Free Electron Laser Patents (Class 372/2)
  • Patent number: 10813208
    Abstract: A system uses one or more magnetrons to generate pulsed radio-frequency (RF) power, such as for powering an accelerating cavity. The one or more magnetrons each having a self-excitation threshold voltage and configured to operate with internal modulation using a pulsed RF input signal to produce the pulsed RF power when being powered by a direct-current power supply at a voltage level below the self-excitation threshold voltage.
    Type: Grant
    Filed: September 16, 2019
    Date of Patent: October 20, 2020
    Assignee: Muons, Inc.
    Inventor: Grigory M. Kazakevich
  • Patent number: 10483712
    Abstract: A method for varying the wavelength of a free electron laser (FEL) by applying an energy dither to the charged particles supplying the FEL. Bunches of charged particle beams are accelerated by cavities that are operated at a harmonic of the bunch repetition rate. The method involves adding one or more secondary radiofrequency accelerator cavities after the primary beam transport and near the wiggler to apply a fluctuation between individual bunches with a pseudo-random distribution. The secondary radiofrequency accelerator cavities provide fine variations of the beam energy about a nominal operating point. Operating a free electron laser (FEL) with a 1% change in the electron beam energy via the added secondary cavities will result in a 2% wavelength variation of the FEL output.
    Type: Grant
    Filed: March 5, 2019
    Date of Patent: November 19, 2019
    Assignee: JEFFERSON SCIENCE ASSOCIATES, LLC
    Inventors: Thomas Joseph Powers, David R. Douglas, Pavel Evtushenko, Stephen V. Benson, George Neil
  • Patent number: 10485089
    Abstract: A helical permanent magnet structure includes at least one magnet assembly. The magnet assembly includes a plurality of permanent magnets and poles. The permanent magnets are with a magnetization direction, and formed as helical shape and arranged as a helical surface, the center of the helical surface has a longitudinal passage for being passed through by a charged particle. The poles are with the same amount of the permanent magnets, wherein the poles are magnetized by the permanent magnets and absorb on one side of the permanent magnets.
    Type: Grant
    Filed: September 7, 2017
    Date of Patent: November 19, 2019
    Assignee: NATIONAL SYNCHROTRON RADIATION RESEARCH CENTER
    Inventors: Cheng-Ying Kuo, Cheng-Hsing Chang, Cheng-Hsiang Chang
  • Patent number: 10426022
    Abstract: A system uses one or more magnetrons to generate pulsed radio-frequency (RF) power, such as for powering an accelerating cavity. The one or more magnetrons each having a self-excitation threshold voltage and configured to operate with internal modulation using a pulsed RF input signal to produce the pulsed RF power when being powered by a direct-current power supply at a voltage level below the self-excitation threshold voltage.
    Type: Grant
    Filed: August 28, 2018
    Date of Patent: September 24, 2019
    Assignee: Muons, Inc.
    Inventor: Grigory M. Kazakevich
  • Patent number: 10367326
    Abstract: A method for applying an energy dither to a charged particle beam in order to vary the wavelength of the charged particle beam. Bunches of charged particle beams are accelerated by cavities that are operated at a harmonic of the bunch repetition rate. One or more secondary radiofrequency accelerator cavities are added near the wiggler after the primary beam transport to apply a fluctuation between individual bunches with a pseudo-random distribution. The secondary radiofrequency accelerator cavities provide fine variations of the beam energy about a nominal operating point. Operating a free electron laser (FEL) with a 1% change in the electron beam energy via the secondary cavity will result in a 2% wavelength variation of the FEL output.
    Type: Grant
    Filed: May 22, 2015
    Date of Patent: July 30, 2019
    Assignee: JEFFERSON SCIENCE ASSOCIATES, LLC
    Inventors: Thomas Joseph Powers, David R. Douglas, Pavel Evtushenko, Stephen V. Benson, George Neil
  • Patent number: 10283674
    Abstract: Described herein are solid-state devices based on graphene in a Field Effect Transistor (FET) structure that emits high frequency Electromagnetic (EM) radiation using one or more DC electric fields and periodic magnetic arrays or periodic nanostructures. A number of devices are described that are capable of generating and emitting electromagnetic radiation.
