Field Effects

E.i. Dupont De Nemours and Company

Chrysler Corporation

Daimlerchrysler Corporation

Varian Associates, Inc.

New England Nuclear Corporation

Ronald F Holsinger

Robert L Gluckstern

Gary M Colello

Clifford T Gunsallus

Michael E Mack

John R Oleksy

Robert R Lown

John C Fisher

The present invention is a methodology for assembling a magnet onto a rotor for an energy storage apparatus. The methodology includes the step of mounting a magnet onto a mandrel. The methodology also includes the step of turning an outer diameter of the magnet to a predetermined size. The methodology further includes the step of turning a rim section of the rotor for receiving the magnet to a predetermined size. The methodology still further includes the step of attaching the magnet to the rim section. The methodology includes the step of removing the mandrel.

Assembly process of magnet onto a rotor

The present invention is an a rotor. The rotor includes a rim portion, divided into a first rim section and a second rim section. The first rim section includes a soft magnet positioned on it. The second rim section includes a mass positioned on it with similar density to the magnet to generate equivalent centrifugal forces along a spin axis. A carbon fiber overwrap encloses the rim.

Soft magnet for a rotor

A magnetically suppressed Faraday system for use in an ion beam treatment system, such as an ion implanter, includes a Faraday cage defining a chamber having an entrance, and a magnetic suppression assembly positioned at the entrance of the chamber. The downstream end of the Faraday cage is positioned adjacent to a workpiece such as a semiconductor wafer. The magnetic suppression assembly includes a suppression magnet structure for producing suppression magnetic fields of sufficient strength to inhibit escape of electrons from the chamber, a field cancellation magnet structure for producing cancellation magnetic fields for substantially canceling magnetic fields, produced by other magnets in the magnetic suppression assembly, near the downstream end of the chamber, and an angle correction magnet structure for producing angle correction magnetic fields selected such that the ion beam is subjected to zero or nearly zero net angular deflection as it passes through the Faraday system.

Zero deflection magnetically-suppressed Faraday for ion implanters

NMR bias magnet apparatus employing permanent magnets and methods therefor are provided in accordance with the teachings of the present invention. According to the present invention a plurality of insulating sleeves which may be rotated are disposed about the periphery of a structure having a curvilinear cross section such as a cylinder. Each of the plurality of insulating sleeves are filled with stacks of slabs of permanent magnet material forming slugs and having an anisotropic axis of magnetic orientation aligned at an azimuth corresponding to a=2.phi.. The length of slug sections or even of individual slabs within each sleeve may be varied for purposes of introducing desired harmonics, as may the manner in which each sleeve is filled, so long as quadrature symmetry is maintained.

Cylindrical NMR bias magnet apparatus employing permanent magnets and

An NMR imaging apparatus is described having a desired imaging volume for imaging of biological tissue, said apparatus comprising bias means for generating a bias field, means for generating gradient fields, and radio frequency means for applying a pulse of electromagnetic radiation to the biological tissue and for detecting the resultant signals emitted from said tissue; wherein said bias means comprises a plurality of dipole ring magnets, each dipole ring magnet comprising a plurality of segments, each segment comprising an oriented, anisotropic permanent magnet material arranged in a ring so that there is a substantially continuous ring of permanent magnet material.

Permanent magnet NMR imaging apparatus

A segmented permanent ring magnet which is tunable to provide a preselected transverse magnetic field within the magnet interior is disclosed. The permanent magnet is constructed of material which has essentially linear behavior in the second quadrant of the B-H curve. The invention includes a method of tuning a segmented permanent ring magnet and a method of manufacture for the blocks of magnetic material which make up the magnet. The magnets of the present invention are particularly adapted for use as bias magnets in NMR imaging systems.

Tunable segmented ring magnet and method of manufacture

An adjustable strength multipole permanent magnet is disclosed that comprises a plurality of axial layers of magnetic material wherein one layer can be angularly displaced with respect to an adjacent layer, each of said axial layers comprising a plurality of segments comprising an oriented, anisotropic,, permanent magnet material arranged in a ring, each segment having a predetermined easy axis orientation that is preferably determined by the formula:

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Carlisle, MA, United States of America

Ronald F Holsinger