Patents by Inventor Henri Doucet

Henri Doucet has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).

  • Free-electron laser provided with a device for producing a pulsed magnetic field with periodic spatial variations
    Patent number: 4345329
    Abstract: A magnetic field having an alternate component in a predetermined direction is produced in a zone and electrons are injected into this zone perpendicularly to said direction. To this end a winding is connected to a source for supplying current pulses having a predetermined duration. A split tube is placed coaxially within the winding and has an inner wall which provides periodic or nearly periodic variations. The split tube is formed of material having good electrical conductivity and has a skin thickness which is considerably smaller than the tube thickness at the frequency corresponding to the reciprocal of the time-duration of the current pulses.
    Type: Grant
    Filed: December 20, 1979
    Date of Patent: August 17, 1982
    Assignee: Agence Nationale de Valorisation de la Recherche (ANVAR)
    Inventors: Henri Doucet, Christian Tournes