    Type: Grant
    Filed: September 6, 2017
    Date of Patent: May 7, 2019
    Assignee: P-BRANE, LLC
    Inventor: Jay P. Morreale
  • Patent number: 10185230
    Abstract: A measurement apparatus for measuring at least one property of an electron bunch or other group of charged particles travelling through a cavity (310), comprises a plurality of electrodes (302-308) arranged around the cavity, a plurality of optical sensors (322-328), wherein the plurality of electrodes are configured to provide signals to the optical sensors thereby to modulate at least one optical property of the optical sensors.
    Type: Grant
    Filed: March 10, 2016
    Date of Patent: January 22, 2019
    Assignee: ASML Netherlands B.V.
    Inventor: Willem Jakobus Cornelis Koppert
  • Patent number: 9871337
    Abstract: A method of varying the output of a free electron laser (FEL) on very short time scales to produce a slightly broader, but smooth, time-averaged wavelength spectrum. The method includes injecting into an accelerator a sequence of bunch trains at phase offsets from crest. Accelerating the particles to full energy to result in distinct and independently controlled, by the choice of phase offset, phase-energy correlations or chirps on each bunch train. The earlier trains will be more strongly chirped, the later trains less chirped. For an energy recovered linac (ERL), the beam may be recirculated using a transport system with linear and nonlinear momentum compactions M56, which are selected to compress all three bunch trains at the FEL with higher order terms managed.
    Type: Grant
    Filed: May 10, 2015
    Date of Patent: January 16, 2018
    Assignee: JEFFERSON SCIENCE ASSOCIATES, LLC
    Inventors: David R. Douglas, Robert Legg, R. Roy Whitney, George Neil, Thomas Joseph Powers
  • Patent number: 9853412
    Abstract: Passage through LINACs of electron bunches in their acceleration phase is coordinated with passage through the LINACs of electron bunches in their deceleration phase. Each successive pair of electron bunches are spaced in time by a respective bunch spacing, in accordance with a repeating electron bunch sequence. The electron source provides clearing gaps in the electron bunch sequence to allow clearing of ions at the undulator. The electron source provides the clearing gaps in accordance with a clearing gap sequence such that, for each of the plurality of energy recovery LINACS, and for substantially all of the clearing gaps: for each passage of the clearing gap through the LINAC in an acceleration phase or deceleration phase the clearing gap is coordinated with a further one of the clearing gaps passing through the LINAC in a deceleration phase or acceleration phase thereby to maintain energy recovery operation of the LINAC.
    Type: Grant
    Filed: July 27, 2015
    Date of Patent: December 26, 2017
    Assignee: ASML NETHERLANDS B.V.
    Inventors: Andrey Alexandrovich Nikipelov, Teis Johan Coenen, Wouter Joep Engelen, Gerrit Jacobus Hendrik Brussaard, Gijsbertus Geert Poorter, Erik Roelof Loopstra
  • Patent number: 9837786
    Abstract: The invention relates to a method for generating electromagnetic radiation (preferably UV, VUV, XUV, or X-rays), to an optical short-period undulator (10) and to a free-electron laser comprising the latter. To accomplish the method, a high-energy electrically charged particle beam (5) is provided, and high-intensity electromagnetic pulses (7, 7a, 7b) are generated, and by interfering said pulses with one another an electromagnetic standing wave is created, wherein said standing wave has an electric field strength of a pre-determined peak value. The particle beam is directed through the non-steady electromagnetic field of the standing wave in or in the vicinity of a plane spanned by nodes with maximal electric field strength of said electromagnetic standing wave.
    Type: Grant
    Filed: August 21, 2012
    Date of Patent: December 5, 2017
    Assignee: University of Pécs
    Inventors: Gábor Almási, János Hebling, Csaba Töke
  • Patent number: 9793437
    Abstract: Described herein are solid-state devices based on graphene in a Field Effect Transistor (FET) structure that emits high frequency Electromagnetic (EM) radiation using one or more DC electric fields and periodic magnetic arrays or periodic nanostructures. A number of devices are described that are capable of generating and emitting electromagnetic radiation.
