Patents by Inventor Yukikazu Iwasa

Yukikazu Iwasa has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).

  • Patent number: 10804018
    Abstract: The present invention is a superconducting partial insulation magnet and a method for providing the same. The magnet includes a coil with a non-insulated superconducting wire winding wound around a bobbin. The coil has a first wire layer, a second wire layer substantially surrounding the first layer, and a first layer of insulating material disposed between the first wire layer and the second wire layer. Each wire layer comprises a plurality of turns, and the first layer of insulating material substantially insulates the second wire layer from the first wire layer.
    Type: Grant
    Filed: September 21, 2017
    Date of Patent: October 13, 2020
    Assignee: Massachusetts Institute of Technology
    Inventors: Seungyong Hahn, YoungJae Kim, John Peter Voccio, Juan Bascunan, Yukikazu Iwasa
  • Patent number: 10580573
    Abstract: A superconducting magnet and method for making a superconducting magnet are presented. The superconducting magnet is made by forming a coil from windings of a first wire comprising a reacted MgB2 monofilament, filling a cavity of a stainless steel billet with a Mg+B powder. Monofilament ends of the first wire and a similar second wire are sheared at an acute angle and inserted into the billet. A copper plug configured to partially fill the billet cavity is inserted into the billet cavity. A portion of the billet adjacent to the plug and the wires is sealed with a ceramic paste.
    Type: Grant
    Filed: March 13, 2017
    Date of Patent: March 3, 2020
    Assignee: Massachusetts Institute of Technology
    Inventors: Seungyong Hahn, Yukikazu Iwasa, Juan Bascunan, John Peter Voccio, Jiayin Ling, Jungbin Song, YoungJae Kim
  • Patent number: 10079092
    Abstract: High-temperature superconducting (HTS) devices and methods are disclosed. An HTS cable subassembly has a rectangular shaped cross section. The subassembly includes a stack of tapes formed of a superconducting material, and a cable subassembly wrapper wrapped around the stack of tapes. The tapes in the stack are slidably arranged in a parallel fashion. A cable assembly is formed of a cable assembly wrapper formed of a second non-superconducting material disposed around an n×m array of cable subassemblies. Within a cable assembly, a first cable subassembly of the array of subassemblies is oriented substantially perpendicular to a second cable subassembly with regard to the plurality of tapes. A compound-cable assembly is formed by joining two or more cable assemblies. A high-temperature superconducting magnet is formed of a solenoidal magnet as well as dipole and quadrupole magnets wound of a cable subassembly, a cable assembly, and/or a compound cable assembly.
    Type: Grant
    Filed: November 25, 2015
    Date of Patent: September 18, 2018
    Assignee: Massachusetts Institute of Technology
    Inventors: Yukikazu Iwasa, Juan Bascuñán, Seungyong Hahn
  • Patent number: 10062485
    Abstract: High-temperature superconducting (HTS) devices and methods are disclosed. An HTS cable subassembly has a rectangular shaped cross section. The subassembly includes a stack of tapes formed of a superconducting material, and a cable subassembly wrapper wrapped around the stack of tapes. The tapes in the stack are slidably arranged in a parallel fashion. A cable assembly is formed of a cable assembly wrapper formed of a second non-superconducting material disposed around an n×m array of cable subassemblies. A compound cable assembly is formed by joining two or more cable assemblies. A high temperature superconducting magnet is formed of a solenoidal magnet formed of a cable subassembly, a cable assembly, and/or a compound cable assembly.
    Type: Grant
    Filed: February 12, 2015
    Date of Patent: August 28, 2018
    Assignee: Massachusetts Institute of Technology
    Inventors: Yukikazu Iwasa, Juan Bascuñán, Seungyong Hahn
  • Patent number: 9799435
    Abstract: The present invention is a superconducting partial insulation magnet and a method for providing the same. The magnet includes a coil with a non-insulated superconducting wire winding wound around a bobbin. The coil has a first wire layer, a second wire layer substantially surrounding the first layer, and a first layer of insulating material disposed between the first wire layer and the second wire layer. Each wire layer comprises a plurality of turns, and the first layer of insulating material substantially insulates the second wire layer from the first wire layer.
