|
Match
|
Document |
Document Title |
|
|
7348569 |
Acceleration of charged particles using spatially and temporally shaped electromagnetic radiation
A method and apparatus for accelerating charged particles are disclosed, wherein the method comprises using at least a transverse component of a temporally and spatially shaped electromagnetic...
|
|
|
7183564 |
Channel spark source for generating a stable focused electron beam
In a channel spark source triggered by gas discharge for generating a stable focused electron beam, a gas supply for a hollow cathode thereof is provided which generates in the hollow cathode a...
|
|
|
7145297 |
L-band inductive output tube
An inductive output tube (IOT) operates in a frequency range above 1000 MHz. An output window may be provided to separate a vacuum portion of the IOT from an atmospheric pressure portion of the...
|
|
|
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...
|
|
|
6574248 |
Laminated wigglers
A wiggler that, when used in a free electron laser, reduces the harmonicity of the light emitted from the free electron laser. In general, the reduced harmonicity is accomplished by making the...
|
|
|
6556595 |
Hybrid wiggler
Disclosed is a novel hybrid wiggler as a kind of insertion devices, for example, in an electron accelerator. Different from a conventional hybrid wiggler consisting of two oppositely facing arrays...
|
|
|
6476558 |
Mode converter and gyrotron tube provided with mode converter for converting mode of millimeter waves
In a substantially circular waveguide constituting a mode converter in a gyrotron tube, there is a region whose transverse inner surface shape changes to a non-true circular shape from a true...
|
|
|
6448850 |
Electromagnetic wave amplifier and electromagnetic wave generator
An electromagnetic wave amplifier and an electromagnetic wave generator operate using electron beams in a vacuum environment. The amplifier, arranged in a vacuum environment, comprises an electron...
|
|
|
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,...
|
|
|
6424090 |
Modification of millimetric wavelength microwave beam power distribution
A system and method for increasing the power density distribution uniformity of a gyrotron radiation beam provides a mirror for reflecting the gyrotron beam onto an object to be irradiated, where...
|
|
|
5777572 |
Device for damaging electronic equipment using unfocussed high power millimeter wave beams
A device for damaging electronic equipment has a millimeter wave generator, such as a gyrotron oscillator, for producing very high power millimeter waves. A beam former antenna forms the millimeter...
|
|
|
5723949 |
Spherical magnet structure and use thereof in wiggler radiation source
A spherical magnet structure having a cavity centrally disposed therein at an axis therethrough, is constructed to distribute a magnetic field in the cavity with the magnitude thereof varying...
|
|
|
5719469 |
Spherical magnet having a gap with a periodically varying field for a wiggler radiation source
A spherical magnet structure having an axis about which an equatorial gap disposed into the periphery thereof, is constructed to sustain a magnetic field across the gap with the field magnitude...
|
|
|
5610482 |
Gyrotron and method of improving its efficiency
In a gyrotron comprising a cathode with an emitter ring, an accelerating anode, a resonator, a collector, and an uncoupling conduit, an arrangement is disposed around the resonator which generates...
|
|
|
5536992 |
Linear electron beam tubes arrangements
An inductive output tetrode includes a cylindrical ceramic envelope within which is located an electron gun including a cathode and grid. An annular resonant input cavity into which a high...
|
|
|
5280490 |
Reverse guide field free electron laser
An electromagnetic radiation amplification device comprising an electron gun for introducing a stream of electrons into an electron drift tube/wavequide in which an axial magnetic field and a...
|
|
|
5144193 |
High field pulsed microwiggler comprising a conductive tube with periodically space slots
A microwiggler assembly produces large magnetic fields for oscillating ched particle beams, particularly electron beams for free electron laser (FEL) application. A tube of electrically conductive...
|
|
|
5099175 |
Tunability enhanced electromagnetic wiggler
The invention discloses a wiggler used in synchrotron radiation sources and free electron lasers, where each pole is surrounded by at least two electromagnetic coils. The electromagnetic coils are...
|
|
|
5052003 |
Quasi-optical gyrotron
In a quasi-optical gyrotron, two coils (3a, 3b) in a Helmholtz arrangement generrate a static magnetic field aligned parallel to an electron beam axis (2). As a result, the electrons passing along...
|
|
|
5030929 |
Compact waveguide converter apparatus
Conversion from a whispering gallery or volume mode to a more useable mode, such as the HE1,1 mode is achieved in a waveguide mode converter that includes input and output sections. The input...
|
|
|
5015914 |
Couplers for extracting RF power from a gyrotron cavity directly into fundamental mode waveguide
In a gyrotron cavity resonator, generated energy is extracted into a symmetric set of fundamental-mode waveguides by ports disposed to couple energy in phase from the operating electromagnetic mode...
|
|
|
4939740 |
Cyclotron autoresonance maser with helical electron guiding center
A cyclotron autoresonance maser includes an evacuated drift tube with a first end, a second end and an axis. An electron gun introduces a beam of relativistic electrons to the drift tube first end...
|
|
|
4926094 |
High-performance gyrotron for production of electromagnetic millimeter or submillimeter waves
This invention relates to a high-performance gyrotron for the production of electromagnetic millimeter or submillimeter waves with a quasi-optical resonator. The latter is formed by two concave...
|
|
|
4926093 |
Gyrotron device
A gyrotron device according to the present invention, having an electron gun for emitting an electron beam having an annular cross seciton, coils for applying a magnetic field to the electron beam...
|
|
|
4897609 |
Axially coupled gyrotron and gyro TWTA
A tilt-angle gun provides a conically-shaped electron beam formed in a magnetically-shielded region which is injected into a coaxial waveguide of the amplifier embodiment of the invention and into...
