METHOD OF PRODUCING A SUPERCONDUCTING CABLE

摘要

A method of producing a superconducting cable, where a plurality of superconducting ribbons (4) are applied onto a preferably flexible tube (3), said ribbons being applied in one or more layers, optionally separated by intermediate plastic layers, whereafter a protective layer (5) of textile or paper is optionally applied followed by a metal tube (6). A plurality of film layers are applied onto the metal tube (6), a few of said layers being metal-coated. Subsequently, a number of preferably helical spacers (12) are applied onto these layers, and finally a screen (9) is placed on said spacers (12). In this manner the vacuum between the tubes (6 and 9) minimize the thermal conductivity at the same time as the metal-coated films block the thermal radiation. Compared to a conventional cryostate, an increase of the influx of heat is met by increasing the number of film layers and by inserting a predetermined number of aluminium-coated layers serving both as equipotential surfaces and as equitemperature surfaces.