Compact magnetic module for periodic magnetic devices
AssigneeIntermagnetics General Corporation
InventorPaul Domigan
Life of this patent
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Abstract
A magnetic array for periodic magnetic devices is formed as a series of pole modules each constructed from rectangular components. Field strengths in excess of 2.0 T are achieved by surrounding each pole module on all available sides with magnet blocks. Less magnet material is used than in prior modules that produced equal field strengths and magnet material is more efficiently used by reducing the material scrap associated with manufacture of prior art pole and magnet designs.
Claims18
A magnetic module for use in periodic magnetic devices, for example, wigglers, undulators, synchrotrons, magnetic separators, free electron lasers, said magnetic module comprising:
- a central pole of a high magnetic permeability material formed with an inner end portion, an outer end portion and side portions located between said inner end portion and said outer end portion;
- first permanent magnet means surrounding said central pole around at least a portion of said side portions, said first permanent magnet means having first opposed side portions and second opposed side portions, said outer end portion of said pole extending outwardly past said first opposed side portions of said first permanent magnet means, and said second opposed side portions of said first permanent magnet means extending outwardly past said outer end portion of said pole;
- and
- second permanent magnet means disposed on said outer end portion of said pole.
A magnetic module for use in periodic magnetic devices, for example, wigglers, undulators, synchrotrons, magnetic separators, free electron lasers, said magnetic module comprising:
- a central pole of a high magnetic permeability material formed with an inner end portion, an outer end portion and side portions located between said inner end portion and said outer end portion;
- first permanent magnet means surrounding said central pole around and directly contacting each of said side portions;
- and
- second permanent magnet means disposed on said outer end portion of said pole,
- wherein said side portions of said pole have a plurality of planar side surfaces and said first permanent magnet means includes a plurality of magnets respectively disposed on each of said plurality of planar side surfaces, said inner end portion being entirely unobstructed by permanent magnet means.
A magnetic apparatus for use in periodic magnetic devices, for example, wigglers, undulators, synchrotrons, magnetic separators, free electron lasers, said apparatus comprising:
- a first magnetic array comprising a plurality of first magnetic modules aligned in a first series;
- a second magnetic array aligned with said first magnetic array and comprising a plurality of second magnetic modules aligned in a second series;
- said first and second magnetic arrays defining a gap therebetween for the passage of charged particles therethrough;
- said first and second magnetic modules each comprising a central pole of a high magnetic permeability material having an inner end portion defining said gap, an outer end portion extending away from said gap, and side portions located between said inner and outer end portions;
- and
- permanent magnet means disposed on at least some of said side portions and on said outer end portion of said central pole,
- said central pole including a first rectangular block and said permanent magnet means including five rectangular blocks.
A magnetic apparatus for use in periodic magnetic devices, for example, wigglers, undulators, synchrotrons, magnetic separators, free electron lasers, said module comprising:
- a first magnetic array comprising a plurality of first magnetic modules aligned in a first series;
- a second magnetic array aligned with said first magnetic array and comprising a plurality of second magnetic modules aligned in a second series;
- said first and second magnetic arrays defining a gap there-between for the passage of charged particles there through;
- said first and second magnetic modules each comprising a central pole of a high magnetic permeability material having an inner end portion defining said gap, an outer end portion extending away from said gap, and side portions located between said inner and outer end portions;
- and
- permanent magnet means disposed on at least some of said side portions and on said outer end portion of said central pole.
- wherein pole width is approximately 1.4 times larger than pole thickness.
Dependencies are inferred from the claim text.