초록 ▼

A low thermal conductance support for a radiation shield in a magnetic resonance magnet is provided. Spacer means are situated partially in apertures in a cylindrical coil form having superconducting windings supported from a vacuum vessel. The spacer means are spaced away from the aperture walls an

A low thermal conductance support for a radiation shield in a magnetic resonance magnet is provided. Spacer means are situated partially in apertures in a cylindrical coil form having superconducting windings supported from a vacuum vessel. The spacer means are spaced away from the aperture walls and are secured at one end to the coil form. The spacer means protrude radially beyond the coil form surface and contact a radiation shield. The length of the spacer means is greater than the distance between the surface of the coil form and shield thereby increasing the thermal conduction path length between form and shield.

대표청구항 ▼

A magnetic resonance magnet comprising: a vacuum vessel; a cylindrical coil form having superconductor windings supported from said vacuum vessel, said coil form having a plurality of circumferentially spaced apertures extending from the surface of the cylindrical coil form inward; a radiation shiel

A magnetic resonance magnet comprising: a vacuum vessel; a cylindrical coil form having superconductor windings supported from said vacuum vessel, said coil form having a plurality of circumferentially spaced apertures extending from the surface of the cylindrical coil form inward; a radiation shield surrounding said coil form and spaced away therefrom; and spacer means situated partially in said apertures, spaced away from the aperture walls and secured at one end to said coil form, said spacer means protruding radially beyond the coil form surface and contacting said shield, the length of said spacer means being greater than the distance between the surface of the coil form and the shield thereby increasing the thermal conduction path length between coil form and shield.