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Magnetic guns with cylindrical permanent magnets
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SYSNO ASEP 0380977 Document Type J - Journal Article R&D Document Type Journal Article Subsidiary J Článek ve WOS Title Magnetic guns with cylindrical permanent magnets Author(s) Vokoun, David (FZU-D) RID, ORCID
Beleggia, M. (DK)
Heller, Luděk (FZU-D) RID, ORCIDSource Title Journal of Magnetism and Magnetic Materials. - : Elsevier - ISSN 0304-8853
Roč. 324, č. 9 (2012), s. 1715-1719Number of pages 5 s. Language eng - English Country NL - Netherlands Keywords permanent magnet ; cylindrical magnet ; Earnshaw's theorem ; magnetic gun ; magnetostatic interaction Subject RIV BM - Solid Matter Physics ; Magnetism R&D Projects GAP107/11/0391 GA ČR - Czech Science Foundation (CSF) IAA100100920 GA AV ČR - Academy of Sciences of the Czech Republic (AV ČR) CEZ AV0Z10100520 - FZU-D (2005-2011) UT WOS 000299542300010 DOI https://doi.org/10.1016/j.jmmm.2011.12.026 Annotation The motion of a cylindrical permanent magnet (projectile) inside a tubular permanent magnet, with both magnets magnetized axially, illustrates nicely the physical principles behind the operation of magnetic guns. The force acting upon the projectile is expressed semi-analytically as derivative of the magnetostatic interaction energy. For comparison, the forces involved are also calculated numerically using finite elements methods. Based on the conservation of the magnetostatic and kinetic energies, the exit and asymptotic velocities are determined. The derived formulas can be used to optimize the generated forces and motion of the inner cylindrical magnet. Workplace Institute of Physics Contact Kristina Potocká, potocka@fzu.cz, Tel.: 220 318 579 Year of Publishing 2013
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