Per Carlqvist
Per Carlqvist (born July 25, 1938, in Stockholm, Sweden) is a Swedish plasma physicist with an interest in astrophysical applications.[1] In 1963, he received the degree of civilingenjör from the Royal Institute of Technology, Stockholm; in 1970, the Tekn. lic.; and in 1980 the Tekn. D.
He is currently affiliated with the Royal Institute of Technology, Stockholm, at the School of Electrical Engineering in the department of Space & Plasma Physics.[2]
He is the author of several papers on astrophysical plasmas, from the formation of stars, double layers, the Bennett Pinch, to interstellar helical filaments.
The Carlqvist Relation
[edit]Carlqvist lends his name to the "Carlqvist Relation",[3] a formula used in plasma physics to describe how an electrically conducting plasma filament is compressed by magnetic forces to form a "plasma pinch". Carlqvist noted that by using his relation, and a derivative, it is possible to describe the Bennett pinch, the Jeans criterion (for gravitational instability,[4] in one and two dimensions), force-free magnetic fields, gravitationally balanced magnetic pressures, and continuous transitions between these states.[5]
Notes
[edit]- ^ Biographical information from: Carlqvist, Per; Gahm, Gosta F., "Manifestations of electric currents in interstellar molecular cloud" (1992) IEEE Transactions on Plasma Science (ISSN 0093-3813), vol. 20, no. 6, p. 867-873.
- ^ Web page of Per Calqvist
- ^ Gerrit L. Verschuur, "Interstellar neutral hydrogen filaments at high galactic latitudes and the bennett pinch" (1995) Volume 227, Numbers 1-2 / May, 1995
- ^ J. H. Jeans, "The stability of a spherical nebula" Phil. Trans. R. Soc. Lond. A 199 (1902)
- ^ Carlqvist, Per, "Cosmic electric currents and the generalized Bennett relation" (1988) Astrophysics and Space Science (ISSN 0004-640X), vol. 144, no. 1-2, May 1988, p. 73-84
External links
[edit]- Articles on NASA Astrophysics Data System (ADS) by Per Carlqvist
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