    Type: Grant
    Filed: July 27, 2012
    Date of Patent: October 17, 2017
    Assignee: p-brane LLC
    Inventor: Jay P. Morreale
  • Patent number: 9697924
    Abstract: Coherent electronic current is generated by generating and transmitting an electron bunch along a longitudinal axis. The electron bunch is then directed onto a target, wherein the target imparts a transverse spatial modulation to the electron bunch via diffraction contrast or phase contrast. The transverse spatial modulation of the electron bunch is then transferred to the longitudinal axis via an emittance exchange beamline, creating a periodically modulated distribution of coherent electronic current.
    Type: Grant
    Filed: March 31, 2015
    Date of Patent: July 4, 2017
    Assignee: Massachusetts Institute of Technology
    Inventors: Emilio Alessandro Nanni, William Sproull Graves, Franz Xaver Kaertner, David Eugene Moncton
  • Patent number: 9647412
    Abstract: The disclosure relates to a free-electron laser system and a method for generating a packet of relativistic electrons capable of propagating in a first propagation direction (Oz), and a device for generating an undulator beam capable of interacting with the packet of relativistic electrons. In the system, the undulator beam results from combining, at an interaction area through which the propagation direction (Oz) of the packet passes, at least two laser beams propagating in different directions and each of which has at least one non-zero component in a plane orthogonal to the propagation direction (Oz) of the packet. The disclosure also relates to a method for generating a free-electron laser beam involving trapping and guiding a packet of relativistic electrons injected into an interaction area and implementing such a free-electron laser system.
    Type: Grant
    Filed: May 7, 2010
    Date of Patent: May 9, 2017
    Assignee: CENTRE NATIONAL DE LA RECHERCHE SCIENTIFIQUE (CNRS)
    Inventor: Philippe Balcou
  • Patent number: 9613726
    Abstract: Systems and methods are provided for reducing the storage time of spent nuclear fuel. In one embodiment, a method is provided that includes providing a sample of spent nuclear fuel and irradiating the spent nuclear fuel with substantially collimated gamma ray photons having energy levels of about 10 MeV to about 15 MeV for a predetermined time period to initiate a photofission reaction in the remaining fertile fissile material in the spent nuclear fuel.
    Type: Grant
    Filed: May 28, 2009
    Date of Patent: April 4, 2017
    Assignee: NORTHROP GRUMMAN SYSTEMS CORPORATION
    Inventor: Peter Moshchansky Livingston
  • Patent number: 9525479
    Abstract: There is provided a method for optimizing the configuration of an optical network which is adapted to transport optical traffic along a path from a source node to a destination node, wherein the path can be routed via any one or more of a plurality of intermediate nodes in the optical network. The method comprises the steps of receiving an operating parameter of an optical device monitored in a plurality of nodes. The received operating parameter is compared with a threshold value. An operating status of a node is determined based on the comparison of the received operating parameter with the threshold value. The determined operating status of a node is used as a routing criteria for computing a path for routing traffic through the optical network.
    Type: Grant
    Filed: January 24, 2012
    Date of Patent: December 20, 2016
    Assignee: TELEFONAKTIEBOLAGET LM ERICSSON (publ)
    Inventors: Michela Bevilacqua, Massimiliano Maggiari, Carla Marcenaro
  • Patent number: 9466940
    Abstract: A graphene illuminator includes two electrodes, an accelerating electric field power supply, and several magnet sets, and further includes a graphene material used for providing free-electrons. The two electrodes are respectively disposed on both sides or at both ends of the graphene material, and meanwhile are both disposed on a plane where the graphene material is disposed; a positive electrode and a negative electrode of the accelerating electric field power supply are respectively connected to the two electrodes, to apply, in a first direction, an accelerating electric field to the graphene material; and the magnet sets are disposed on upper and lower sides of the plane where the graphene material is disposed, to generate a magnetic field perpendicular to the plane where the graphene material is disposed, and South poles and North poles of the magnet sets are arranged alternately to generate an alternating magnetic field in a second direction.
