Patents by Inventor Toshikazu Takatomi

Toshikazu Takatomi 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).

  • Photocathode high-frequency electron-gun cavity apparatus
    Patent number: 9224571
    Abstract: A photocathode high-frequency electron-gun cavity apparatus of the present invention is provided with a high-frequency acceleration cavity (1), a photocathode (8, 15), a laser entering port (9), a high-frequency power input coupler port (10), and a high-frequency resonant tuner (16). Here, the apparatus adopts an ultra-small high-frequency accelerator cavity which contains a cavity cell formed only with a smooth and curved surface at an inner face thereof without having a sharp angle part for preventing discharging, obtaining higher strength of high-frequency electric field, and improving high-frequency resonance stability.
    Type: Grant
    Filed: September 26, 2011
    Date of Patent: December 29, 2015
    Assignees: INTER-UNIVERSITY RESEARCH INSTITUTE CORPORATION, HIGH ENERGY ACCELERATOR RESEARCH ORGANIZATION
    Inventors: Junji Urakawa, Nobuhiro Terunuma, Toshikazu Takatomi
  • PHOTOCATHODE HIGH-FREQUENCY ELECTRON-GUN CAVITY APPARATUS
    Publication number: 20130187541
    Abstract: A photocathode high-frequency electron-gun cavity apparatus of the present invention is provided with a high-frequency acceleration cavity (1), a photocathode (8, 15), a laser entering port (9), a high-frequency power input coupler port (10), and a high-frequency resonant tuner (16). Here, the apparatus adopts an ultra-small high-frequency accelerator cavity which contains a cavity cell formed only with a smooth and curved surface at an inner face thereof without having a sharp angle part for preventing discharging, obtaining higher strength of high-frequency electric field, and improving high-frequency resonance stability.
    Type: Application
    Filed: September 26, 2011
    Publication date: July 25, 2013
    Inventors: Junji Urakawa, Nobuhiro Terunuma, Toshikazu Takatomi