    Type: Grant
    Filed: April 5, 2016
    Date of Patent: October 24, 2017
    Assignee: Massachusetts Institute of Technology
    Inventors: Seungyong Hahn, YoungJae Kim, John Peter Voccio, Juan Bascunan, Yukikazu Iwasa
  • Patent number: 9627119
    Abstract: A superconducting magnet and method for making a superconducting magnet, are presented. The superconducting magnet is made by forming a coil from windings of a first wire comprising a reacted MgB2 monofilament, filling a cavity of a stainless steel billet with a Mg+B powder. Monofilament ends of the first wire and a similar second wire are sheared at an acute angle and inserted into the billet. A copper plug configured to partially fill the billet cavity is inserted into the billet cavity. A portion of the billet adjacent to the plug and the wires is sealed with a ceramic paste.
    Type: Grant
    Filed: July 14, 2014
    Date of Patent: April 18, 2017
    Assignee: Massachusetts Institure of Technology
    Inventors: Seungyong Hahn, Yukikazu Iwasa, Juan Bascunan, John Peter Voccio, Jiayin Ling, Jungbin Song, YoungJae Kim
  • Publication number: 20160240286
    Abstract: High-temperature superconducting (HTS) devices and methods are disclosed. An HTS cable subassembly has a rectangular shaped cross section. The subassembly includes a stack of tapes formed of a superconducting material, and a cable subassembly wrapper wrapped around the stack of tapes. The tapes in the stack are slidably arranged in a parallel fashion. A cable assembly is formed of a cable assembly wrapper formed of a second non-superconducting material disposed around an n×m array of cable subassemblies. Within a cable assembly, a first cable subassembly of the array of subassemblies is oriented substantially perpendicular to a second cable subassembly with regard to the plurality of tapes. A compound-cable assembly is formed by joining two or more cable assemblies. A high-temperature superconducting magnet is formed of a solenoidal magnet as well as dipole and quadrupole magnets wound of a cable subassembly, a cable assembly, and/or a compound cable assembly.
    Type: Application
    Filed: November 25, 2015
    Publication date: August 18, 2016
    Inventors: Yukikazu Iwasa, Juan Bascuñán, Seungyong Hahn
  • Publication number: 20160240297
    Abstract: High-temperature superconducting (HTS) devices and methods are disclosed. An HTS cable subassembly has a rectangular shaped cross section. The subassembly includes a stack of tapes formed of a superconducting material, and a cable subassembly wrapper wrapped around the stack of tapes. The tapes in the stack are slidably arranged in a parallel fashion. A cable assembly is formed of a cable assembly wrapper formed of a second non-superconducting material disposed around an n x m array of cable subassemblies. A compound cable assembly is formed by joining two or more cable assemblies. A high temperature superconducting magnet is formed of a solenoidal magnet formed of a cable subassembly, a cable assembly, and/or a compound cable assembly.
    Type: Application
    Filed: February 12, 2015
    Publication date: August 18, 2016
    Inventors: Yukikazu Iwasa, Juan Bascuñán, Seungyong Hahn
  • Patent number: 9324486
    Abstract: The present invention is a superconducting partial insulation magnet and a method for providing the same. The magnet includes a coil with a non-insulated superconducting wire winding wound around a bobbin. The coil has a first wire layer, a second wire layer substantially surrounding the first layer, and a first layer of insulating material disposed between the first wire layer and the second wire layer. Each wire layer comprises a plurality of turns, and the first layer of insulating material substantially insulates the second wire layer from the first wire layer.
