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| Number | Title | Issue Date |
| 7764020 | Electro-permanent magnet for power microwave tubes A magnet configuration for a power microwave tube with a resonant cavity comprises a permanent magnet (110) with an axis-aligned through-bore (135) of sufficient size to contain the resonant cavity. The permanent magnet has an inner chamber (140... | 07/27/2010 |
| 7579779 | Pivotable magnetic assembly for allowing insertion or removal of a linear beam tube An electron beam tube device has a magnetic frame with the top part being pivotable so as to pivot from a closed position in which the top part, including an electromagnetic coil covers the electron beam tube to an open position in which the electron beam tube is un... | 08/25/2009 |
| 7394201 | Field emission cathode gating for RF electron guns and planar focusing cathodes A novel method of gating electron emission from field-emitter cathodes for radio frequency (RF) electrode guns and a novel cathode that provides a focused electron beam without the need for magnetic fields or a curved cathode surface are provided. The phase and stre... | 07/01/2008 |
| 7329980 | Shadow mask for cathode ray tubes Disclosed herein is a shadow mask for cathode ray tubes. When the width of a smaller hole part of each of slots formed at the shadow mask is defined as Sw, the horizontal distance between the end of a taper-shaped larger hole part facing the panel side of each of th... | 02/12/2008 |
| 7315126 | Folded waveguide traveling wave tube having polepiece-cavity coupled-cavity circuit An amplifying device comprises an electron gun emitting an electron beam, a collector spaced from the electron gun, the collector oriented to collect electrons of the electron beam emitted from the electron gun, and an interaction structure interposed between the el... | 01/01/2008 |
| 7206379 | RF accelerator for imaging applications The present invention is an RF cavity for accelerating electrons in imaging applications such as x-ray tubes and CT applications. An RF cavity having electron emitters placed therein accelerates the electrons across the cavity. The geometric shape of the cavity dete... | 04/17/2007 |
| 7196601 | Temperature correction of wigglers and undulators An undulator includes a periodic arrangement of magnets to produce a periodic spatial magnetic field distribution in a magnetic gap defined by the magnets. The undulator further includes a temperature-compensating material selectively arranged to compensate for a te... | 03/27/2007 |
| 7187130 | Electron beam tubes including a vacuum envelope seal and having a metallized balance ring A linear electron beam tube comprises an electron gun having a cathode and a grid, and an anode arranged in a first portion of a drift tube. The drift tube is within a vacuum envelope and has first and second portions separated by a gap at which point an electron be... | 03/06/2007 |
| 7129807 | Undulator and method of operation thereof In an undulator for the generation of synchrotron radiation from a particle beam introduced into the undulator, two partial undulators are provided each comprising a conductor of superconductive material which, when a current is conducted therethrough, generates an ... | 10/31/2006 |
| 7116051 | Multibeam klystron A multibeam, electrostatically focused klystron includes a plurality of conductive members, ones of which are recessed to provide input and output sections of microwave cavities, wherein focusing voltage is applied between those sections. The conductive members are ... | 10/03/2006 |
| 6998783 | Inductive output tube having a broadband impedance circuit An inductive output tube (IOT) provides improved efficiency and larger bandwidth. In one embodiment, an IOT is provided with an electron gun that generates an electron beam, a tube body, a collector for collecting the electron beam, and an extended-interaction outpu... | 02/14/2006 |
| 6998621 | Cooling of a device for influencing an electron beam A device for influencing an electron beam, in particular a beam deflector (10), comprises a cylindrical support body (11) with an axial passage (12) through which the beam can propagate and axially spaced sets of coils (14) supported by t... | 02/14/2006 |
| 6987361 | Field emission cathode gating for RF electron guns and planar focusing cathodes A novel method of gating electron emission from field-emitter cathodes for radio frequency (RF) electrode guns and a novel cathode that provides a focused electron beam without the need for magnetic fields or a curved cathode surface are provided. The phase and stre... | 01/17/2006 |
