Abstract: A photocathode for electroradiographic and electrofluoroscopic apparatus which contains a stack arrangement of perforated foils of a material with a high atomic number, in particular, double layer perforated foils with two electrically conducting outer layers and an insulating layer arranged in between which obtains relatively high sensitivity and high resolution permitting its use in medical diagnostic apparatus is described along with method of manufacturing the photocathode.

Abstract: A method of producing a conductor for a superconducting cable or the like is disclosed. The conductor is made up of at least niobium and copper of which the copper is an electrically normal-conducting metal. The method includes heating a niobium carrier to a temperature between 150.degree. and 800.degree.C in a vacuum having a residual gas pressure of at most 10.sup.-.sup.4 Torr, and evaporating copper unto the niobium carrier to form a tightly adhering copper layer thereon. If required, the conductor can be produced to include other electrically normal-conducting metals.