Abstract:
An electron source includes a negative electron affinity photocathode on a light-transmissive substrate and a light beam generator for directing a light beam through the substrate at the photocathode for exciting electrons into the conduction band. The photocathode has at least one active area for emission of electrons with dimensions of less than about two micrometers. The electron source further includes electron optics for forming the electrons into an electron beam and a vacuum enclosure for maintaining the photocathode at high vacuum. In one embodiment, the active emission area of the photocathode is defined by the light beam that is incident on the photocathode. In another embodiment, the active emission area of the photocathode is predefined by surface modification of the photocathode. The source provides very high brightness from an ultra-small active emission area of the photocathode.
Abstract:
The invention relates to a lighting unit in which the gas discharge vessel consists of two or more adjacently situated tubular elements (legs) connected by means of a bridge-construction and where between these legs an electrically conductive element is being placed which is galvanicly connected with one of the electrodes (filaments) of the gas discharge lamp, preferably via a high-ohmic electrical resistor, where this conductive element functions as an additional help for ignition of the lamp and can be used also for light reflection purposes.
Abstract:
A microgap flat panel display which comprises a thin gas-filled display tube that utilizes switched X-Y "pixel" strips to trigger electron avalanches and activate a phosphor at a given location on a display screen. The panel utilizes the principal of electron multiplication in a gas subjected to a high electric field to provide sufficient electron current to activate standard luminescent phosphors located on an anode. The X-Y conductive strips of a few micron widths may, for example, be deposited on opposite sides of a thin insulating substrate, or on one side of the adjacent substrates and function as a cathode. The X-Y strips are separated from the anode by a gap filled with a suitable gas. Electrical bias is selectively switched onto X and Y strips to activate a "pixel" in the region where these strips overlap. A small amount of a long-lived radioisotope is used to initiate an electron avalanche in the overlap region when bias is applied. The avalanche travels through the gas-filled gap and activates a luminescent phosphor of a selected color. The bias is adjusted to give a proportional electron multiplication to control brightness for a given pixel. The application of the electrical bias to the X-Y network of strips can be done using standard electronic switching systems consisting of transistor arrays. With the proper layout of X-Y strips, monochrome or additive color pixels can be triggered to form a display conforming to any video standard, e.g. NTSC, PAL, or SECAM.
Abstract:
A cold cathode vacuum discharge tube, and method for making same, with an interior surface of the trigger probe (26) coated with carbon deposited by carbon vapor deposition (CVD) or diamond-like carbon (DLC) deposition. Preferably a solid graphite insert (84) is employed in the probe-cathode structure in place of an aluminum bushing employed in the prior art. The CVD or DLC probe face (90) is laser scribed to allow resistance trimming to match available trigger voltage signals and to reduce electrical aging.
Abstract:
This invention relates generally to the field of plasmas and, more particularly, to the creation of very high density stable plasmas inside solids. Very high density stable plasmas have many applications, including among many others, plasma solid fusion, transmutation reactions, matter, particles and energy storage, etc... For decades, scientists have tried unsuccessfully to increase the storage density of particles such as hydrogen through diverse methods such as liquefaction or magnetic confinement. To date the results have not been up to expectations. This invention provides the means and technique necessary to increase the density of particles to another order of magnitude by showing how to create a very high density stable plasma inside a solid. This invention also presents the means and techniques necessary to exploit some of the obvious applications, such as plasma solid fusion, energy, particles, and heat production, among many others.
Abstract:
An apparatus for generating neutrons and protons which includes a vacuum vessel having anode means substantially within vacuum vessel. The apparatus further includes at least one cathode wire grid which defines a central volume and is concave towards a central region of the vacuum vessel. The cathode wire grid is permeable to gas and to ions and disposed between the anode means. The apparatus further includes a means for introducing controlled amounts of reactive gas into the vacuum vessel and the central volume to obtain an internal pressure of the vacuum vessel. Finally, the apparatus includes means for applying an electric potential between the anode means and the cathode wire grid to produce a glow discharge caused by ions produced between the anode means and the cathode wire grid. The glow discharge is substantially determined by design criteria of the cathode wire grid and the internal pressure of the vacuum vessel.
Abstract:
A cathode assembly includes a substrate, a plurality of electrically conducting strips deposited on the substrate, and a continuous layer of diamond material deposited over the plurality of electrically conducting strips and portions of the substrate exposed between the plurality of electrically conducting strips.
Abstract:
A microelectronic field emitter device (50) comprising a substrate (78), a conductive pedestal (64) on said substrate, and an edge emitter electrode on said pedestal, wherein the edge emitter electrode comprises an emitter cap layer (66) having an edge (68). The invention also contemplates a current limiter for a microelectronic field emitter device, which comprises a semi-insulating material selected from the group consisting of SiO, SiO+Cr (0 to 50 wt.%), SiO2 + Cr (0 to 50 wt.%), SiO + Nb, Al2O3 and SixOyNz sandwiched between an electron injector and a hole injector. Another aspect of the invention relates to a microelectronic field emitter device comprising a substrate (240), an emitter conductor (242) on such substrate, and a current limiter stack (244) formed on said substrate, such stack having a top (246) and at least one edge (248, 250), a resistive strap (266) on top of the stack, extending over the edge in electrical contact with the emitter conductor; and an emitter electrode on the current limiter stack over the resistive strap.
Abstract:
An isotope separation method for use in the field of semiconductors is provided. The method is an improvement to the invention disclosed in OSIM patent application no. 95-01302 of 13.07.1995. Specifically, a method is provided for processing a semiconductor element having a cubic, rhombic or hexagonal crystalline structure and containing at least two stable isotopes, to enable the concentration of the various isotopes to be altered. The method comprises exposing the element to a temperature adjacent to its diffusion temperature, simultaneously applying to the element a 1 Amp, 4-30 KV electric current proportional to the ionisation energy expressed in Kcal/g mol, arranging the element being processed in a gaseous medium containing at least one inert gas to prevent oxidation of the element, and continuing the process for around 2 hours. An antimony (Sb) element with an isotope ratio of Sb 121 (P1,P2):Sb 123 (P3) = 1.70 is also provided.
Abstract:
An imaging apparatus (100) for providing an image from a display (106) to an observer (101), comprising: a display (106) generating an optical output, an imaging surface member (109) constructed and arranged for viewing by said observer, and a scanning mirror/lens assembly (102) optically interposed between the display and the imaging surface member, and constructed and arranged to motively repetitively scan the display, generate a scanned image, and transmit the scanned image to the imaging surface member, for viewing of the scanned image. Various field emitter display designs and subassemblies are described, which may be usefully employed in such imaging apparatus.