Siemens Corporation

Siemens Healthcare Gmbh

Hugh Alexander Blakes

Matthew John Longfield

Patrick William Retz

Robert Andrew Slade

Marcel Jan Marie Kruip

Russell Peter Gore

Adam Paul Johnstone

Graham Hutton

Peter Jonathan Davis

Eugene Astra

Yunxin Gao

A superconducting magnet coil arrangement has multiple superconducting coils and at least one of the superconducting coils is provided with a secondary coil of insulated resistive wire mechanically attached to a surface of the superconducting coil.

Superconducting magnet coil arrangement

An adaptive passive quench propagation circuit in combination with a superconducting magnet having multiple superconducting coils electrically connected in series between a power supply terminal and a ground reference voltage terminal, has a superconducting switch arranged to electrically connect the power supply terminal and the ground reference voltage terminal to provide a closed-loop persistent superconducting circuit, multiple resistive heaters, each in thermal contact with one of the coils, a tapping point situated between two electrically adjacent coils, and a quench propagation circuit connected between the tapping point and a reference voltage.

Passive adaptive quench propagation circuit

In a method and apparatus for shimming a superconducting magnet that has a number of magnet coils electrically connected in series between a first current connection and a second current connection and a superconducting switch connected in parallel with the magnet coils, between the first current connection and the second current connection, with the first current connection being electrically connected to an external current lead, a first solid-state switching device is electrically interposed between the external current lead and the magnet coils; a number of superconducting shim coils electrically connected between the first current connection and the second current connection through a further solid-state switching device. Superconducting switches are each connected in parallel with a respective superconducting shim coil.

Method and apparatus for shimming a superconducting magnet

A superconducting electromagnet comprising coils of superconducting wire bonded to a support structure, and wherein heating elements are provided in thermal contact with the support structure for heating the support structure.

Superconducting electromagnets comprising coils bonded to a support structure

In a method and apparatus for maintaining operation of ancillary equipment associated with a superconducting magnet carrying a DC current, the DC current is directed through a DC-to-AC converter, and the magnitude of the current flowing through the superconducting magnet is ramped down at a controlled rate, thereby generating a controlled voltage across a controlled impedance, and powering the ancillary equipment by the controlled voltage and an associated current, and the ramping rate is controlled in order to maintain a required controlled voltage.

Method and apparatus for orderly run-down of superconducting magnets

A portable magnet power supply for a superconducting magnet includes apparatus for the storage of energy released from a superconducting magnet, the apparatus having an electrical run-down load for connection across the electrical terminals of a superconducting magnet; and a heat storage material in thermal contact with the run-down load; and a method for use thereof.

Portable magnet power supply for a superconducting magnet and a method for removing energy from a superconducting magnet using a portable magnet power supply

A quench propagation arrangement for a superconducting magnet comprising a plurality of series-connected superconducting coils, the arrangement comprising: a positive supply line connected to cathodes of first diodes, of which respective anodes are connected to each respective node of the series connection of superconducting coils; a negative supply line connected to anodes of second diodes, of which respective cathodes are connected to each respective node of the series connection of superconducting coils; a number of heaters, respectively thermally connected to each of the superconducting coils and electrically connected between the positive supply line and the negative supply line; and a voltage limiter connected between the positive supply line and the negative supply line, in parallel with the heaters.

Quench propagation circuit for superconducting magnets

An energy dissipation arrangement for a cryogenically cooled superconductive magnet comprising a plurality of superconductive coils () connected in series and housed within a cryostat (), comprising a superconducting switch () having a superconductive current path () in series with the superconductive coils (); and a resistor (), external to the cryostat, electrically connected in parallel with the superconductive current path () of the superconducting switch (). The superconductive switch is arranged () to open in response to an electric current applied to an associated heater ().

Quench energy dissipation for superconducting magnets

A method for progressively introducing current into, or removing current from, a superconducting coil mounted on a former, in which the coil vibrates relative to the former.

Method for progressively introducing current into a superconducting coil mounted on a former

In a superconducting magnet assembly a plurality of superconducting coils, joined in series, are housed within a cryostat. A coil node between two electrically adjacent of the superconducting coils provides an input voltage. A coil node voltage output is provided comprising a series resistor connected between the coil node and a further node. A non-linear element is connected between the further node and a ground voltage, and an output connector is electrically connected to the further node and traverses a boundary of the cryostat.

Coil node voltage outputs for superconducting magnets

An assembly comprising a number of superconductive coils, at least one quench heater arranged to heat the superconductive coil(s) in the event that at least part of at least one of the coils enters a quenched state; means for transferring energy from the coil(s) to the heater(s) in the event that at least part of at least one of the coils enters a quenched state; wherein the means for transferring energy from the coil(s) to the heater(s) includes a series capacitance, through which the energy transferred must pass.

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Oxfordshire, United Kingdom

Hugh Alexander Blakes