Abstract: A single-crystal pulling apparatus including: a pulling furnace having a central axis; and a magnetic field generation device arranged around the pulling furnace and having superconducting coils, the apparatus applying a horizontal magnetic field to the molten semiconductor raw material, two coil axes in the two pairs of the superconducting coils are included in a single horizontal plane, and when a direction of lines of magnetic force at the central axis of the pulling furnace in the horizontal plane is determined as an X axis, a center angle ? having the X axis between the two coil axes is 100 degrees or more and 120 degrees or less. This makes it possible to reduce the height of the coils, to raise the magnetic field center close to the melt surface of the semiconductor raw material, and to obtain a single crystal having a lower oxygen concentration than conventional single crystals.

Abstract: A method of manufacturing an HTS coil is provided. The method comprises winding an ITS coil cable to produce a coil having a plurality of turns. During winding of a turn of the coil, one or more HTS shunt cables are placed adjacent to the previous turn of the coil along a first arc of the coil, and then the turn is wound such that the HTS shunt cable is sandwiched between the turn and the previous turn of the coil such that current can be shared between the HTS shunt cable and the HTS coil cable.

Abstract: Halbach array of magnetically isotropic electromagnets, comprised of loosely-wound, spring-like nested electromagnetic coils, wound and arranged in close proximity in Halbach array sequence, encased in various combinations of powdered magnetic metal composite and binder, formed, wired, and assembled to serve as a stater and/or rotor of an electric motor or generator.

Abstract: Embodiments of the disclosure provide a medical apparatus (100), comprising: a structure defining a bore (104) in which a patient or part of a patient can be positioned during use; an MRI system comprising: a receiving coil device (116) positioned within the bore, the receiving coil device (116) comprising a receiving coil for detecting radio signals emitted by relaxing nuclei within the patient; a constraining mechanism (118) coupled between the structure and the receiving coil device (116), the constraining mechanism (118) permitting movement of the receiving coil device (116) in a single linear dimension; and one or more retractable suspension mounts (120a, 120b), each of the one or more retractable suspension mounts (120a, 120b) comprising a flexible line arranged to suspend at least part of the receiving coil device (116) within the bore.

Abstract: A magnetic resonance system may include a magnetic resonance magnet and a storage container configured to accommodate the magnetic resonance magnet. The storage container may also contain an endothermic liquid. The magnetic resonance system may further include a ramping-down device configured to trigger releasing electric energy by the magnetic resonance magnet. The first ramping-down device may include an electric energy consumption device configured to consume at least a portion of the released electric energy by the magnetic resonance magnet.

Abstract: A charging and field supplement circuit for superconducting magnets based on a pulsed current includes a capacitor charging circuit, an energy-storage capacitor, a capacitor discharging circuit, a superconducting magnetic energy storage circuit, and a superconducting persistent-current switch. Two output ends of the capacitor charging circuit are respectively connected to two ends of the energy-storage capacitor. Two input ends of the capacitor discharging circuit are respectively connected to the two ends of the energy-storage capacitor. Two output ends of the capacitor discharging circuit are respectively connected to two input ends of the superconducting magnetic energy storage circuit. Two output ends of the superconducting magnetic energy storage circuit are respectively connected to two input ends of the superconducting persistent-current switch. Two output ends of the superconducting persistent-current switch are configured to charge and magnetize a target superconducting magnet.

Abstract: A high-temperature superconducting (HTS) magnetic levitation (maglev) Dewar capable of increasing damping and levitation force and a width calculation method thereof. The HTS maglev Dewar includes an outer container and an inner container. The outer container is fixedly connected to the inner container through a connecting column. The inner container has a cavity configured to accommodate liquid nitrogen. A bottom of the inner container is provided with a bulk superconductor. The inner container is communicated with outside through a liquid nitrogen feeding pipe. The outer container is made of an electrically conductive material.

Abstract: An electromagnet for a Magnetic Resonance Imaging (MRI) apparatus. The electromagnet includes a coil configured to generate a magnetic field. The coil has a first axially outer surface, and a support element configured to mount the coil in the MRI. The support element is bonded to the first axially outer surface of the coil.

