Matches 651 - 700 out of 778 < 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 >
Match Document Document Title
4591754 Electron gun for brightness  
An electron gun for high brightness including a LaB 6 single crystal cathode having a (100) plane on at least part of a main electron beam emission surface of a cathode tip having a top and a...
4578614 Ultra-fast field emitter array vacuum integrated circuit switching device  
A field-emitter switching device wherein a positive pulse is applied to a te (which is held at a bias potential V 1 just below turn-on). A collector is held at a potential higher than the gate in...
4567398 Liquid metal ion source  
A liquid metal ion source according to the present invention has a needle electrode disposed at a position spaced from a reservoir for holding a source material, and is provided with means for...
4551649 Rounded-end protuberances for field-emission cathodes  
Protuberances, or posts 14, for field-emission cathodes, the posts 14 having rounded emitting tips 12. Control of the radius R, of the emitting tips 12 controls the factor 10 8 /βV upon which the...
4495442 Cold-cathode magnetron injection gun  
A magnetron injection gun comprising a conical cold-cathode and a cylindrical anode coaxially surrounding the cold-cathode. The anode is provided with an annular projection extending toward the...
4486684 Single crystal lanthanum hexaboride electron beam emitter having high brightness  
I have discovered that an electron beam emitted from an LaB 6 single crystal cathode has higher brightness when a significant portion of the actual emitting surface of the LaB 6 crystal comprises...
4482839 Thermionic emission cathode and preparation thereof  
A thermionic emission cathode comprises a cathode tip made of an alkaline earth metal or rare earth metal hexaboride, a metallic support for supporting a base of said cathode tip and a reaction...
4482838 Thermionic emission cathode  
A thermionic emission cathode of a single crystal made of the calcium hexaboride type crystaline structure comprises a top surrounded by natural face inherent to the axial direction of the single...
4473771 Thermionic emitter for electron microscopy  
A tungsten filament intended as a thermionic source, made from a wire of which the zone defining the point is of a diameter smaller than that of the basal zone and where the diameter of the...
4468586 Shaped electron emission from single crystal lanthanum hexaboride with intensity distribution  
The shape of an electron beam emitted from an LaB 6 single crystal cathode can be controlled directly by shaping the cathode tip itself. The LaB 6 cathode is provided with a flat top surface...
4467240 Ion beam source  
An ion beam source characterized in that a needle-like tip is comprised of a carbide, a nitride, or a diboride of at least one element selected from the group consisting of Ti, Zr, Hf, V, Nb and...
4438371 Source of charged particles beam  
A source of charged particles beam which can be used either as an electron source or an ion source and has a tip formed of carbide, nitride or di-boride of at least one of elements Ti, Zr, Hf, V,...
4430570 Electron beam exposing apparatus  
A variable shaping type electron beam exposing apparatus is provided which comprises an electron gun which irradiates an electron beam from the front end of a cathode chip; shaping plates having...
4429250 Direct heating cathode for high frequency thermionic tube  
A direct heating thermionic emission cathode for high frequency tubes of the diode, tetrode or pentode type. It comprises a pyrolytic graphite support and a lanthanum hexaboride-based...
4427886 Low voltage field emission electron gun  
A field emission electron gun (10) is disclosed which has an extraction electrode, composed of one or more sharply pointed electrode tips (17) in close proximity to a field emission cathode tip...
4414487 Superconducting electron beam generator  
A superconducting electron beam generator comprising a cavity resonator situated in a refrigerator and containing a superconductive metal member fixed on the cavity end plate, a tip of which member...
4410832 EBS Device with cold-cathode  
Apparatus and method are described for fabricating a long life cold cathode lectron beam semiconductor device (EBS). Fabrication is given of a vacuum tube structure capable of sustaining...
4403168 High-voltage electrode consisting of a plurality of series-connected single electrodes for a spark-discharge device  
A high voltage electrode for a spark discharge device used in cooperation with an opposing roller electrode to roughen plastic sheets. The electrode is formed of a multiplicity of plates, or...
4396861 High voltage lead-through  
The invention contemplates lead-through structure for the high-voltage electrode of an electron microscope or the like, in conjunction with shaping of the high-voltage electrode and of the body of...
4379250 Field emission cathode and method of fabricating the same  
A field emission cathode of the present invention is characterized by the possession of a special layer which is adsorbed onto the surfaces of a tip that is joined to the top of a hairpin-shaped...
4346325 Electron gun  
An electron gun for a shaped beam type electron beam delineating system is provided with a cathode which is prepared from a single crystal of lanthanum hexaboride (LaB 6 ) the convex end portion of...
4345181 Edge effect elimination and beam forming designs for field emitting arrays  
The edge effect elimination and beam forming device uses a field effect electron emitter with a conductive material disposed over selected portions of the emitting fibers of the emitter, in...
4338164 Method for producing planar surfaces having very fine peaks in the micron range  
A method for producing planar surfaces having very fine peaks in the micron range or smaller, e.g. planar field emission cathodes, of conductive or semiconductive material, by filling cavities in a...
4325000 Low work function cathode  
Disclosed is an electron-beam cathode which emits electrons with a low work function over a relatively wide range of temperature and pressure. The cathode is comprised of single crystal tungsten...
