3 results about "Electron heating" patented technology

Systems and methods to facilitate the formation and maintenance of FRCs with excellent stability and particle, energy, and flux confinement, and more particularly, systems and methods to facilitate the formation and maintenance of FRCs with elevated system energy and improved support using neutral beam injection and high-harmonic fast-wave electron heating.

The present application relates to an electron gun, which has a cathode having an electron emission surface, a planar shape of which is circular, and which emits electrons, a heater which warms the cathode, and an anode which applies a positive potential to the cathode and extracts the electrons in a certain direction. The cathode has a through-hole along a central axis of the cathode in a central portion thereof, and at least one of an opening edge portion of the through-hole on the electron emission surface side and an inner surface of the through-hole has a non-emission layer, or the opening edge portion of the through-hole on the electron emission surface side is a chamfered C face or a chamfered R face.

The present invention relates to an electron gun and a method for manufacturing the same, the electron gun comprising: a cathode which has an electron emission surface, has a circular planar shape, and emits electrons; a heater for raising the temperature of the cathode; and an anode for applying a positive potential to the cathode and leading out electrons in a certain direction. The cathode has a through-hole in the center portion thereof along the center axis of the cathode, and has a non-emission layer on at least one of the opening edge portion of the through-hole on the electron emission surface side and the inner surface of the through-hole, or the opening edge portion of the through-hole on the electron emission surface side is a chamfered C-surface or a chamfered R-surface.