Abstract: A superconductivity stabilizing material used for a superconducting wire and which is formed of a copper material containing at least one of additive elements selected from Ca, Sr, Ba, and rare earth elements in a range of 3 ppm by mass or more and 100 ppm by mass or less in total, with a remainder being Cu and unavoidable impurities, in which the total concentration of the unavoidable impurities, excluding O, H, C, N, and S which are gas components, is 5 ppm by mass or more and 100 ppm by mass or less, the half-softening temperature thereof is 200° C. or lower, the Vickers hardness thereof is 55 Hv or more, and the residual resistance ratio (RRR) thereof is 50 or more and 500 or less.

Abstract: An isochronous cyclotron including one or more coils and a plurality of pairs of bulk superconductor sectors. The one or more coils can be configured to generate a magnetic field in the beam chamber having a magnetic flux density that increases radially from the central axis of the beam chamber, and is orientated substantially perpendicular to the median acceleration plane of the beam chamber. Each pair of bulk superconductor sectors can be disposed on opposite sides of the median acceleration plane. The plurality of pairs of bulk superconductor sectors can be configured to guide or concentrate the magnetic field to provide an axial focusing component of the magnetic field.

Abstract: A sensor arrangement, including: a rotatable driving shaft extending along a rotation axis and comprising a bore extending from a first end face of the shaft along the rotation axis; a substantially ring-shaped magnet arranged within the bore and coupled to the driving shaft, the magnet configured to generate a magnetic field within the bore; and a sensor configured to sense a rotation of the magnetic field in response to rotation of the driving shaft.

Abstract: A magnetic field z-gradient coil is manufactured by inserting elements (38) into openings (36) on an outside of an insulating carrier (32), wrapping an electrical conductor turn (34) around the outside of the insulating carrier with one side of the wrapped electrical conductor alongside elements inserted into openings on the outside of the insulating carrier, removing the elements alongside the one side of the wrapped electrical conductor from the openings, and repeating to wrap conductor turns of a z-gradient coil (20) around the electrically insulating carrier. A transverse magnetic field gradient coil is manufactured by laying electrical conductor (44) onto a mold (50) with a keying feature (46, 46a) extending along the conductor engaging a mating keying feature (52, 52a) of the mold that defines a winding pattern (56), attaching an insulating back plate (58) to the resulting coil section opposite from the mold, and removing the mold.

Abstract: A quench protection system for a superconducting machine, such as a superconducting generator having a plurality of series-arranged superconducting coils, includes at least one switch heater electrically coupled to each of the superconducting coils. A quench protection switch is provided in series with the coils, wherein each switch heater is in thermal contact with the quench protection switch. A heater network is configured in parallel with the quench protection switch and is in thermal contact with each of the coils. A quench of any one of the coils triggers a quench of the quench protection switch, wherein the heater network then triggers a quench of all of the remaining coils.

Abstract: A superconducting magnet (10) includes a cryogenic container (22, 32) containing a superconducting magnet winding (20). A sealed electrical feedthrough (36) passes through the cryogenic container. A contactor (40) inside the cryogenic container has an actuator (42) and feedthrough-side and magnet-side electrical terminals (46, 47). A high temperature superconductor (HTS) lead (60) also disposed in the cryogenic container has a first end (62) electrically connected with the magnet-side electrical terminal of the contactor and a second end (64) electrically connected to the superconducting magnet winding. A first stage thermal station (52) thermally connected with the first end of the HTS lead has a temperature (T1) lower than the critical temperature (TC,HTS) of the HTS lead. A second stage thermal station (54) thermally connected with the second end of the HTS lead has a temperature (T2) lower than a critical temperature (TC) of the superconducting magnet winding (20).

Abstract: A superconducting magnet may include magnet coils including at least one group of outer coils and at least one group of inner coils, a container including an accommodating space, at least one first chamber that is disposed within the accommodating space and houses the at least one group of the inner coils, and at least one second chamber that is disposed within the accommodating space and houses the at least one group of the outer coils. The at least one first chamber and the at least one second chamber may be configured to be filled with a cooling medium and are in fluid communication with each other. The cooling medium may be configured to cool the magnet coils to a superconducting state.

