Rapid dump of partially insulated superconducting magnet
OwnerRobert Slade, Bas van Nugtereninventors
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Abstract
An HTS magnet system comprising an HTS field coil and a power supply. The HTS field coil comprises a plurality of turns comprising HTS material and a metallic stabiliser; and an electrically conductive layer separating the turns, such that current can be shared between turns via the conductive layer. The power supply is configured to: during ramp-up of the HTS field coil, provide a first current to the HTS field coil; and during ramp-down of the HTS field coil, provide a second current to the HTS field coil opposite in direction to the first current.
Claims22
A high temperature superconductor, HTS, magnet system comprising an HTS field coil and a power supply, wherein:
- the HTS field coil comprises:
- a plurality of turns comprising HTS material and a metallic stabiliser;
- an electrically conductive layer separating the turns, such that current can be shared between turns via the conductive layer;
- the power supply is configured to:
- during ramp-up of the HTS field coil, to provide a first current to the HTS field coil
- during ramp-down of the HTS field coil, to provide a second current to the HTS field coil opposite in direction to the first current.
A high temperature superconductor, HTS, magnet system comprising an HTS field coil and a power supply, wherein:
- the HTS field coil comprises:
- a plurality of turns comprising HTS material and a metallic stabiliser;
- an electrically conductive layer separating the turns, such that current can be shared between turns via the conductive layer;
- the power supply is configured to:
- during ramp-up of the HTS field coil, to provide a first current to the HTS field coil
- during ramp-down of the HTS field coil, to provide a second current to the HTS field coil which is in the same direction as the first current and less than a current in the HTS material of the field coil.
A high temperature superconductor, HTS, magnet system comprising an HTS field coil and a power supply, wherein:
- the HTS field coil comprises:
- a plurality of turns comprising HTS material and a metallic stabiliser;
- an electrically conductive layer separating the turns, such that current can be shared between turns via the conductive layer;
- the power supply is configured to:
- provide DC current to the HTS field coil;
- and
- provide AC current to the HTS field coil in addition to the DC current in order to heat the field coil, the AC current having a period less than a time constant of the field coil and a magnitude less than the DC current.
A method of ramping down a high temperature superconductor, HTS, field coil, wherein the HTS field coil comprises a plurality of turns comprising HTS material and a metallic stabiliser and an electrically conductive layer separating the turns, such that current can be shared between turns via the conductive layer, the method comprising applying a second current to the HTS field coil in opposition to a first current flowing in the HTS material.
A method of ramping down a high temperature superconductor, HTS, field coil, wherein the HTS field coil comprises a plurality of turns comprising HTS material and a metallic stabiliser and an electrically conductive layer separating the turns, such that current can be shared between turns via the conductive layer, the method comprising applying a second current to the HTS field coil which is less than a first current flowing in the HTS material.
A method of heating a high temperature superconductor, HTS, field coil, wherein the HTS field coil comprises a plurality of turns comprising HTS material and a metallic stabiliser and an electrically conductive layer separating the turns, such that current can be shared between turns via the conductive layer, the method comprising applying a combined DC and AC current to the HTS field coil.
22-35. (canceled)
Dependencies are inferred from the claim text.