Abstract: An undulator includes a periodic arrangement of magnets to produce a periodic spatial magnetic field distribution in a magnetic gap defined by the magnets. The undulator further includes a temperature-compensating material selectively arranged to compensate for a temperature-dependent change in the magnetic field of the undulator. The change may be in the strength of the magnetic field, or in the position of the magnetic field centerline. According to one aspect of the invention, the temperature-compensating material is movably arranged, so as to fine tune its compensation effect after it is initially arranged. Alternatively or additionally, the amount of temperature-compensating material may be adjusted to fine tune its compensation effect after it is initially arranged.

Abstract: A magnetic sector for charged particle beam transport that includes a magnetic field profile that achieves a linear dispersion from a collimated beam of charged particles proportional to their mass-energy-to-charge ratio. In one embodiment, the field profile necessary for the linear dispersion is obtained by the use of shaped, highly permeable poles powered by permanent magnets or electromagnetic coils.

Abstract: A magnetic sector for charged particle beam transport that includes a magnetic field profile that achieves a linear dispersion from a collimated beam of charged particles proportional to their mass-energy-to-charge ratio. In one embodiment, the field profile necessary for the linear dispersion is obtained by the use of shaped, highly permeable poles powered by permanent magnets or electromagnetic coils.

Abstract: A multipole beamline magnet (10) includes a plurality of stationary poles (12) formed of ferromagnetic material and one or more permanent magnets (14) that are disposed between the plurality of stationary poles. Each of the permanent magnets supplies magnetomotive force to two adjacent stationary poles, so that the poles produce a magnetic field in a central space (16) defined by the poles. A mechanical axis (18) of the beamline magnet is defined to extend through the central space, perpendicularly to the plane defined by the poles and the magnets. The beamline magnet further includes a linear drive (20) that is adapted to move the permanent magnet(s) perpendicularly to the mechanical axis. Thus constructed, the beamline magnet produces a high-quality field using its stationary poles, and further allows for selective adjustment of the magnetic field strength and the magnetic centerline by collectively or selectively moving the permanent magnets.

Abstract: A magnetic sector for charged particle beam transport that includes a magnetic field profile that achieves a linear dispersion from a collimated beam of charged particles proportional to their mass-energy-to-charge ratio. In one embodiment, the field profile necessary for the linear dispersion is obtained by the use of shaped, highly permeable poles powered by permanent magnets or electromagnetic coils.

Abstract: A multipole beamline magnet (10) includes a plurality of stationary poles (12) formed of ferromagnetic material and one or more permanent magnets (14) that are disposed between the plurality of stationary poles. Each of the permanent magnets supplies magnetomotive force to two adjacent stationary poles, so that the poles produce a magnetic field in a central space (16) defined by the poles. A mechanical axis (18) of the beamline magnet is defined to extend through the central space, perpendicularly to the plane defined by the poles and the magnets. The beamline magnet further includes a linear drive (20) that is adapted to move the permanent magnet(s) perpendicularly to the mechanical axis. Thus constructed, the beamline magnet produces a high-quality field using its stationary poles, and further allows for selective adjustment of the magnetic field strength and the magnetic centerline by collectively or selectively moving the permanent magnets.

Abstract: A magnetic sector for charged particle beam transport that includes a magnetic field profile that achieves a linear dispersion from a collimated beam of charged particles proportional to their mass-energy-to-charge ratio. In one embodiment, the field profile necessary for the linear dispersion is obtained by the use of shaped, highly permeable poles powered by permanent magnets or electromagnetic coils.

Abstract: Deviations between the actual electromagnetic field induced by a wiggler and a desired induced field are computed. Then the effect of adding shims at each position within the wiggler are determined and thicknesses of appropriate shims calculated to reduce the overall error of the resulting induced magnetic field from the desired magnetic field.

Abstract: A method of emission tomography using a gamma camera and a rotating collimator having an array of a large number of slanted, small diameter holes. A planar projection corresponding to each angular orientation assumed by the collimator is recorded. From these series of planar projections, a three-dimensional simulation model is reconstructed by an iterative algorithm which approximates the emitting object. The simulated model comprises multiple separable planes.