Abstract: A magnetic structure fabricated of magnetically rigid materials combines a adial magnetic field source with an axial magnetic field source to produce a conical field source. The radial magnetic field source typically comprises a substantially annular enclosed cavity with an internal magnetic field oriented perpendicular to the annular axis of the cavity. The axial magnetic field source most likely comprises a substantially cylindrical enclosed cavity with an internal magnetic field oriented parallel to the cylindrical axis of the cavity.

Abstract: A permanent magnet structure comprises a flux source having a central cav wherein a highly uniform magnetic field is produced of radial orientation. The flux source comprises a pair of radially magnetized discs of MR material. The discs are coaxially aligned parallel to and separated from each other a given distance. A ring fabricated of passive ferromagnetic material circumscribes the peripheries of the discs, and cladding magnets cover the planar exterior surface of each disc.

Abstract: The invention disclosed herein is a permanent magnet structure which is uul in focusing or guiding charged particle beams, such as those employed in traveling wave tubes, wigglers and undulators. The magnets are annular or planar in shape and have a cross-sectional configuration which is triangular in shape. The cross section forming the triangular magnet sections is that plane which contains the linear beam path and intersects the magnets. The magnetizations of the magnets are oriented perpendicular to the magnetizations of adjacent magnets such that no magnetic poles exist on the outer surface of the permanent magnetic structure.

Abstract: A permanent magnet structure comprising a linear array of hollow cylindrical flux source structures nested one within another about a common central axis. Each HCFS structure is free to displace linearly parallel to the central axis or to rotate about the axis. The array may be arranged by appropriate mechanical adjustment to provide periodic magnetic structures suitable for use as a wiggler or a twister.

Abstract: The fabrication of a flux source using magnetically rigid material is dissed for deriving a magnetic field of uniform density and enhanced magnitude within an enclosed cylindrical cavity thereof. In the preferred embodiments, segments of the magnetically rigid material are configured and arranged in the flux source to direct the magnetic field in parallel with the cyindrical axis of the cavity.

Abstract: A nuclear magnetic resonance device for use in diagnostic procedures on the uman body is provided and comprises longitudinally extending cylindrical or rectangular crossectioned rare earths permanent magnets provided with cladding magnets extending longitudinally therewith and providing flux control for the establishment of a uniform flux field. Bucking magnets and other supplemental magnetic elements are provided to as precisely as possible control the magnetic flux field effected for the diagnostic procedures.

Abstract: Superconducting persistent current rings are mass produced by passing each uperconducting ring through a tapered magnetic field that is tapered in strength so that when each ring passes through the maximum magnetic field of the tapered magnetic field which is above the critical field of the tapered magnetic field the superconducting ring becomes normal thereby admitting all of the flux to which its cross section is exposed. When the ring is passed to a region of field lower in strength than the critical field, the ring becomes superconducting again and traps the flux to which its cross section is exposed.

Abstract: A passive ferromagnetic material is transformed into a permanent magnet with more than double the existing energy product or "strength" by encasing a bar of the passive ferromagnetic material in an annular shell of superconductive material at a temperature above the transition temperature of the superconductive material, placing the encased ferromagnetic material into an axial magnetic field providing sufficient oersteds to magnetize the passive ferromagnetic material thereby enclosing a large amount of flux in the superconducting shell, lowering the temperature to below the transition temperature of the superconductive material whereupon all of the enclosed flux is permanently trapped, and removing the axial magnetic field.

Abstract: A hollow cylindrical flux source (HCFS) is formed into a toroidal shape. A hollow toroid of magnetically neutral material is mounted in the central cavity of the toroidal flux source. The hollow toroid has a central coaxial toroidal cavity of given cross-section (e.g., rectangular). The toroid flux source and the hollow toroid are each equatorially split into two halves. When the two halves are brought into juxtaposition and a suspension of magnetic material is deposited in the coaxial toroidal cavity a permanent magnet toroidal ring will be fabricated.

Abstract: A ferromagnet material having a high permeability and saturation magnetizon at low temperatures is used to induce superconducting currents in a ring of a superconducting material where the ferromagnet material has a lower transition temperature than the superconductive material.

Abstract: A permanent magnet structure comprising one or more truncated hollow cyliical flux source (HCFS) segments with the end faces of each segment covered by superconducting sheets. In the case of a plurality of axially aligned segments, the array may be arranged to provide a periodic magnet structure suitable for use in a wiggler.

