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Phys. Rev. Lett. 83, 1946–1949 (1999)

Supershielding: Confinement of Magnetic Fields

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Robert W. Brown and Shmaryu M. Shvartsman
Department of Physics, Case Western Reserve University, Cleveland, Ohio 44106-7079

Received 5 March 1999; revised 4 August 1999; published in the issue dated 6 September 1999

See accompanying Physics Focus

In open-shield systems, we have derived current conditions that lead to remarkable magnetic-field confinement, which we call “supershielding.” The freedom to vary both primary and shield currents is important in solving the conditions. Solutions leading to very effective shielding are illustrated by the simple system of two parallel flat strips. Generalizations include other geometries, internal shielding, and electric-field confinement. An industrial coil design serves as a reference for practical issues. We discuss mathematical limits, via a “seesaw” approach, to “perfect shielding.”

© 1999 The American Physical Society

URL:
http://link.aps.org/doi/10.1103/PhysRevLett.83.1946
DOI:
10.1103/PhysRevLett.83.1946
PACS:
41.20.Gz
 
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