The present disclosure relates to a manufacturing method for an electron emitting device using a graphite adhesive material. A method of preparing paste for forming a cathode of an electron emitting device includes: mixing and dispersing a nanomaterial for electron emission and a graphite filler in a solvent; drying a mixed solution in which the nanomaterial and the graphite filler are mixed; and preparing paste by mixing a graphite binder with the dried mixture.

The present disclosure relates to a manufacturing method for an electron emitting device using a graphite adhesive material. A method of preparing paste for forming a cathode of an electron emitting device includes: mixing and dispersing a nanomaterial for electron emission and a graphite filler in a solvent; drying a mixed solution in which the nanomaterial and the graphite filler are mixed; and preparing paste by mixing a graphite binder with the dried mixture.

A charged particle source is provided that exhibits small energy dispersion for charged particle beams emitted under a high angular current density condition and allows stable acquisition of large charged particle currents even for a small light source diameter. The charged particle source has a spherical virtual cathode surface from which charged particles are emitted, and the virtual cathode surface for charged particles emitted from a first position on a tip end surface of an emitter and the virtual cathode surface for charged particles emitted from a second position on the tip end surface of the emitter match each other.

The invention relates to an electron source comprising a conductive substrate, a conductor disposed facing the substrate, the electron source emitting an electron beam when the conductor is positively biased with respect to the substrate, and an electrically insulating crystal arranged on the substrate, facing the conductor, the substrate defining with the crystal a void including at least one peak located at a distance from the crystal, the crystal having, in a plane parallel to the substrate, dimensions of less than 100 nm and a thickness of less than 50 nm.

A triple-point cathode coating and method wherein electrically conductive NEA diamond particles cast or mixed with the adhesive medium and electrically insulative NEA diamond particles are cast or mixed with the adhesive medium to form a plurality of exposed junctions between electrically conductive diamond particles and electrically insulative diamond particles to reduce any electrical charges on a structure coated with the coating.

The disclosure includes an outer electrode and an inner electrode. The outer electrode defines an inner volume and is configured to receive injected electrons through at least one aperture. The inner electrode positioned in the inner volume. The outer electrode and inner electrode are configured to confine the received electrons in orbits around the inner electrode in response to an electric potential between the outer electrode and the inner electrode. The apparatus does not include a component configured to generate an electron-confining magnetic field.

The disclosure includes an outer electrode and an inner electrode. The outer electrode defines an inner volume and is configured to receive injected electrons through at least one aperture. The inner electrode positioned in the inner volume. The outer electrode and inner electrode are configured to confine the received electrons in orbits around the inner electrode in response to an electric potential between the outer electrode and the inner electrode. The apparatus does not include a component configured to generate an electron-confining magnetic field.

A light modulated electron source utilizes a photon-beam source to modulate the emission current of an electron beam emitted from a silicon-based field emitter. The field emitter's cathode includes a protrusion fabricated on a silicon substrate and having an emission tip covered by a coating layer. An extractor generates an electric field that attracts free electrons toward the emission tip for emission as part of the electron beam. The photon-beam source generates a photon beam including photons having an energy greater than the bandgap of silicon, and includes optics that direct the photon beam onto the emission tip, whereby each absorbed photon creates a photo-electron that combines with the free electrons to enhance the electron beam's emission current. A controller modulates the emission current by controlling the intensity of the photon beam applied to the emission tip. A monitor measures the electron beam and provides feedback to the controller.

A carbon nanotube field emitter comprises at least two electrodes and at least one graphitized carbon nanotube structure. The at least one graphitized carbon nanotube structure comprises a first end and a field emission end. The first end is opposite to the field emission end. The first end is fixed between the at least two electrodes, and the field emission end is exposed from the at least two electrodes and configured to emit electrons.

A carbon nanotube field emitter comprises at least two electrodes and at least one graphitized carbon nanotube structure. The at least one graphitized carbon nanotube structure comprises a first end and a field emission end. The first end is opposite to the field emission end. The first end is fixed between the at least two electrodes, and the field emission end is exposed from the at least two electrodes and configured to emit electrons.