    Type: Grant
    Filed: November 6, 2014
    Date of Patent: October 11, 2016
    Assignee: HUAWEI TECHNOLOGIES CO., LTD
    Inventors: Jian Ou, Peiyi Xiao
  • Patent number: 9392679
    Abstract: At least one method, apparatus and system for providing an extreme ultraviolet beam for processing semiconductor wafers are disclosed. A level of the EUV beam is monitored. A determination is made as to whether the level of the EUV beam is below a predetermined level. In response to determining that the level of the EUV beam is below the predetermined level, a determination is made as to whether the output of at least one of the first or second laser devices has decreased from an initial level. The output of the at least one of the first or second laser devices is increased in response to determining that the output of at least one of the first or second laser devices has decreased from an initial level.
    Type: Grant
    Filed: December 5, 2014
    Date of Patent: July 12, 2016
    Assignee: GlobalFoundries Inc.
    Inventor: Erik Robert Hosler
  • Patent number: 9359867
    Abstract: A method, apparatus and system for cooling a component of a downhole tool is disclosed. The apparatus includes a first desiccant configured to adsorb a refrigerant gas. A transmitter is configured to transmit electromagnetic energy into the first desiccant to enable desorption of the refrigerant gas from the first desiccant. A condenser condenses the desorbed refrigerant gas into a liquid phase. The condensed refrigerant evaporates from a liquid phase to a gaseous phase to cool the component. A second desiccant can be used, wherein the processor is configured to operate the cooling system in a first mode of operation in which the first desiccant is in thermal communication with the component and the second desiccant is thermally isolated from the component and a second mode of operation in which the second desiccant is in thermal communication with the component and the first desiccant is thermally isolated from the component.
    Type: Grant
    Filed: May 11, 2011
    Date of Patent: June 7, 2016
    Assignee: BAKER HUGHES INCORPORATED
    Inventors: Erik Pennewitz, Thomas Kruspe, Sebastian Jung
  • Patent number: 9263848
    Abstract: A directed-energy irradiating apparatus includes a switch which selects one of an FEL apparatus and an HPM apparatus to be supplied with a microwave based on external environmental data. A target is destroyed even in a situation in which a destruction effect by an FEL beam cannot be expected, while maintaining a destruction ability for the target by the FEL beam.
    Type: Grant
    Filed: June 4, 2013
    Date of Patent: February 16, 2016
    Assignee: MITSUBISHI HEAVY INDUSTRIES, LTD.
    Inventors: Shingo Nishikata, Yuki Uchiyama, Hiroyuki Daigo, Ryuichi Matsuda, Shinya Ishii, Hiroki Uchida
  • Patent number: 9130345
    Abstract: An extreme ultraviolet light generation system used with a laser apparatus may be provided, and the extreme ultraviolet light generation system may include: a chamber including at least one window for at least one laser beam and a target supply unit for supplying a target material into the chamber; and at least one polarization control unit, provided on a laser beam path, for controlling a polarization state of the at least one laser beam.
    Type: Grant
    Filed: January 10, 2014
    Date of Patent: September 8, 2015
    Assignee: GIGAPHOTON INC.
    Inventors: Tatsuya Yanagida, Osamu Wakabayashi
  • Patent number: 9105434
    Abstract: Methods and systems for electron emission are disclosed. An example system can comprise a cup-rod-needle assembly that can collect a source of electrons and allow internal space charge build-up and generation of an internal self-electric field build-up. The system can provide self-emission at a predetermined location of the needle in the system. An example system can comprise a cup-rod-needle assembly, an annular dielectric insulator as a plug, a source of electrons to provide electrons into a cup, and a beam drift tube.
    Type: Grant
    Filed: May 4, 2011
    Date of Patent: August 11, 2015
    Assignee: The Board Of Regents Of The Nevada System Of Higher Education On Behalf Of The University Of Nevada, Las Vegas
    Inventor: Robert A. Schill, Jr.
  • Patent number: 9005261
    Abstract: A therapeutic laser with a source of pulsed electromagnetic radiation, a control device for controlling the intensity and/or the duration of the therapeutic laser applied to the tissue, and a detection device for detecting optoacoustic signals triggered by irradiating the living tissue with the pulsed electromagnetic radiation. The therapeutic laser is characterized by an evaluation device that acts on the control device and is used for calculating a degree of quality B(t) from the optoacoustic signals detected by the detection device for individual laser pulses applied to a predetermined laser spot and determining a fit function f(t) at a predetermined point in time ?t1, the fit function f(t) approximating the mean curve of B(t) for 0?t??t1. The intensity and/or the irradiation time of the therapeutic laser is defined by the parameters for the predetermined laser spot, the parameters being determined for the fit function f(t).
