Electron gun for indirectly heated impregnated cathode

Abstract

Abstract PURPOSE:To effectively use the heat diffused from a cathode substrate and a support cylinder by integrating a compound body consisting of a cylindrical body for heat reflection and a primary grid. CONSTITUTION:A cathode support rod 12 is secured on an insulating plate 7 such as alumina with holes for mounting cathodes in the position where the upper part of a cylinder centering around the holes for mounting the cathodes is trisected. A support cylinder 2 is secured to the cathode support rod 12 through a cathode support plate 9. A primary grid that is opposed to a cathode substrate 1' and has holes through which an electron beam passes and a compound used additionally as a cylindrical body for heat reflection that effectively uses the radiated heat diffused from the cathode substrate 1' and the support cylinder 2 are provided at the outside of the cathode substrate 1' and the support cylinder 2. The power consumption of a heater 3 can be reduced by using this electrode structure.

Inventors

• 👤 Yukio Honda
• 👤 幸雄 本多
• 👤 Tadanori Taguchi
• 👤 田口　貞憲
• 👤 Toshiyuki Aida
• 👤 会田　敏之
• 👤 Ushio Kawabe
• 👤 川辺　潮
• 👤 Akira Misumi
• 👤 三角　明

Bibliographic Details