This article is about the physics phenomenon. For the computer software feature, see KDE Plasma 5 § Desktop features. For the DNA molecule, see plasmid.
A plasmoid is a coherent structure of plasma and magnetic fields. Plasmoids have been proposed to explain natural phenomena such as ball lightning,[1][2] magnetic bubbles in the magnetosphere,[3] and objects in cometary tails,[4] in the solar wind,[5][6] in the solar atmosphere,[7] and in the heliospheric current sheet. Plasmoids produced in the laboratory include field-reversed configurations, spheromaks, and in dense plasma focuses.
The word plasmoid was coined in 1956 by Winston H. Bostick (1916-1991) to mean a "plasma-magnetic entity":[8]
The plasma is emitted not as an amorphous blob, but in the form of a torus. We shall take the liberty of calling this toroidal structure a plasmoid, a word which means plasma-magnetic entity. The word plasmoid will be employed as a generic term for all plasma-magnetic entities.
^Silberg, Paul A. (November 1962). "Ball lightning and plasmoids". Journal of Geophysical Research. 67 (12): 4941–4942. Bibcode:1962JGR....67.4941S. doi:10.1029/JZ067i012p04941.
^Friday, DM; Broughton, PB; Lee, TA; Schutz, GA; Betz, JN; Lindsay, CM (3 October 2013). "Further insight into the nature of ball-lightning-like atmospheric pressure plasmoids". The Journal of Physical Chemistry A. 117 (39): 9931–40. Bibcode:2013JPCA..117.9931F. doi:10.1021/jp400001y. PMID 23767686.
^Hones, E. W., Jr., "The magnetotail - Its generation and dissipation", (1976) Physics of solar planetary environments; Proceedings of the International Symposium on Solar-Terrestrial Physics, Boulder, Colo., June 7–18, 1976. Volume 2.
^Roosen, R. G.; Brandt, J. C., "Possible Detection of Colliding Plasmoids in the Tail of Comet Kohoutek" (1976), Study of Comets, Proceedings of IAU Colloq. 25, held in Greenbelt, MD, 28 October - 1 November 1974. Edited by B. D. Donn, M. Mumma, W. Jackson, M. A'Hearn, and R. Harrington. National Aeronautics and Space Administration SP 393, 1976., p.378
^Lemaire, J.; Roth, M. (1981). "Differences between solar wind plasmoids and ideal magnetohydrodynamic filaments". Planetary and Space Science. 29 (8): 843–849. Bibcode:1981P&SS...29..843L. doi:10.1016/0032-0633(81)90075-1.
^Wang, S.; Lee, L. C.; Wei, C. Q.; Akasofu, S.-I., A mechanism for the formation of plasmoids and kink waves in the heliospheric current sheet (1988) Solar Physics (ISSN 0038-0938), vol. 117, no. 1, 1988, p. 157-169.
^Cargill, P. J.; Pneuman, G. W., "The energy balance of plasmoids in the solar atmosphere" (1986), Astrophysical Journal, Part 1 (ISSN 0004-637X), vol. 307, Aug. 15, 1986, p. 820-825.
^Bostick, Winston H (1956). "Experimental Study of Ionized Matter Projected across a Magnetic Field". Physical Review. 104 (2): 292–299. Bibcode:1956PhRv..104..292B. doi:10.1103/physrev.104.292.
A plasmoid is a coherent structure of plasma and magnetic fields. Plasmoids have been proposed to explain natural phenomena such as ball lightning, magnetic...
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vaporized by huge eddy currents into a stable, self-confined toroidal plasmoid and was accelerated to 100 km/s. Sakharov later suggested replacing the...
some tail plasma can separate ("magnetic reconnection"); some blobs ("plasmoids") are squeezed downstream and are carried away with the solar wind; others...
capillary injection have been employed. After armature formation, the plasmoid is then accelerated down the length of the railgun by a current pulse driven...
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configuration plasmoids" Nucl. Fusion 51,053008 (2011). A. Asle Zaeem et al "Aneutronic Fusion in Collision of Oppositely Directed Plasmoids" Plasma Physics...
their essences as a gift to Galactus. The Exolon are a race of parasitic plasmoid creatures created by Knull, that fed on the immortal souls of living beings...
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the detection of a large atmospheric magnetic bubble, also known as a plasmoid, released into outer space from the planet Uranus, after reevaluating old...
desktop and panel layouts composed of individual Widgets (also known as "Plasmoids") which can be individually configured, moved around, replaced with alternatives...
the detection of a large atmospheric magnetic bubble, also known as a plasmoid, released into outer space from the planet Uranus, after reevaluating old...
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In this well-known case, the cyclotron radiation is trapped inside the plasmoid and cannot escape, except from a very thin surface layer. While megatesla...
Bibcode:1999PhPl....6.1743J. doi:10.1063/1.873432. Ebrahimi, Fatima (20 May 2015). "Plasmoids Formation During Simulations of Coaxial Helicity Injection in the National...
_{ik}-\left(\varepsilon _{0}E_{i}E_{k}+{\frac {B_{i}B_{k}}{\mu _{0}}}\right).} A plasmoid is a finite configuration of magnetic fields and plasma. With the virial...