|
|
|
4876687 |
Short-period electron beam wiggler
A free-electron laser has a wiggler for a linear electron beam comprising two sets of magnetic polepieces 26, 28 periodically spaced along opposite sides of the beam. The polepieces of one set 28...
|
|
|
4855644 |
Crossed double helix slow-wave circuit for use in linear-beam microwave tube
A helix slow-wave circuit for use in a linear-beam microwave tube device, comprises a first helix formed by a first wire-like member wound in a first sense at a plurality of turns, and a second...
|
|
|
4839561 |
Gyrotron device
A gyrotron device including an electron gun for emitting a hollow electron beam, solenoid coils for generating magnetic fields so as to produce a cyclotron movement to the electron beam emitted...
|
|
|
4829527 |
Wideband electronic frequency tuning for orotrons
An orotron for generating near millimeter wavelength radiation at a selectable output frequency within a wide frequency range, in which the orotron output power is automatically tuned...
|
|
|
4819238 |
Wide band free electron laser with variable phase and frequency
A free electron laser (FEL) is disclosed in which the phase of the output electromagnetic beam is inherently adjustable without the use of any extraneous optical phase shifting materials. This is...
|
|
|
4792725 |
Instantaneous and efficient surface wave excitation of a low pressure gas or gases
A system for instantaneously ionizing and continuously delivering energy in the form of surface waves to a low pressure gas or mixture of low pressure gases, comprising a source of rf energy, a...
|
|
|
4789808 |
Gyrotron device with adjustable pitch factor
In gyrotron devices, pitch factor and efficiency are directly proportional. When the pitch factor is increased, however, a larger starting current is needed. The available power supply thus limits...
|
|
|
4782303 |
Current guiding system
The magnetomotive force of a current produces a magnetic field in magnetic material which encircles the current. Although magnetic material attracts a current, material having vanes repels the...
|
|
|
4767969 |
RF emission shield for CRT displays
Certain applications require a CRT display to be well shielded against emitting RF electromagnetic energy. A shield placed at the neck portion of a CRT envelope inhibits RF emissions from being...
|
|
|
4761584 |
Strong permanent magnet-assisted electromagnetic undulator
This invention discloses an improved undulator comprising a plurality of electromagnet poles located along opposite sides of a particle beam axis with alternate north and south poles on each side...
|
|
|
4760311 |
Sub-nanosecond rise time multi-megavolt pulse generator
A sub-nanosecond rise time megavolt pulse generator is disclosed. The generator utilizes an induction energy store together with electron beams for generating a sub-nanosecond high voltage pulse...
|
|
|
4754196 |
Axial injection orbitron
An apparatus and method for generating high power electro magnetic radiation in the millimeter or submillimeter range axial injection and adiabatic compression of an electron beam using large...
|
|
|
4751429 |
High power microwave generator
A device (10) for producing high-powered and coherent microwaves is described. The device comprises an evacuated, cylindrical, and hollow real cathode (20) that is driven to inwardly field emit...
|
|
|
4749906 |
Multiple beam lasertron
The invention relates to multiple beam lasertrons. The n (n: integer greater than 1) electron beams of the lasertron are obtained from the same laser beam from which n secondary laser beams are...
|
|
|
4748378 |
Ionized channel generation of an intense-relativistic electron beam
A foilless intense relativistic electron beam generator uses an ionized cnel to guide electrons from a cathode passed an anode to a remote location.
|
|
|
4745336 |
Microwave generation by virtual cathode with phase velocity matching
The present invention provides a vircator with improved efficiency. An elongated anode is aligned with an elongated cathode so as to produce an elongated virtual cathode when a direct current...
|
|
|
4743804 |
E-beam ionized channel guiding of an intense relativistic electron beam
An IREB is guided through a curved path by ionizing a channel in a gas with electrons from a filament, and confining the electrons to the center of the path with a magnetic field extending along...
|
|
|
4733131 |
Multiple-beam klystron
The dimensions of the resonant cavities of the multiple-beam klystron are determined in such a way as to enable functioning in the TM0n mode (n=a whole number greater than 1) and drift tubes...
|
|
|
4733133 |
Method and apparatus for producing microwave radiation
A method and apparatus are disclosed for producing microwave radiation wherein a generally stable, high-beta, relativistic electron plasma is formed and magnetically confined in a magnetic mirror...
|
|
|
H000450 |
Magnetic field adjustment structure and method for a tapered wiggler
An improved method and structure is disclosed for adjusting the magnetic field generated by a group of electromagnet poles spaced along the path of a charged particle beam to compensate for energy...
|
|
|
4728860 |
Slidable seal for klystron vacuum tubes
An external cavity klystron vacuum tube has a ceramic cylindrical wall surrounded by an external cavity within which is an output probe. The cylindrical wall section is sealed at its ends to other...
|
|
|
4727550 |
Radiation source
An improved radiation source is disclosed, exploiting the spontaneous radiation generated from the interaction of an electron beam and a conductive grating. Conditions are defined for generating...
|
|
|
4715038 |
Optically pulsed electron accelerator
An optically pulsed electron accelerator can be used as an injector for a free electron laser and comprises a pulsed light source, such as a laser, for providing discrete incident light pulses. A...
|
|
|
4705988 |
Device for guiding an electron beam
A device for guiding an electron beam from an electron gun to a microwave resonator in a microwave source operating according to the gyrotron principle, including a beam duct for guiding the...
|
|
|
4703228 |
Apparatus and method for providing a modulated electron beam
An electron gun for emitting a modulated electron beam. The gun includes an evacuated envelope having an output end with a photocathode positioned in the envelope and responsive to light to emit...
|