General Electric Company

Paul Shadforth Thompson

Evangelos Trifon Laskaris

Xianrui Huang

Bulent Aksel

Kathleen Melanie Amm

Michael Anthony Palmo, Jr

Johannes Martinus Van Oort

Michele Dollar Ogle

Minfeng Xu

William D Barber

Yu Wang

Kenneth Gordon Herd

Ernst Wolfgang Stautner

Timothy John Havens

Yan Zhao

Anbo Wu

Bruce Campbell Amm

Gregory Alan Lehmann

David Thomas Ryan

Liang Li

Bruce Alan Knudsen

Curtis Alan Johnson

Robert John Zabala

William A Edelstein

James William Bray

Sayed-Amr A El-Hamamsy

Thomas Robert Raber

Robert Adolph Ackermann

Robert Arvin Hedeen

Sergio Paulo Martins Loureiro

Judson Sloan Marte

Robert Michael Vavrek

David E Dean

Mark Lloyd Miller

Scott Thomas Mansell

Dewain Anthony Purgill

Richard Philip Mallozzi

John Peter Fura

Sylvia Marie Decarr

Mike James Radziun

Michael A Palmo

Xu Minfeng

Method for joining wires using low resistivity joints is provided. More specifically, methods of joining one or more wires having superconductive filaments, such as magnesium diboride filaments, are provided. The wires are joined by a low resistivity joint to form wires of a desired length for applications, such in medical imaging applications.

Methods for making low resistivity joints

A magnetizing coil unit and a method of making a magnetizing coil unit is provided. The coil includes a solenoid coil having a coiled copper sheet in which the width of the copper sheet is equal to the height of the solenoid coil. A magnetizing assembly includes a plurality of magnetizing coil units.

Method and apparatus for magnetizing a permanent magnet

A system and method for a magnetic resonance (MR) imaging system includes a coil form, at least one magnet positioned about the coil form and configured to generate a magnetic field, at least one gradient coil for manipulating the magnetic field generated by the at least one magnet by way of a gradient field, and a heat pipe thermally connected to the coil form and having a cryogen therein. The MR imaging system also includes a cryocooler connected to the heat pipe to cool the heat pipe and the cryogen, wherein the coil form is comprised of a thermally conductive material in which eddy currents are substantially reduced during operation of the at least one gradient coil. The present invention has been described in terms of the preferred embodiment, and it is recognized that equivalents, alternatives, and modifications, aside from those expressly stated, are possible and within the scope of the appending claims.

Heat pipe cooled suerconducting magnets with ceramic coil forms

A low eddy current cryogen circuit for superconducting magnets including at least a first cooling coil made of an electrically conducting material and having at least one electrical isolator incorporated in the first cooling coil. The electrical isolator is located to inhibit induced eddy current loops due to inductive coupling of the first cooling coil with eddy current inducing field sources.

Low eddy current cryogen circuit for superconducting magnets

A apparatus for low AC loss thermal shielding includes a plurality of thermally conducting fibers positioned along a desired direction of heat conduction. The fibers are electrically insulated from each other. The fibers are bonded together with a matrix, and a thermal link connects the bonded fibers to a cryogenic cold head.

Apparatus for low AC loss thermal shielding and method of making same

A cold mass for a superconducting magnet system in one example comprises a superconducting magnet, a cryogenic cooling circuit, and a magnet and cooling circuit support. The magnet and cooling circuit support comprises a substantially conductive coupler that serves to couple the superconducting magnet and the cryogenic cooling circuit. The cryogenic cooling circuit comprises an inlet path and a substantially upward outlet path. The inlet path avoids direct conductive thermal engagement with the substantially conductive coupler. The substantially upward outlet path comprises direct conductive thermal engagement with the substantially conductive coupler.

Cold mass cryogenic cooling circuit inlet path avoidance of direct conductive thermal engagement with substantially conductive coupler for superconducting magnet

A vacuum vessel assembly includes an inner cylinder and an outer cylinder formed of a material in which eddy currents are substantially not produced. The inner cylinder includes a first and second half having an annular flange thereon. A plurality of metal interfaces are connected to the inner cylinder and the outer cylinder. The plurality of metal interfaces bond the first half and second half of the inner cylinder and also bond the inner cylinder to the outer cylinder.

Low eddy current vacuum vessel and method of making same

A system and method for connecting superconducting magnet coils made up of coil segments to allow an integrated winding concept. The integrated winding concept can include serially connecting coil segments of coil pairs in an alternating pattern, which causes coil pairs to be electrically symmetric. Symmetric coil pairs can eliminate or significantly reduce the currents in magnet coils induced by gradient or other pulses, produce a homogenous field, and reduce the accumulated voltages in the coils due to gradient pulsing.

Apparatus and method for coupling coils in a superconducting magnet

Heat pipe cooled superconducting magnets with ceramic coil forms

A permanent magnet assembly for an imaging apparatus having a permanent magnet body having a first surface and a stepped second surface which is adapted to face an imaging volume of the imaging apparatus, wherein the stepped second surface contains at least four steps.

Multiple ring polefaceless permanent magnet and method of making

An electrical current lead assembly for ramping a superconducting magnet includes a vacuum vessel wall that has a first side exposed to an atmospheric pressure and a second side exposed to a vacuum pressure. A pool wall extends from the first side of the vacuum vessel wall and forms a dam region. A first conductor is affixed to and sealingly penetrates the vacuum vessel wall and has a first portion extending into the dam region. A second conductor is affixed to and sealingly penetrates the vacuum vessel wall and has a first portion extending into the dam region. A superconducting magnet on the second side of the vacuum vessel wall has a first low temperature superconducting (LTS) lead and a second LTS lead. A first superconductor electrically connects the first conductor to the first LTS lead, and a second superconductor electrically connecting the second conductor to the second LTS lead.

High temperature superconducting current leads for superconducting magnets

A cold mass for a superconducting magnet system in one example comprises a superconducting magnet, a cryogenic cooling circuit, and a magnet and cooling circuit support. The magnet and cooling circuit support comprises a substantially conductive coupler in a discrete path that serves to couple the superconducting magnet and the cryogenic cooling circuit.

Cold mass with discrete path substantially conductive coupler for superconducting magnet and cryogenic cooling circuit

An open magnetic resonance imaging (MRI) device is provided with at least one main coil for generating a magnetic field for imaging a volume, and at least one shaping coil. The at least one shaping coil is positioned relative to the at least one main coil to shape the magnetic field in the volume.

Cold mass support structure and helium vessel of actively shielded high field open MRI magnets

Growing community of inventors

Stephentown, NY, United States of America

Paul Shadforth Thompson