Abstract: A superconducting magnet arrangement comprises a field coil assembly with coil windings that when in operation are electrically superconducting. The field coil assembly is circuited between connection ports for a voltage supply. A switching module switches a sub-section of the field coil assembly's coil windings between its electrical superconducting and electrical resistive states, said sub-section forming a switching coil circuited between the connection ports. In the operational state where both the switching coil and the field coil(s) are superconducting and carry a permanent electrical current, the field coil(s) and the switching coil together generate a stationary magnetic field. According to the invention the switch windings give a significant contribution to the magnetic field. The field coil assembly's coil windings that may be switched between it electrically superconducting and resistive states form the switching coil.

Abstract: An electric coil device includes a winding support which is made of an elongated hollow tube that has the shape of a ring such that a higher-order loop of the winding device is formed entirely by the annular shape of the winding support, and a winding which is made of a superconductive conductor and is attached to the winding support. The superconductive conductor is wound in a helical manner about the hollow tube in a plurality of individual windings such that at least one higher-order winding of the entire helix is produced by the annular shape of the winding support. The interior of the hollow tube is designed as a coolant channel for circulating a fluid coolant. A rotor for an electric machine includes at least one such coil device.

Abstract: A current lead assembly for minimizing heat load to a conduction cooled superconducting magnet during a ramp operation is provided. The current lead assembly includes a vacuum chamber having a through hole to enable a first end of a current lead contact to remain outside the vacuum chamber and a second end of the current lead contact to penetrate within the vacuum chamber. A vacuum boundary wall is located between the vacuum chamber and the current lead contact. At least one superconducting magnet is arranged inside of the vacuum chamber and includes a magnet lead. A second end of the current lead contact is coupled to the magnet lead via an internal lead. A vacuum cap is removably disposed to sealingly encompass therein the first end of the current lead contact during a first state of operation. The first end of the current lead contact is arranged to contact a power supply during a second state of operation, wherein the contact occurs exterior the vacuum chamber.

Abstract: A method for charging an HTS shim device in a cryostat having a room temperature bore using a charging device. A shim switch temporarily interrupts the superconducting state in a section of an HTS shim conductor path. The charging device includes a primary circuit with a normal-conducting charging coil and the conductor path forms a secondary circuit. A current change in the secondary circuit results from a change in magnetic flux generated by the charging coil through the secondary circuit. In a first phase the shim switch is opened to interrupt the superconducting state in a section of the conductor path, the charging coil is positioned in the bore, and the current in the primary circuit is changed; in a second phase, the conductor path is superconductingly closed; in a third phase, the current in the primary circuit is changed and/or the charging coil is removed from the bore.

Abstract: A cryocooler includes a second-stage cooling stage, a second cylinder which includes the second-stage cooling stage on a terminal of the second-stage cylinder, a second-stage displacer which includes a magnetic regenerator material and is accommodated in the second-stage cylinder so as to be able to reciprocate in the second-stage cylinder, and a tubular magnetic shield which is installed on the second-stage cooling stage and extends along the second-stage cylinder outside the second-stage cylinder. The magnetic shield is formed of a normal conductor and a product of an electrical conductivity in a temperature range of 10 K (Kelvin) or less and a thickness of the tubular magnetic shield is 60 MS (Mega-Siemens) to 1980 MS.

Abstract: A pre-polarisation magnet arrangement for generating a pre-polarisation field for use in a low field magnetic resonance imaging process, the pre-polarisation magnet arrangement including a pre-polarisation field array including a plurality of permanent pre-polarisation magnets mounted in a support and provided in a circumferentially spaced arrangement surrounding an field of view, a number of the pre-polarisation magnets being movable between respective first and second positions, wherein in the first position the pre-polarisation magnets are configured as a cylindrical Halbach array to generate a pre-polarisation field in the field of view and in the second position the pre-polarisation magnets are configured to minimize the pre-polarisation field in the field of view.

Abstract: A persistent current switch system is presented. One embodiment of the persistent current switch system includes a vacuum chamber having a winding unit and dual cooling paths. The dual cooling paths are configured to circulate a coolant flow. The dual cooling paths are defined by a first cooling path and a second cooling path. The first cooling path includes a solid thermal component disposed in direct contact with the winding unit and the second cooling path includes a cooling tube disposed in direct contact with the winding unit and configured to circulate a coolant therein. The dual cooling paths cool the temperature of the winding unit below the threshold temperature to transition the persistent current switch system from the first mode to the second mode. A method of for cooling a winding unit in a persistent current switch system and a switching system including dual cooling paths are also disclosed.