    Type: Grant
    Filed: June 17, 2013
    Date of Patent: April 26, 2016
    Assignee: Massachusetts Institute of Technology
    Inventors: Seungyong Hahn, YoungJae Kim, John Peter Voccio, Juan Bascunan, Yukikazu Iwasa
  • Publication number: 20160086707
    Abstract: The present invention is a superconducting partial insulation magnet and a method for providing the same. The magnet includes a coil with a non-insulated superconducting wire winding wound around a bobbin. The coil has a first wire layer, a second wire layer substantially surrounding the first layer, and a first layer of insulating material disposed between the first wire layer and the second wire layer. Each wire layer comprises a plurality of turns, and the first layer of insulating material substantially insulates the second wire layer from the first wire layer.
    Type: Application
    Filed: June 17, 2013
    Publication date: March 24, 2016
    Inventors: Seungyong Hahn, YoungJae Kim, John Peter Voccio, Juan Bascunan, Yukikazu Iwasa
  • Patent number: 9117578
    Abstract: An HTS magnet having a stack of a plurality of double-pancake (DP) coils is disclosed, with each DP coil having a first superconducting coil and a second superconducting coil. The plurality of DP coils have varying widths, with DP coils with the widest widths at the top and bottom of the stack, and DP coils with the narrowest coils located substantially at a midpoint of the stack. The DP coils omit turn-to-turn insulation, or have minimal turn-to-turn insulation.
    Type: Grant
    Filed: March 13, 2013
    Date of Patent: August 25, 2015
    Assignee: Massachusetts Institute of Technology
    Inventors: Seung-Yong Hahn, Yukikazu Iwasa, Juan Bascunan, Dong Keun Park
  • Publication number: 20150213930
    Abstract: An HTS magnet having a stack of a plurality of double-pancake (DP) coils is disclosed, with each DP coil having a first superconducting coil and a second superconducting coil. The plurality of DP coils have varying widths, with DP coils with the widest widths at the top and bottom of the stack, and DP coils with the narrowest coils located substantially at a midpoint of the stack. The DP coils omit turn-to-turn insulation, or have minimal turn-to-turn insulation.
    Type: Application
    Filed: March 13, 2013
    Publication date: July 30, 2015
    Applicant: MASSACHUSETTS INSTITUTE OF TECHNOLOGY
    Inventors: Seung-Yong Hahn, Yukikazu Iwasa, Juan Bascunan, Dong Keun Park
  • Patent number: 8965468
    Abstract: A persistent-mode High Temperature Superconductor (HTS) shim coil is provided having at least one rectangular shaped thin sheet of HTS, wherein the thin sheet of HTS contains a first long portion, a second long portion parallel to first long portion, a first end, and a second end parallel to the first end. The rectangular shaped thin sheet of high-temperature superconductor has a hollow center and forms a continuous loop. In addition, the first end and the second end are folded toward each other forming two rings, and the thin sheet of high-temperature superconductor has a radial build that is less than 5 millimeters (mm) and able to withstand very strong magnetic field ranges of greater than approximately 12 Tesla (T) within a center-portion of a superconducting magnet of a superconducting magnet assembly.
    Type: Grant
    Filed: October 25, 2012
    Date of Patent: February 24, 2015
    Assignee: Massachusetts Institute of Technology
    Inventor: Yukikazu Iwasa
  • Patent number: 8228148
    Abstract: A persistent-mode magnet, assembled from superconducting annuli, provides a micro coil NMR, in which compactness and manufacturability are provided for a variety of applications. An annular magnet for micro NMR can include a YBCO-annulus Helmholtz coil, for example, that can energized by a magnet system and then transported for use at a second location with an operating system.
    Type: Grant
    Filed: December 22, 2010
    Date of Patent: July 24, 2012
    Assignees: Massachusetts Institute Of Technology, Railway Technical Research Institute
    Inventors: Yukikazu Iwasa, Masaru Tomita
  • Publication number: 20110210729
    Abstract: A persistent-mode magnet, assembled from superconducting annuli, provides a micro coil NMR, in which compactness and manufacturability are provided for a variety of applications. An annular magnet for micro NMR can include a YBCO-annulus Helmholtz coil, for example, that can energized by a magnet system and then transported for use at a second location with an operating system.
