초록 ▼

Planar permanent magnet edge-field quadrupoles for use in particle accelerating machines and in insertion devices designed to generate spontaneous or coherent radiation from moving charged particles are disclosed. The invention comprises four magnetized rectangular pieces of permanent magnet materia

Planar permanent magnet edge-field quadrupoles for use in particle accelerating machines and in insertion devices designed to generate spontaneous or coherent radiation from moving charged particles are disclosed. The invention comprises four magnetized rectangular pieces of permanent magnet material with substantially similar dimensions arranged into two planar arrays situated to generate a field with a substantially dominant quadrupole component in regions close to the device axis.

대표청구항 ▼

A planar permanent magnet edge-field quadrupole for modifying the trajectory of an electrically or magnetically charged particle traveling along in a substantially linear trajectory that is in close proximity to the quadrupole symmetry axis, the planar permanent magnet edge-field quadrupole comprisi

A planar permanent magnet edge-field quadrupole for modifying the trajectory of an electrically or magnetically charged particle traveling along in a substantially linear trajectory that is in close proximity to the quadrupole symmetry axis, the planar permanent magnet edge-field quadrupole comprising: four substantially rectangular magnetized pieces of permanent magnet material with substantially similar geometrical and dimensional parameters, each piece magnetized to a substantially similar level of magnetic field strength in a direction perpendicular to two of its opposed surfaces and substantially perpendicular to the axis of particle motion; and the four pieces configured into two planar arrays of two pieces each, with the arrays located at an equal distance above and below the axis of particle motion, with one planar array parallel to and directly above the other; and the two adjacent pieces in each planar array magnetized in a direction perpendicular to the plane of the array, with the sense of magnetization of the piece on the left opposite to the sense of magnetization of the other piece; and the sense of magnetization of each piece in the top array being the same as the sense of magnetization of the piece directly below it; and the two adjacent pieces in each planar array separated by a horizontal gap of the same size, the size of the gaps being adjustable from arbitrary positive values down to zero; and in combination, each piece on the left hand side of the planar permanent magnet quadrupole provided with a means for adjusting the horizontal gap relative to the right hand piece in the same planar array: and the dimensions, positions, and magnetizations of the pieces producing a field distribution that is substantially quadrupolar out to a distance away from the symmetry axis that is intermediate between zero and approximately one half of the full vertical gap size.