| 6984940 | Electronic tube with simplified collector The invention relates to amplifying electron tubes operating at microwave frequencies. The electron tube comprises: a pump-out tube that allows the vacuum inside the electron tube to be created; an electron gun that emits an electron beam inside the electron tube; a... | 01/10/2006 |
| 6966760 | Reciprocating fluid pump employing reversing polarity motor A reciprocating pump includes a drive section and a pump section. The drive section has a reciprocating coil assembly to which alternating polarity control signals are applied during operation. A permanent magnet structure of the drive section creates a magnetic flu... | 11/22/2005 |
| 6885152 | Multilayer field emission klystron An exemplary system and method for providing a multi-layer klystron-type electron beam device for the generation and amplification of millimeter-wave electromagnetic radiation is disclosed as comprising inter alia: a cathode layer (130); a collector layer ( | 04/26/2005 |
| 6870318 | Multiple stage depressed collector (MSDC) klystron based amplifier for ground based satellite and terrestrial communications A klystron tube for amplifying signals at microwave radio frequencies utilizes an electron source for emitting electrons through a field focused by a high energy magnet in the RF section of the tube. After the electrons have passed through the active area of the tub... | 03/22/2005 |
| 6847168 | Electron gun for a multiple beam klystron using magnetic focusing with a magnetic field corrector An RF device comprising a plurality of drift tubes, each drift tube having a plurality of gaps defining resonant cavities, is immersed in an axial magnetic field. RF energy is introduced at an input RF port at one of these resonant cavities and collected at an outpu... | 01/25/2005 |
| 6777877 | Gun-only magnet used for a multi-stage depressed collector klystron A klystron tube for amplifying signals at microwave radio frequencies utilizes an electron source for emitting electrons through a field focused by a high energy magnet in the RF section of the tube. After the electrons have passed through the active area of the tub... | 08/17/2004 |
| 6633129 | Electron gun having multiple transmitting and emitting sections An electron gun that generates multiple electron bunches and the application of this gun to produce rf energy. The electron gun includes an rf input cavity having a first side with multiple emitting surfaces and a second side with multiple transmitting an... | 10/14/2003 |
| 6617791 | Inductive output tube with multi-staged depressed collector having improved efficiency An inductive output tube (IOT) of a multi-staged depressed collector provides improved efficiency by approximating a Brillouin electron beam flow. In one embodiment, an IOT is provided with an electron gun that generates an electron beam, a tube body, a m... | 09/09/2003 |
| 6593695 | Broadband, inverted slot mode, coupled cavity circuit A coupled cavity circuit for a microwave electron tube comprises at least two resonant cavities adjacent to each other. An electron beam tunnel passes through the coupled cavity circuit to allow a beam of electrons to pass through and interact with the el... | 07/15/2003 |
| 6486605 | Multibeam electronic tube with magnetic field for correcting beam trajectory A multibeam electron tube with several approximately parallel electron beams passing through a body. Among the beams, at least some define an interbeam volume, each beam defining the interbeam volume being subjected to a perturbing azimuthal magnetic fiel... | 11/26/2002 |
| 6445130 | Axially polarized radiation from a toroidal magnetic structure with an equatorial slot A toroidal magnet structure for polarizing a magnetic wiggler and a synchrotron normal is provided. This structure comprises a toroid composed of a plurality of magic ring semicircular segments, with an equatorial slot extending about a periphery of the t... | 09/03/2002 |
| 6417622 | Broadband, inverted slot mode, coupled cavity circuit A coupled cavity circuit for a microwave electron tube comprises at least two resonant cavities adjacent to each other. An electron beam tunnel passes through the coupled cavity circuit to allow a beam of electrons to pass through and interact with the el... | 07/09/2002 |
| 6002988 | Method for optimizing the magnetic field of a periodic permanent magnet focusing device In accordance with the present invention, there is provided a method of profiling a total vector potential field of a periodic permanent magnetic field structure, wherein desired elements of the total vector potential field are known. The magnetic field s... | 12/14/1999 |
