Electricity: magnetically operated switches – magnets – and electr – Magnets and electromagnets – Electron or ion beam deflecting type
Patent
1986-10-30
1989-01-24
Harris, George
Electricity: magnetically operated switches, magnets, and electr
Magnets and electromagnets
Electron or ion beam deflecting type
335284, H01F 700
Patent
active
048003530
ABSTRACT:
Micropole undulators for use in the generation of x-rays from moving charged particles and methods for manufacturing such undulators are disclosed.
One type of micropole undulator has two jaws containing rows of spaced apart poles arranged so that each pole produces a magnetic field aligned with all other similar fields. An external biasing field extends through the jaws so that an overall undulator field of substantially sinusoidal shape and substantially zero average value extends along the undulator axis. Preferably, the poles are bars formed of a magnetizable, but unmagnetized, material so that, after the jaws are assembled, all of the bars can be magnetized simultaneously in a uniform magnetic field of suitable strength.
Another type of micropole undulator incorporates two parallel layers which have been magnetized to provide rows of alternating magnetic fields extending in opposite directions, the layers being positioned between the pole faces of a highly magnetically permeable material with the south poles of one layer opposite the north poles of the other. Poles in the layers are formed by subjecting successive regions of each layer to oppositely directed and suitably varied magnetizing forces.
REFERENCES:
patent: 2722617 (1955-11-01), Cluwen et al.
patent: 3127544 (1964-03-01), Blume
Ramian et al., "Micro-Undulator Fels", Nuclear Instr. & Meth., A250:125-133 (1986).
Halbach, "Design of Permanent Multipole Magnets with Oriented Rare Earth Cobalt Material", Nuclear Instr. & Meth., 169:1-10 (1980).
Ramian et al., "Micro-Undulator Fels", Nuclear Instr. & Meth., A250:125-133 (1986).
Winick et al., "Wiggler Magnets at SSRL-Present Experience and Future Plans", Nuclear Instr. & Meth., 172:45-53 (1980).
Csonka Paul L.
Tatchyn Roman O.
Harris George
The State of Oregon Acting by and through the State Board of Hig
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