4324999 Electron-beam cathode having a uniform emission pattern  
Disclosed is an electron-beam cathode which emits electrons in a cone-shaped pattern whose electron density is substantially uniform throughout the cone. The cathode is comprised of a needle-shaped...
4311941 Thermionic cathode supporting device  
A thermionic cathode supporting device which comprises an electroconductive member adapted to support a thermionic cathode tip and a tip supporting heaters which hold said tip, a pressing means for...
4307507 Method of manufacturing a field-emission cathode structure  
A method of manufacturing a field-emitter array cathode structure in which substrate of single crystal material is selectively masked such that the unmasked areas define islands on the underlying...
4288717 Thermionic cathode apparatus  
A thermionic cathode includes an electron emitting tip, lanthanum hexaboride tip supporting heaters in close contact with both sides of the tip and supporting the tip, and elastic electroconductive...
4272699 Electron impact ion source with field emission cathode  
A field emission cathode affording multiple emitting points, formed by a tiplicity of carbon fibers mounted on a conductive base, preferably in spaced clusters of about one thousand or more fibers,...
4258283 Cathode for electron emission  
A cathode assembly for electron emission, comprises, a heatable support of high-temperature resistant material, an emitter body of lanthanum hexaboride, and an auxiliary body having a surface...
4200821 Relativistic electron beam crossed-field device  
An intense relativistic crossed field device in a nested configuration wherein a field emission cathode is nested within a segmented annular anode with an annular gap separating the two.
4200555 Low work function hexaboride electron source  
An electron source using an electron emissive material having a composition represented by the nominal atom formula La x (Nd y Pr 1 -y) 1 -x B 6 ; x less than 0.5 and greater than 0.2, y less...
4193013 Cathode for an electron source and a method of producing the same  
A cathode for an electron source according to this invention comprises an emitter tip made of an electron emissive material, a filament for holding the emitter tip, and a binder for binding the...
4164680 Polycrystalline diamond emitter  
Ultrasharp diamond edges and points which are usable as high intensity point sources for the emission of electrons, ions, X-rays, coherent and incoherent light and high frequency electromagnetic...
4145635 Electron emitter with focussing arrangement  
An electron emitter comprises field emitter zones formed by projections of field emissive material separated by regions which are not field emissive. An extractor electrode for applying an electric...
4143292 Field emission cathode of glassy carbon and method of preparation  
A field emission cathode comprising a cathode base composed of carbon or a high-melting-point metal and a needle-shaped cathode composed of glassy carbon, which can provide a high field emission...
4137476 Thermionic cathode  
A thermionic cathode for an electron beam device is provided which comprises a first layer of thermoelectron emissive compound sharpened towards a point, a third layer of metal of high melting...
4103202 Ion projector head  
An ion projection head designed to provide a fairly uniform cloud of ions over a wide area for use in therapeutic and industrial applications, among others. The head, although being relatively...
4095133 Field emission device  
A field emission device and method of forming same, comprising a substrate on which at least one conical electrode is provided, which substrate, with the exception of the proximity of the tip of...
4088919 Ion source including a pointed solid electrode and reservoir of liquid material  
An ion source comprising an electrode consisting of at least one body made of a material such as to be perfectly wetted by a liquid material ions of which are to be emitted by the source and not...
4084942 Ultrasharp diamond edges and points and method of making  
Ultrasharp diamond edges and points which are usable as cutting instruments and as high intensity point sources for the emission of electrons, ions, x-rays, coherent and incoherent light and high...
4068145 Insulated elastic support and clamping means for resistance heaters and emitter tip of electron gun  
An electron gun having a thermionic emitter held by boron carbide heating members or the like, supported by electroconductive members which have additional elastic positioning members arranged to...
4055780 Thermionic emission cathode having a tip of a single crystal of lanthanum hexaboride  
A single crystal of lanthanum hexaboride is used as a tip of a thermionic emission cathode.
4054946 Electron source of a single crystal of lanthanum hexaboride emitting surface of (110) crystal plane  
An electron source using a single lanthanum hexaboride crystal oriented so the emitting surface is defined by a {110} crystal plane.
4041346 Electrochemical generation of field desorption emitters  
An electrochemically generated field desorption emitter for use in mass spectrometry, and a process for forming such an emitter by immersing a metal support, as a first electrode, and a second...
4028617 Ionization detector utilizing electric discharge  
The invention relates to an ionization detector comprising a discharge section which generates ultraviolet rays and a detector section which collects ionic current caused or altered by the...
4020387 Field emission electron gun  
A field emission gun in which a field emission tip for generating charged particles is axially aligned with apertures in an intermediate electrode and a main electrode. A field electrode is placed...
4019077 Field emission electron gun  
A field emission electron gun capable of generating a highly stabilized electron beam, comprises a cathode tip for emitting electrons, an anode for attracting and accelerating the electrons, and...
4015658 Apparatus for electric enhancement of heat transfer  
An apparatus is provided for increasing heat transfer from an object at a temperature above ambient by directing a localized corona discharge toward the heated object.
4008412 Thin-film field-emission electron source and a method for manufacturing the same  
A thin-film field-emission electron source having an emitter within a minute cavity in a conductive substrate, an insulating layer covering the surface of the substrate except for the portion of...
Matches 651 - 700 out of 778 < 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 >