| 5959406 | Traveling wave tube with expanding resilient support elements A coupled cavity traveling tube employs a number of adjacent stacked annular magnetic coils (52a-52l) of insulated copper tape mounted on a housing (40) that contains an electron beam path (22) surrounded by a coupled cavity circuit (42,44). An electron b... | 09/28/1999 |
| 5939964 | Compact magnetic module for periodic magnetic devices A magnetic array for periodic magnetic devices is formed as a series of pole modules each constructed from rectangular components. Field strengths in excess of 2.0 T are achieved by surrounding each pole module on all available sides with magnet blocks. L... | 08/17/1999 |
| 5932971 | Optimally designed traveling wave tube for operation backed off from saturation A traveling wave tube and method of operation is disclosed. The traveling wave tube includes a slow wave structure such as a helix member provided with input and output ends and located within a tube member. An electron gun assembly is adjacent the input ... | 08/03/1999 |
| 5929732 | Apparatus and method for amplifying a magnetic beam An apparatus and method for creating a magnetic beam wherein a focusing magnet assembly (45) is comprised of a first opposing magnet pair (20) and a second opposing magnet pair (30) disposed in a focusing plane, each magnet of the respective opposing magn... | 07/27/1999 |
| 5909165 | Chiron twister A Chiron Twister magnet structure is provided from a right circular cylinder constructed of a passive material, such as iron, formed into a continuous helical bar deployed around a tunnel-like working space, in which it produces a transverse helical magne... | 06/01/1999 |
| 5828173 | Magnetic system for gyrotrons forming a wavy magnetic field In a magnetic system for gyrotrons, a permanent magnet arrangement is provided including a central radially polarized magnet, and axially polarized annular magnets disposed at opposite end faces of the central magnet and indirect contact therewith, the ma... | 10/27/1998 |
| 5821693 | Electron beam tubes having a unitary envelope having stepped inner surface An electron beam tube includes a unitary metal cylinder and a plurality of transverse walls located within it which define resonant cavities. As the cylinder is in one piece vacuum joints are only required at the ends of the structure. Drift spaces betwee... | 10/13/1998 |
| 5818170 | Gyrotron system having adjustable flux density A gyrotron system comprises an electron gun that produces an electron beam, a magnetic field generating unit comprising a permanent magnet and two electromagnets and capable of generating an axial magnetic field that drives electrons emitted from the elec... | 10/06/1998 |
| 5805044 | Field free chamber in permanent magnet solenoids A low-loss magnetic structure that provides an electron beam focusing field that can be accessed without field reversal. More specifically, the structure provides a uniform magnetic field that can be accessed from an adjacent field-free chamber within whi... | 09/08/1998 |
| 5744910 | Periodic permanent magnet focusing system for electron beam A focusing system for a helix TWT includes a polepiece structure for conducting magnetic flux to a drift tube of the TWT in a first general direction and conducting the magnetic flux from the drift tube in a second general direction perpendicular to the f... | 04/28/1998 |
| 5736820 | Cavity arrangements In an output resonant cavity used with a linear electron beam tube such as an IOT, magnetic material is mounted on walls of the cavity and defines annular channels within which coils are located to provide focusing of an electron beam travelling along the... | 04/07/1998 |
| 5714850 | Insertion device for use with synchrotron radiation The invention provides an insertion device for use with synchrotron radiation, including a horizontal undulator including a plurality of magnets linearly arranged along an axis of electron beams so that alternately positioned magnets have common polarity,... | 02/03/1998 |
| 5686802 | Method and apparatus for generating coherent particle beam Equipment for achieving uniformalization of energy and pulsing of a particle beam is installed in an accelerated charged particle-beam generator or particle-beam storage ring. For maximum efficiency, a CMC (cyclotron maser cooling) unit for achieving unif... | 11/11/1997 |
| 5638040 | Magnetic wiggler A magnetic wiggler is disclosed that allows the magnetic field to be readily adjusted to alter the characteristic energy of emitted synchrotron radiation. However, the source point and direction of the emitted x-ray spectrum do not change. Thus x-ray ener... | 06/10/1997 |