Abstract: Periodic permanent magnet structures comprise a plurality of paired axially ligned sections of hollow spherical flux sources each of which produces a uniform high-field in its central cavity. Each pair of sections is mounted on opposite sides of a respective plate of permeable material. The magnetic field orientations in the central cavities are axially directed and alternate or reverse in direction from section to section. An axial bore hole drilled through the sections and plates provides a continuous channel or path through which a beam of charged particles will travel.

Abstract: Periodic permanent magnet structures comprise a plurality of paired axially ligned segments of transversely sliced or truncated hollow cylindrical flux sources each of which produces a uniform high-field in its central cavity. Each pair of segments is mounted on opposite sides of a respective plate of permeable material. The magnetic field orientations in the central cavities are axially directed and alternate or reverse in direction from segment to segment. An axial bore hole drilled through the segments and plates provides a continuous channel or path through which a beam of charged particles will travel.

Abstract: An azimuthally circumscribed section of a hollow hemispherical magnetic flux source (i.e., a quarter-spherical or one eighth-spherical structure) has a superconducting planar sheet abutting one flat face of the section and, at least, a second planar sheet of selected material (e.g., paramagnetic or diamagnetic) abutting another flat face of the section and perpendicular to the first sheet. The magnetic "mirror" image of the magnetic section in the diamagnetic (superconductor) plane and the virtual (anti-mirror and/or mirror) image(s) in the other perpendicular plane(s) makes the central cavity appear (magnetically) exactly as if a complete "magic sphere" were its source. The central or working cavity is readily accessible through a hole in the first or second planar sheet.

Abstract: A permanent magnet structure comprising multiple hollow substantially cylrical flux sources embedded one within another about an axially extending center passage such that each flux source is free to rotate in either direction by any desired angular magnitude independent of the motion of the other(s). In the case of a plurality of axially aligned truncated HCFS structures, the array may be arranged to provide a periodic magnetic Structure suitable for use in a wiggler, or with a helical locus suitable for use in a twister.

Abstract: Periodic permanent magnet structures comprise a plurality of segments of nsversely sliced or truncated hollow cylindrical flux sources each of which produces a uniform high-field in its central cavity. Each flux source has an axial tunnel through its magnetic poles. The sources are arranged linearly with adjacent flux sources in peripheral edge contact with their magnetic fields in alignment so as to form a continuous channel through which a beam of charged particles can travel. Superconducting sheets cover the end faces of each of the sliced flux sources.

Abstract: A periodic permanent magnet stack comprises a plurality of aligned, juxtaed, hollow hemispherical flux sources each of which produces a uniform high-field in its hemispherical central cavity. The magnetic field orientations in the central cavities are axially directed and alternate or reverse in direction from hemisphere to hemisphere. An axial bore hole through the stack provides a continuous channel or path through which a beam of charged particles will travel.

Abstract: A tetrahedral junction waveguide switch is provided having two axially juxtaposed sections of hollow rectangular waveguide which are mutually cross-polarized by being rotated 90 degrees with respect to each other. A rod of a ferrite material having gyromagnetic properties is axially disposed within the juxtaposed ends of the waveguide sections and is selectively axially magnetized to control transmission of RF electromagnetic wave energy through the sections. A permanent magnet structure having a unique cladding arrangement which minimizes flux leakage and produces a magnet of high coercive force is employed to produce a unidirectional magnetic bias field along the longitudinal axis of the rod to keep the switch in a low loss transmission state by virtue of Reggia-Spencer effect signal rotation. A selectively operable helical coil is utilized to produce another axial magnetic field which nullifies the bias magnetic field when it is desired to place the switch in a high loss or cut-off transmission state.

Abstract: A linear array of clad truncated magic ring segments. Each segment has an entrance and exit hole in its respective cladding magnets. The individual segments are arranged to provide a periodic permanent magnet structure suitable for use in a wiggler or a twister.

Abstract: Permanent magnet structures are fabricated from a plurality of hollow cylrical flux sources, the sources displaced radially from each other progressively along the structures' elongate axes so as to produce a heliform magnetic field extending centrally in a passage through the structures. Superconducting plates are interspersed between adjacent flux sources and also cover the end faces of the array.