Commissariat a L'energie Atomique

Claude Legressus

Claude Faure

Pierre Bach

Daniel Massignon

Bruno Blanchard

Rene Sopizet

Rene Stefani

Process for the production of an electrical insulant (5) placed in an intense electrical field, particularly between two electrodes (1, 2) of an electron tube. The insulant (5) is a crystalline material, whose free surfaces (7) in vacuo (6) have been treated so as to reduce or eliminate crystallization defects. The treatment is checked by measurements of a particular optical or mechanical property of the free surfaces. The breakdown voltage can be multiplied by three or four compared with conventional insulants and can approach the breakdown voltage of the vacuum.

Process for the production of an electrical insulant with a high

The method for controlling the migration of an electronegative chemical species within a solid substrate which exhibits ionic conduction consists in irradiating the substrate with electrons which have sufficient energy to penetrate into the substrate and to produce therein metastable excited negative ions of said species and in applying to said substrate an electric field having a direction opposite to the desired direction of migration.

Method for controlling the migration of a chemical species within a

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Fontenay le Fleury, France

Claude Legressus