Superconducting magnets in the interaction region of the KEK B-Factory

Conference · Fri Jul 01 04:00:00 EDT 1994 · IEEE Transactions on Magnetics (Institute of Electrical and Electronics Engineers); (United States)

OSTI ID:6489453

Tsuchiya, K; Kobayashi, T M; Haruyama, T; Ajima, Y; Doi, Y ^[1]; Kimura, A ^[2]

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1. National Lab. for High Energy Physics, Ibaraki (Japan)
2. Graduate Univ. for Advanced Studies, Ibaraki (Japan)

The interaction region of the KEK B-Factory requires four superconducting magnets (two dipoles and two quadrupoles). Due to their detrimental effect on the experimental detector, the leakage field of the magnets needs to ba as small as possible. For achieving this smaller leakage field, the authors have designed special iron-free dipoles with an active shield cell. Due to the active shield method, the stray field of the magnets is suppressed to a level of 10 mT outside the radius of A25m. The quadrupoles are also iron-free magnets, but have no shield coil. This paper presents the results of the two- and three-dimensional electromagnetic studies along with the structure of these magnets.

• OSTI ID: 6489453
• Report Number(s): CONF-930926--
• Conference Information: Journal Name: IEEE Transactions on Magnetics (Institute of Electrical and Electronics Engineers); (United States) Journal Volume: 30:4Pt2
• Country of Publication: United States
• Language: English

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