    Type: Application
    Filed: December 22, 2010
    Publication date: September 1, 2011
    Inventors: Yukikazu Iwasa, Masaru Tomita
  • Patent number: 7859374
    Abstract: A persistent-mode magnet, assembled from superconducting annuli, provides a micro coil NMR, in which compactness and manufacturability are provided for a variety of applications. An annular magnet for micro NMR can include a YBCO-annulus Helmholtz coil, for example, that can energized by a magnet system and then transported for use at a second location with an operating system.
    Type: Grant
    Filed: October 3, 2006
    Date of Patent: December 28, 2010
    Assignees: Massachusetts Institute of Technology, Railway Technical Research Institute
    Inventors: Yukikazu Iwasa, Masaru Tomita
  • Publication number: 20070171014
    Abstract: A persistent-mode magnet, assembled from superconducting annuli, provides a micro coil NMR, in which compactness and manufacturability are provided for a variety of applications. An annular magnet for micro NMR can include a YBCO-annulus Helmholtz coil, for example, that can energized by a magnet system and then transported for use at a second location with an operating system.
    Type: Application
    Filed: October 3, 2006
    Publication date: July 26, 2007
    Inventors: Yukikazu Iwasa, Masaru Tomita
  • Patent number: 6389685
    Abstract: A current lead including a high-temperature superconductor and a normal conductive component is coupled to a superconducting device. Electric current is delivered through the current lead at a level above the critical current carrying capacity of the high-temperature superconductor, creating a current-sharing mode of conductance through at least part of both the superconducting component and the normal conductive component.
    Type: Grant
    Filed: June 9, 1999
    Date of Patent: May 21, 2002
    Assignee: Massachusetts Institute of Technology
    Inventor: Yukikazu Iwasa
  • Patent number: 5724820
    Abstract: In a "permanent" magnet system based on high-temperature superconductors, a superconducting magnet is cooled to a temperature below its critical temperature with a cooler. The magnet is coupled to a cold body of solid nitrogen which is insulated to minimize heat input to the system. The superconducting magnet is energized to generate a magnetic field and the cooler is removed. Unlike conventional superconducting magnets in which the magnet operating temperature is maintained at a fixed point, in the system of the present invention the operating temperature is allowed to rise from an initial value of approximately 20 K to as high as 63 K (the melting point of nitrogen), enabling operation over an extended period without the aid of direct cooling. The superconducting magnet is recooled periodically to lower its temperature to approximately 20 K. The magnetic field is maintained and the system is fully operable during the recooling process.
    Type: Grant
    Filed: February 9, 1996
    Date of Patent: March 10, 1998
    Assignee: Massachusetts Institute of Technology
    Inventor: Yukikazu Iwasa
  • Patent number: 5332988
    Abstract: A superconducting coil is mounted on a permanent non-magnetic coil form by first winding an unreacted wire onto a temporary coil form made of refractory materials which can be assembled and disassembled, reacting the wound unreacted wire at high temperatures to form a superconducting coil. The temporary coil form is disassembled and the superconducting coil is transferred to a permanent coil form made of a non-magnetic material. The temporary coil form includes a bore tube and an end flange made of a refractory material and a terminal flange made of a non-magnetic refractory material. The terminal flange is removably secured to the bore tube. The end flange is positioned next to the other end of the bore tube and held in position against the tube by means of an end plate. A terminal plate is removably positioned adjacent to the bore tube. The assembly is held together by means of an axial force on the terminal and end plates.
    Type: Grant
    Filed: May 15, 1992
    Date of Patent: July 26, 1994
    Assignee: Massachusetts Institute of Technology
    Inventors: Alexander Zhukovsky, Yukikazu Iwasa, Emanual Bobrov, John E. C. Williams