Double-wall cryostat having electrical connections

Claim 1

In a double-wall cryostat formed by the interconnection of an inner wall and an outer wall in their upper part, the walls defining therebetween a hermetic enclosure in which there is disposed a detector element connected by an electrical connector means to circuits outside said enclosure, the improvement which comprises providing each of the two walls in their upper part with a flexible metallic sealing element, the two metallic sealing elements cooperating by contact for ensuring the hermetic interconnection of the two walls and the electrical connector means comprises a plurality of electrical conductors deposited on a thin band of insulating material and covered with a second thin band of insulating material, said electrical conductor means extending locally out of the hermetic enclosure between said sealing elements, the thinness of the electrical connector means and the ductility of the metallic sealing elements cooperating to enable the cryostat to be hermetically sealed even in the region where said electrical connector means passes through said sealing elements.