belt. With the improvement of instruments, more and more observations are challenging the viewpoint. Recently, we identify the bipolar magnetic emergences (BMEs) in the polar region, and find that the distribution of the magnetic axes for these BMEs shows random state, which does not follow the Joy’s law of active region. The result implies the possible existence of local dynamo in the solar polar region.

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The global toroidal magnetic field generated in the Earth's oceans

Earth and Planetary Science Letters ◽

10.1016/j.epsl.2018.12.026 ◽

2019 ◽

Vol 509 ◽

pp. 47-54 ◽

Cited By ~ 2

Author(s):

Jakub Velímský ◽

Libor Šachl ◽

Zdeněk Martinec

Keyword(s):

Magnetic Field ◽

Toroidal Magnetic Field

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Optical polarization properties of AGNs with significant VLBI–Gaia offsets

Monthly Notices of the Royal Astronomical Society Letters ◽

10.1093/mnrasl/slaa008 ◽

2020 ◽

Vol 493 (1) ◽

pp. L54-L58 ◽

Cited By ~ 2

Author(s):

Y Y Kovalev ◽

D I Zobnina ◽

A V Plavin ◽

D Blinov

Keyword(s):

Magnetic Field ◽

Active Galactic Nuclei ◽

Observational Data ◽

Galactic Nuclei ◽

Field Structure ◽

Toroidal Magnetic Field ◽

Accretion Discs ◽

Optical Polarization ◽

Polarization Direction ◽

Magnetic Field Structure

ABSTRACT Significant positional offsets of the value from 1 mas to more than 10 mas were found previously between radio (VLBI) and optical (Gaia) positions of active galactic nuclei (AGNs). They happen preferentially parallel to the parsec-scale jet direction. AGNs with VLBI-to-Gaia offsets pointed downstream the jet are found to have favourably higher optical polarization, as expected if extended optical jets dominate in the emission and shift the Gaia centroid away from the physical nucleus of the source. Upstream offsets with the suggested domination of accretion discs manifest themselves through the observed low optical polarization. Direction of linear optical polarization is confirmed to preferentially align with parsec-scale jets in AGNs with dominant jets consistent with a toroidal magnetic field structure. Our findings support the disc–jet interpretation of the observed positional offsets. These results call on an intensification of AGN optical polarization monitoring programs in order to collect precious observational data. Taken together with the continued VLBI and Gaia observations, they will allow researchers to reconstruct detailed models of the disc–jet system in AGNs on parsec scales.

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