Abstract: A magnetic resonance imaging device is described that includes multiple magnetic coils to generate a magnetic field. Additionally, the magnetic resonance imaging device may include one or more radial gaps within some or all of the magnetic coils (e.g., primary magnetic coils, bucking coils, and so forth) in which radial spacers may be located to help preserve the homogeneity of the magnetic isocenter of the primary magnetic coils during operation.

Abstract: A method of manufacturing an HTS coil is provided. The method comprises winding an HTS coil cable to produce a coil having a plurality of turns. During winding of a turn of the coil, one or more HTS shunt cables are placed adjacent to the previous turn of the coil along a first arc of the coil, and then the turn is wound such that the HTS shunt cable is sandwiched between the turn and the previous turn of the coil such that current can be shared between the HTS shunt cable and the HTS coil cable.

Abstract: Provided is a connection structure for superconductor wires, in which two superconductor wires include respective oxide superconducting conductor layers each formed on one surface of a base material. The oxide superconducting conductor layers are conjoined with each other while facing each other at a connected end of each of the two superconductor wires. An embedment material for reinforcement is provided from one of the two superconductor wires to the other one of the two superconductor wires in a thickness direction of the two superconductor wires at the connected end of each of the two superconductor wires.

Abstract: A cryogenic cooling system (10) comprising a cryostat (12), a two-stage cryogenic cold head (24) and at least one thermal connection member (136; 236; 336; 436) that is configured to provide at least a portion of a heat transfer path (138; 238; 338; 438) from the second stage member (30) to the first stage member (26) of the two-stage cryogenic cold head (24). The heat transfer path (138; 238; 338; 438) is arranged outside the cold head (24). A thermal resistance of the provided at least portion of the heat transfer path (138; 238; 338; 438) at the second cryogenic temperature is larger than a thermal resistance of the provided at least portion of the heat transfer path (138; 238; 338; 438) at the first cryogenic temperature.

Abstract: The present invention provides a radiation shield (204), in particular for shielding main coils (202) of a magnetic resonance imaging system (110), whereby the radiation shield (204) comprises a cavity (214) for housing at least one main coil (202), whereby the cavity (214) is formed between an inner cylindrical wall (206), an outer cylindrical wall (208), which are arranged essentially concentrically to each other, and two ring-shaped base walls (212), which interconnect the inner cylindrical wall (206) and the outer cylindrical wall (208), wherein at least one out of the inner cylindrical wall (206), the outer cylindrical wall (208), and the two ring-shaped base walls (212) is provided at least partially with an inner layer (216), which faces the cavity (214), and an outer layer (218), wherein the inner layer (216) is a layer comprising carbon fiber reinforced plastic, and the outer layer (218) comprises a metal, which is paramagnetic or diamagnetic.

Abstract: An active feedback controller for a power supply current of a no-insulation (NI) high-temperature superconductor (HTS) magnet to reduce or eliminate the charging delay of the NI HTS magnet and to linearize the magnet constant.

Abstract: An energy storage device includes multiple bulk superconductor rings and at least one superconductor wire coil between the multiple bulk superconductor rings. The multiple bulk superconductor rings and the at least one superconductor wire coil are interconnected to define a closed geometric shape.

Abstract: Assisted magnetic forming uses a magnetic field to assist in the forming or molding of metallic and non-metallic materials. For example, such a forming process may form a blank of ferromagnetic metals like high-strength steel and high-hard armor, non-ferromagnetic metals like aluminum and magnesium, as well as non-metals like ceramics, plastics, and fiber-reinforced composites into formed or molded parts. The magnetic field is generated to partially or completely saturate the blank during the forming process, which increases the blank's formability and/or moldability while in the presence of the magnetic field.

Abstract: An apparatus includes a chamber and a bulk superconductor disposed within the chamber. The apparatus also includes a heating element coupled to the bulk superconductor.

