Thermomagnetic instability in hot spherical plasma shells

2017 ◽  
Vol 338 (1) ◽  
pp. 56-60
Author(s):  
M. Mond ◽  
R. Arlt ◽  
E. Liverts
Keyword(s):  
Spherical Plasma ◽  
Thermomagnetic Instability

Experimental Investigation into Spherical Plasma Formations

2005 ◽  
Vol 64 (10) ◽  
pp. 833-839 ◽  
Author(s):  
A. A. Bulgakov ◽  
B. P. Yefimov ◽  
A. N. Kuleshov ◽  
M. O. Khorunzhiy
Keyword(s):  
Experimental Investigation ◽  
Spherical Plasma

MHD Simulation of Physical Processes in Spherical Plasma-Focus Chambers with Allowance for Neutron Generation

2020 ◽  
Vol 46 (10) ◽  
pp. 978-991
Author(s):  
S. F. Garanin ◽  
V. Yu. Dolinskii ◽  
N. G. Makeev ◽  
V. I. Mamyshev ◽  
V. V. Maslov
Keyword(s):  
Plasma Focus ◽  
Neutron Generation ◽  
Physical Processes ◽  
Mhd Simulation ◽  
Spherical Plasma

Oscillating magnetic field current drive in a spherical plasma device

2000 ◽  
Vol 42 (7) ◽  
pp. 807-821 ◽  
Author(s):  
S Xu ◽  
W Luo ◽  
K N Ostrikov ◽  
J Ahn ◽  
S Lee
Keyword(s):  
Magnetic Field ◽  
Current Drive ◽  
Plasma Device ◽  
Oscillating Magnetic Field ◽  
Spherical Plasma

Simulation of the plasma sheath dynamics in a spherical plasma focus

2015 ◽  
Vol 69 (9) ◽  
Author(s):  
Yasar Ay ◽  
Mohamed A. Abd Al-Halim ◽  
Mohamed A. Bourham
Keyword(s):  
Plasma Focus ◽  
Plasma Sheath ◽  
Spherical Plasma

scholarly journals Magnetized filament models for diverging plasma lenses

2020 ◽  
Vol 493 (2) ◽  
pp. 1736-1752
Author(s):  
Adam Rogers ◽  
Abdul Mohamed ◽  
Bailey Preston ◽  
Jason D Fiege ◽  
Xinzhong Er
Keyword(s):  
Magnetic Field ◽  
Column Density ◽  
Volume Density ◽  
Magnetized Plasma ◽  
Gravitational Lens ◽  
Line Of Sight ◽  
Density Distributions ◽  
Rotation Measure ◽  
Spherical Plasma ◽  
Helical Magnetic Field

ABSTRACT Spherical plasma lens models are known to suffer from a severe overpressure problem, with some observations requiring lenses with central pressures up to millions of times in excess of the ambient interstellar medium. There are two ways that lens models can solve the overpressure problem: a confinement mechanism exists to counter the internal pressure of the lens, or the lens has a unique geometry, such that the projected column-density appears large to an observer. This occurs with highly asymmetric models, such as edge-on sheets or filaments, with potentially low volume–density. In the first part of this work we investigate the ability of non-magnetized plasma filaments to mimic the magnification of sources seen behind spherical lenses and we extend a theorem from gravitational lens studies regarding this model degeneracy. We find that for plasma lenses, the theorem produces unphysical charge density distributions. In the second part of the work, we consider the plasma lens overpressure problem. Using magnetohydrodynamics, we develop a non self-gravitating model filament confined by a helical magnetic field. We use toy models in the force-free limit to illustrate novel lensing properties. Generally, magnetized filaments may act as lenses in any orientation with respect to the observer, with the most high-density events produced from filaments with axes near the line of sight. We focus on filaments that are perpendicular to the line of sight that show the toroidal magnetic field component may be observed via the lens rotation measure.

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