Tokamak Energy Ltd

A High Temperature Superconductor, HTS, magnet comprising a coil formed of nested concentric windings. Each winding comprises HTS material. The HTS magnet further comprises a conductor element comprising an electrical contact surface through which to supply electric current to a portion of at least one of the windings. The surface provides electrical contact between the conductor element and an axial edge of the coil substantially around the path of the at least one of the windings.

An electromagnet comprising having one or more channels. Each channel has provided therein a conductor element comprising one or more layers of superconductor material for conducting electrical current along an axis of the channel. The conductor element is arranged to contact sidewalls of the channel through first and second wedge surfaces that are inclined with respect to one another such that a force biasing the conductor element in a direction perpendicular to the axis generates opposing contact forces on the wedge surfaces that act to compress the conductor element along a direction with a component perpendicular to the force.

Neutron shielding comprising a metal-hydride metal composite: the metal-hydride metal composite comprising: a metal matrix; and a plurality of metal-hydride particles dispersed within the metal matrix; wherein, the fraction of metal-hydride in the metal-hydride metal composite is at least 1 mol % and the volume fraction of metal-hydride in the metal hydride metal composite is no higher than the ratio of the solid solubility limit of hydrogen in the metal matrix and the molar fraction of hydrogen in the metal-hydride.

A bonding element suitable for diffusion bonding two components includes a sealing structure for locating between the two components; and a heating element connected to the sealing structure and configured to provide local heating to the sealing structure sufficient to cause the sealing structure to diffusion bond to each of the two components and provide a seal between them.

A high temperature superconducting, HTS, field coil. The HTS field coil comprises a plurality of turns comprising HTS material and metallic stabilizer; and a partially insulating layer separating the turns, such that current can be shared between turns via the partially insulating layer. The partially insulating layer comprises an insulating region, and a plurality of electrically conductive paths through the insulating region, wherein current can be shared between the turns via the electrically conductive paths. Each electrically conductive path comprises an HTS bridge comprising HTS material, wherein the HTS bridge is in series with normally conducting material of the electrically conductive path.

A plasma-facing component for a plasma chamber, comprising: a plasma-facing target surface; an inlet through which to receive a coolant fluid and an outlet through which to expel the coolant fluid; and a plurality of internal cooling channels. Each cooling channel is connected to the inlet by a plurality of feed channels and to the outlet by a plurality of return channels, the feed channels being configured to direct coolant fluid against a region of a wall of the cooling channel. Respective openings of the feed and return channels into the cooling channel are arranged in non-overlapping repeating units along a length of the cooling channel. Each unit comprises openings of at least one feed channel and at least one return channel.

A High Temperature Superconductor, HTS, magnet comprising a coil formed of nested concentric windings. Each winding comprises HTS material. The HTS magnet further comprises a conductor element comprising an electrical contact surface through which to supply electric current to a portion of at least one of the windings. The surface provides electrical contact between the conductor element and an axial edge of the coil substantially around the path of the at least one of the windings.

A method for manufacturing a superconducting magnet comprising: providing an electrically conductive substrate (such as an open U-channel) shaped into a substantially planar coil having a plurality of turns, the electrically conductive substrate having a groove along its length, the groove facing a radial direction of the coil or, in other words, the groove facing either inwardly or outwardly in the plane of the coil; translating at least a portion of the electrically conductive substrate out of the plane of the coil to expose at least a portion of the groove; and inserting superconducting material into the exposed portion of the groove.

A tokamak plasma vessel. The tokamak plasma vessel comprises a toroidal plasma chamber, a plurality of poloidal field coils, an upper divertor assembly, and a lower divertor assembly. The plurality of poloidal field coils are configured to provide a poloidal magnetic field having a substantially symmetric plasma core and an upper and lower null, such that ions in a scrape off layer outside the plasma core are directed by the magnetic field past one of the upper and lower nulls to divertor surfaces of the respective upper and lower divertor assembly. Each of the upper and lower divertor assembly comprises a liquid metal inlet and a liquid metal outlet located below the liquid metal inlet. Each of the upper and lower divertor assembly is configured such that in use liquid metal flows from the liquid metal inlet to the liquid metal outlet over at least one divertor surface of the divertor assembly.

A superconducting magnet comprising a field coil comprising high temperature superconducting material and having a joint; a bypass resistance comprising a non-superconducting conductive material, wherein the bypass resistance is electrically connected to the field coil on both sides of the joint; wherein the joint is openable to break the field coil such that current flowing in the superconductor flows though the bypass resistance in order to dump energy from the field coil, and wherein the superconducting magnet is configured to open the joint in response to detection of a quench in the magnet.