Abstract: A system and method to provide uniform, high intensity radially inwardly directed electron beams to the interior of a cylindrical volume for the purpose of destroying toxic, hazardous, or noxious organic and/or inorganic compounds contained in air or other media flowing through a cylindrical region; or to destroy or inactivate bacteria, viruses, fungi, or mold spores in such flowing media; to sterilize contents of flowing media; to treat fluidized grains, herbs, or other products; or to destroy chemical warfare agents. A window assembly to transmit electromagnetic radiation, for example, an electron beam, x-rays, or other high energy electromagnetic radiation, is also disclosed.

Abstract: A system and method to provide uniform, high intensity radially inwardly directed electron beams to the interior of a cylindrical volume for the purpose of destroying toxic, hazardous, or noxious organic and/or inorganic compounds contained in air or other media flowing through a cylindrical region; or to destroy or inactivate bacteria, viruses, fungi, or mold spores in such flowing media; to sterilize contents of flowing media; to treat fluidized grains, herbs, or other products; or to destroy chemical warfare agents. A window assembly to transmit electromagnetic radiation, for example, an electron beam, x-rays, or other high energy electromagnetic radiation, is also disclosed.

Abstract: There is described, for example, a generally cylindrical generator of energetic electrons that releases electrons from a vacuum enclosure into a surrounding space including into the atmosphere where the electrons may be used for a variety of applications including clean up of a flowing gas stream. Described is an efficient electron generator that emits more beam power than past structures in this class of devices and does so in connection with the treatment of gases or surfaces requiring treatment.

Abstract: An array of carbon nanotube electron sources to make an integrated array of RF (radio frequency) sources in a single vacuum envelope. The RF sources can be printed circuit traveling wave tubes.

Abstract: There is described a vacuum gauge in which an anode grid defines an ionization volume directly into which electrons are injected where they collide with gas molecules and atoms to form ions. A collector electrode is mounted within the ionization volume.

Abstract: There is described a vacuum gauge in which an anode grid defines an ionization volume directly into which electrons are injected where they collide with gas molecules and atoms to form ions. A collector electrode is mounted within the ionization volume.

Abstract: An electron source including a nanostructured carbon electron-emitting film and an electron extraction grid spaced closely adjacent the surface of said film.

Abstract: An electron source including a nanostructured carbon electron-emitting film and an electron extraction grid spaced closely adjacent the surface of said film.

Abstract: A cold emitter x-ray tube is provided comprised of a cathode which is a carbon nanotube or nanostructured carbon film which serves as the electron emission source in an x-ray tube, and is positioned on a suitable substrate. The nanostructured carbon film is selected from a group consisting of nanocyrstalline graphite, carbon nanotubes, diamond, diamond like carbon, or a composite of two or more of members of the group. An extraction/suppression grid may be utilized. A metal anode which functions as the x-ray generating target is positioned within the x-ray tube. A high voltage source with negative contact is connected to the emitter and the positive contact connected to the anode target. This single source of high potential serves to provide the electric field, between the emitter and anode, for extraction of electrons from the emitter and to accelerate the electrons to the target for generation of x-rays. X-rays pass through a beryllium window that is an integral part of the vacuum envelope.

Abstract: An electron gun for a vacuum tube employs a mounting element having an inner annular section with a defined thickness made to predetermined dimensional tolerances. The cathode subassembly is positioned on one surface of the annular section and a grid electrode is located on the opposing surface. When the mounting element is set within the vacuum tube facing the anode electrode, the location of the cathode subassembly and grid electrode in the mounting element establishes a precise cathode-to-anode spacing and the electrodes are properly aligned and concentric to a central axis along which the electron beam travels.

Abstract: A traveling wave tube having a helix continuously supported within a dielectric barrel provides efficient operation at high power levels. The wire forming the helix has a greater width along its inner surface adjacent the interaction space of the traveling wave tube than along its outer surface which is continuously secured to the dielectric barrel. The wire confines the electromagnetic field to an area adjacent the interaction space for low dielectric loading thereby assuring a good coupling impedance into and out of the traveling wave tube and a wide bandwidth. Improved thermal conductivity for heat from the helix is provided as a result of the helix being continuously supported and in contact with the dielectric barrel. The tube is low in cost, which makes it attractive for expendable use.