Abstract: Disclosed is an insulation treatment method for a helium inlet pipe of a superconducting magnet. The superconducting magnet has a structure with varying T-shaped cross section. The irregular parts of the magnet are filled with G10 to reduce the difficulty in the insulation treatment caused by the irregular shape. Moreover, a skirt-shaped insulating material is provided around the metal conduit to overcome the reduction in the insulation electrical performance caused by the defects in the insulation treatment for such irregular parts. The application designs a sample structure for insulation treatment, and can wrap the superconducting magnet having the T-shaped varying cross-section with insulating materials before vacuum pressure impregnation, meeting special requirements of high-voltage insulation treatment for the superconducting magnet with a complex structure under low temperature and vacuum environment.

Abstract: The present disclosure provides a method for fabricating a magnetic semiconductor device, including receiving a semiconductor wafer, disposing the semiconductor wafer under a first electromagnetic element, wherein the first electromagnetic element comprises a primary dimension and a secondary dimension from a top view perspective, the primary dimension being greater than the secondary dimension, and displacing the semiconductor wafer along a predetermined path along the secondary dimension of the first electromagnetic element.

Abstract: Neutron shielding for the central column of a tokamak nuclear fusion reactor. The neutron shielding comprises an electrically conductive neutron absorbing material. The neutron shielding is arranged such that the electrically conductive neutron absorbing material forms a solenoid for the initiation of plasma within the tokamak.

Abstract: The disclosed embodiments provide a highly efficient, utility scale energy storage and retrieval system. The system is characterized by a chain of multiple rotating interconnected masses (8), a hollow toroid-shaped housing (1), plural pairs of permanent magnets (7, 11), magnets (7, 11) and coils (10) for the charging and discharging of electric energy and is operated by an automated control system. The mass (8) chain is fitted and rotating inside the housing (1), and the energy is stored into the rotational energy of the chain. The transformation of electrical energy into rotational energy or vice versa is carried out by using coil units (10). In order to minimize losses, the chain is magnetically levitating and a vacuum is pumped into the housing (1).

Abstract: An apparatus for magnetic field compression includes a plurality of tubes of different dimensions. Each smaller tube extends within a larger tube and each tube includes an electrically conductive material for generating a magnetic field in response to electric current flowing in the conductive material. A longitudinal slot is formed in each tube. The longitudinal slot in each tube is aligned to form an aperture in which the magnetic field is compressed or has a highest magnetic flux in the aperture in response to the electric current flowing in the conductive material of each tube.

Abstract: A coil segment, in particular for a stator coil, wherein the coil segment has a conductor bundle, wherein the conductor bundle has a multiplicity of electrical conductors, wherein the conductor bundle has a form fit, wherein the conductor bundle has at least one cutout for feeding coolant. Furthermore, a method for manufacturing a stator coil, a stator coil having a coil segment according to the present invention, a machine having a stator coil according to the present invention, and a vehicle having a machine according to the present invention.

Abstract: An arrangement for cryogenic cooling includes a cryogen tank, a cryogenic recondensing refrigerator arranged to cool a heat exchanger that is exposed to the interior of the cryogen tank, and an arrangement for conducting heat from a cooled article to the cryogen tank. A further cryogen tank is provided below the heat exchanger and arranged to receive cryogen liquid recondensed on the heat exchanger.

Abstract: A method for adjusting a magnetic field of a magnetic resonance tomography (MRT)-device having a magnet includes: transferring the magnet from an operating state to a non-operating state in a ramp-down mode; subsequently transferring the magnet from the non-operating state to the operating state in a ramp-up mode; observing a reference parameter different from the magnetic field; setting a target value for the reference parameter; comparing the observed reference parameter to the target value; and finishing the ramp-up mode when the reference parameter reaches the target value.

Abstract: A superconducting magnet device with which device breakage caused by a quench can be avoided while helium consumption is reduced. A sheet-like convection-preventing member is disposed at least either above or below a heat transfer member transferring to gaseous helium heat transferred from the outside, so as to cover a helium gas release tube for the gaseous helium, and thus heat exchange performance during transportation is improved. In the case where the quench occurs, the convection-preventing member is lifted upward in the release tube, thereby ensuring to provide a flow path for the gaseous helium and avoiding excessive increase of the internal pressure.

