Siemens Magnet Technology Ltd.

Siemens Corporation

Andrew Farquhar Atkins

Graham Gilgrass

Andrew James Gray

Marcel Jan Marie Kruip

Paul Beasley

Wolfgang Stautner

Scott Roberts

The present invention provides a material for the construction of external coverings accessible by humans or animals. It aims to increase the breakdown voltage between a high voltage VRF, high frequency source of energy and the human or animal, by adaptation of materials and structures. According to an embodiment of the invention, a structure is provided for the coverused in MRI or NMR systems, which carries a greater proportion Vs of the voltage VRF across itself, thereby reducing the voltage Vg across the gapand reducing the likelihood of breakdown.

Material for electrical isolation and vibro-acoustic performance

An electromagnet comprising a plurality of coils of superconductive material, monolithically embedded in an embedding material, which is solid at the temperature of operation of the superconductive electromagnet, and a method for producing an electromagnet comprising a plurality of coils of superconductive material, comprising the steps of winding coils of superconductive material, retaining the coils at predetermined relative positions, and monolithically embedding the plurality of superconducting coils in an embedding material, which is solid at the temperature of operation of the superconductive electromagnet.

Electromagnet

A cryogen tank in thermal and mechanical attachment with the equipment to be cooled. Direct thermal conduction between the cryogen and the equipment provides the required cooling. The tank is preferably arranged so as to lie within an existing profile of the cooled equipment, and to be relatively small as compared to known cryogen tanks.

Cryogen tank for cooling equipment

The present provides a cryogenic thermal battery arrangement for maintaining a superconducting magnet coil or similar apparatus at cryogenic temperature for a required shipping period, such as thirty days, without consuming a significant amount of costly cryogen. According to another aspect, the invention allows extended shipping periods without incurring excessive costs.

Method and apparatus for maintaining apparatus at cryogenic temperatures over an extended period without active refrigeration

A quench protection circuit for a superconducting magnet, comprises at least one heater associated with a corresponding coil of the superconducting magnet. The at least one heater is arranged to be driven by an inductor which is connected in series with it and is arranged to derive a voltage from variation in a magnetic field of the superconducting magnet. The at least one heater and the inductor are arranged in a series circuit which further comprises a non-linear positive temperature coefficient resistors.

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Oxon, United Kingdom

Andrew Farquhar Atkins