Termination for a superconductive cable

Termination for a superconductive cable comprising:

• a pressure-tight metal inner container in which there is a liquid refrigerant and into which the cable protrudes:
• and
• a metal outer container which is separated from the inner container by an intermediate space, said intermediate space being evacuated, wherein a first rupture diaphragm seals said inner container at a side opposite where said cable protrudes into said inner container and a second rupture diaphragm seals said outer container, on the same side as said first diaphragm and level with the first rupture diaphragm, wherein an evacuated relief space, which contains superinsulation and is sealed from the intermediate space with the vacuum insulation by a pressure-tight wall, is provided between the two rupture diaphragms, wherein said first and second rupture diaphragms are dimensioned to irreversibly rupture in the event that pressure within said inner container for said first rupture diaphragm and within said intermediate space for said second rupture diaphragm exceeds first and second predetermined thresholds respectively.