Electricity: magnetically operated switches – magnets – and electr – Magnets and electromagnets – Magnet structure or material
Patent
1995-10-24
1996-11-19
Brown, Brian W.
Electricity: magnetically operated switches, magnets, and electr
Magnets and electromagnets
Magnet structure or material
H01F 702
Patent
active
055766790
ABSTRACT:
The invention provides a cylindrical permanent magnet unit suitable for application to gyrotrons. Essentially the magnet unit consists of two cylindrical permanent magnets which are coaxially aligned, and there is a space between the two cylindrical magnets. Each of the two cylindrical magnet is a coaxially juxtaposed assembly of a plurality of ring-like permanent magnets, and each ring-like magnet is constructed of a plurality of permanent magnet segments. In one of the two cylindrical magnets every ring-like permanent magnet is magnetized in radial directions from the inside toward the outside, and in the other every ring-like permanent magnet is magnetized in radial directions from the outside toward the inside. In the bore of the cylindrical magnet unit the magnetic field is in the direction of the longitudinal center axis of the bore. By virtue of the space between the two cylindrical magnets, the distribution of flux density in the direction of the center axis becomes flat in a middle section of the bore. A ring-like member of a nonmagnetic material may be inserted in the aforementioned space.
REFERENCES:
patent: 3237059 (1966-02-01), Meyerer
patent: 4703276 (1987-10-01), Beer
patent: 4720692 (1988-01-01), Jin
patent: 5014032 (1991-05-01), Aubert
patent: 5148138 (1992-09-01), Miyata
Kikunaga Toshiyuki
Ohashi Ken
Takada Takeo
Barrera Raymond M.
Brown Brian W.
Mitsubishi Denki & Kabushiki Kaisha
Shin-Etsu Chemical Co. , Ltd.
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