Abstract: A superconducting magnetic energy storage (SMES) device having a plurality of interwoven windings provides for alternative discharge paths for energy stored as magnetic fields in the windings in response to an open-circuit winding fault in one of the windings.

Abstract: A cylindrical superconducting coil assembly has multiple individual coil units stacked together and retained in place by retaining structures, each coil unit having a resin-impregnated annular superconducting coil bonded at its axial extremities to respective rings of non-ferromagnetic material.

Abstract: A superconducting magnet includes: a superconducting coil; a coolant container; a radiation shield; a vacuum container; a refrigerator configured to cool the inner part of the coolant container and the radiation shield; a first exhaust pipe connected to the coolant container from the outside of the vacuum container and serving as a flow path of the coolant vaporized; a first pressure release valve connected to a distal end of the first exhaust pipe outside the vacuum container and configured to open when a pressure in the coolant container becomes a first set value or higher; a heater provided at the first exhaust pipe and configured to heat the first exhaust pipe; and a detector provided at the first exhaust pipe and configured to detect a change due to occurrence of freezing in the first exhaust pipe.

Abstract: Disclosed is a method for generatively producing components by layer-by-layer building from a powder material by selective material bonding of powder particles by a high-energy beam. An eddy current testing is carried out concurrently with the material bonding. Also disclosed is an apparatus which is suitable for carrying out the method.

Abstract: A cooling device (1) has a cryostat (2) and a cold head (3) of a cooling system (52), and additionally includes a pivot bearing (35), with which the cold head (3) is mounted on the cryostat (2) so as to be rotatable about a rotation axis (A). A connecting line (15) for a working gas of the cooling system (52) is connected to the cold head so that forces caused by the cooling system (52) act on the cold head (3) via the connecting line (15) at a force application point (EP) in a force application direction (ER). The force application direction (ER) is inclined by no more than 40° with respect to the normal (N) of a lever plane (HE) which contains the rotation axis (A) and the force application point (EP).

Abstract: An apparatus includes at least a first electrically conductive coil having at least first and second coil sections which are separated and spaced apart from each other, and a support structure disposed to support the first and second coil sections. The support structure, and an associated method of supporting the electrically conductive coil, maintain relative axial positions of the first and second coil sections to be fixed when the first electrically conductive coil is energized and de-energized, and allow each of the first and second coil sections to expand radially when energized.

Abstract: An arrangement for current limitation which is suitable for integration in a power supply serving network and which has a superconductive conductor, which is attached to at least one plate like support composed of insulation material. On the at least one support three separate from each other superconductive conductors in spiral form windings parallel to each other running to a separate connection is arranged on the phases of a three phase alternating current network. The support equipped with the phase conductors is built in to a container constructed as a cryostat.

Abstract: The present disclosure relates to a flexible support apparatus for superconducting magnet in superconducting rotating machine. The present disclosure relates to a flexible support apparatus for superconducting magnet in superconducting rotating machine that includes a superconducting magnet that is located in a rotor body of a superconducting rotating machine, a vacuum container that internally stores the superconducting magnet, a first support that supports the superconducting magnet by being internally attached to the vacuum container, a third support that supports the superconducting magnet by being externally attached to the superconducting magnet, and a second support that is located between the first support and the second support and that supports the superconducting magnet by including a flexible material.

Abstract: In one embodiment, non-contact assessment of reinforced concrete is performed by positioning a reference electrode in close proximity to a surface of the concrete without contacting the electrode to the surface, vibrating the electrode with a vibration generator, and measuring the electrical potential difference between the electrode and the concrete surface, the potential difference being indicative of the condition of a portion of a reinforcement member positioned below the concrete surface at the location of the electrode.

Abstract: A magnet coil system (1) has a first end section (19a) of an HTSL-tape conductor (4) located ahead of a first end (19) of an HTSL-tape conductor (4) and a first end section (20a) of an LTS wire (7) located prior to a first end (20) of the LTS wire (7) which are connected electrically but not in a superconducting way in a connecting section (17) along the length of the connecting section. The LTS wire (7) has a flat shape at least within the connecting section (17) and one side of the flat LTS wire (7) abutting the HTSL-tape conductor (4) and the connecting section (17) has a length of at least 5 m. The magnet coil system has an acceptably small residual ohmic resistance which is achieved by simple means.