Magnetic guns with cylindrical permanent magnets

Publication: Research - peer-reviewJournal article – Annual report year: 2012

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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.
Original languageEnglish
JournalJournal of Magnetism and Magnetic Materials
Publication date2012
Volume324
Journal number9
Pages1715-1719
Number of pages5
ISSN0304-8853
DOIs
StatePublished
CitationsWeb of Science® Times Cited: 1

Keywords

  • Earnshaw’s theorem, Magnetic gun, Magnetostatic interaction, Permanent magnet, Cylindrical magnet
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