    Type: Grant
    Filed: October 24, 2008
    Date of Patent: April 14, 2015
    Assignee: Medizinisches Laserzentrum Luebech GmbH
    Inventor: Ralf Brinkmann
  • Patent number: 9008131
    Abstract: Disclosed is a system for producing electromagnetic radiation with enhancement from a drift tube containing a cylindrical Smith-Purcell structure. The system includes a magnetically insulated linear oscillator. The oscillator includes a cylindrical resonant cavity having a traveling wave electron gun and a cooperating anode. The drift tube is formed of a hollow cylindrical conductive element that is positioned within a resonant cavity of the oscillator. The drift tube includes an inner surface and a pair of ends. The drift tube may be adapted such that the interaction between an electron beam, from the electron gun, passes through the inner space of the drift tube, and the internal grating, so as to produce RF radiation by the Smith-Purcell Effect. Spacing, face angle and shape of the grating, and the energy of the electron beam are determinants of the frequency of the RF radiation.
    Type: Grant
    Filed: March 26, 2013
    Date of Patent: April 14, 2015
    Assignee: Advanced Fusion Systems LLC
    Inventor: Curtis A. Birnbach
  • Publication number: 20150063379
    Abstract: A graphene illuminator includes two electrodes, an accelerating electric field power supply, and several magnet sets, and further includes a graphene material used for providing free-electrons. The two electrodes are respectively disposed on both sides or at both ends of the graphene material, and meanwhile are both disposed on a plane where the graphene material is disposed; a positive electrode and a negative electrode of the accelerating electric field power supply are respectively connected to the two electrodes, to apply, in a first direction, an accelerating electric field to the graphene material; and the magnet sets are disposed on upper and lower sides of the plane where the graphene material is disposed, to generate a magnetic field perpendicular to the plane where the graphene material is disposed, and South poles and North poles of the magnet sets are arranged alternately to generate an alternating magnetic field in a second direction.
    Type: Application
    Filed: November 6, 2014
    Publication date: March 5, 2015
    Applicant: HUAWEI TECHNOLOGIES CO., LTD.
    Inventors: Jian OU, Peiyi XIAO
  • Patent number: 8969752
    Abstract: The present invention provides a laser processing method comprising the steps of attaching a protective tape 25 to a front face 3 of a wafer 1a, irradiating a substrate 15 with laser light L while employing a rear face of the wafer 1a as a laser light entrance surface and locating a light-converging point P within the substrate 15 so as to form a molten processed region 13 due to multiphoton absorption, causing the molten processed region 13 to form a cutting start region 8 inside by a predetermined distance from the laser light entrance surface along a line 5 along which the object is intended to be cut in the wafer 1a, attaching an expandable tape 23 to the rear face 21 of the wafer 1a, and expanding the expandable tape 23 so as to separate a plurality of chip parts 24 produced upon cutting the wafer 1a from the cutting start region 8 acting as a start point from each other.
    Type: Grant
    Filed: September 11, 2003
    Date of Patent: March 3, 2015
    Assignee: Hamamatsu Photonics K.K.
    Inventors: Kenshi Fukumitsu, Fumitsugu Fukuyo, Naoki Uchiyama
  • Patent number: 8958444
    Abstract: A device (100) for generating a coherent Smith-Purcell radiation including an electrically conducting diffraction grating (102), laterally delimited by two electrically conducting external sidewalls (104); and a source (101) for generating an electron beam (103) and for emitting it so that it passes above the diffraction grating (102). The device (100) also includes one electrically conducting intermediate wall (105), parallel to the external sidewalls (104), located inside the diffraction grating (102) to form several similar elementary diffraction gratings (1061,1062). The source (101) emits an electron beam (103) with a speed and a current density adapted such that each elementary diffraction grating (1061,1062) emits a Smith-Purcell radiation on the fundamental mode. The elementary diffraction gratings (1061,1062) interact with each other to reduce the saturation time necessary for the Smith-Purcell radiation to be produced.
    Type: Grant
    Filed: April 4, 2014
    Date of Patent: February 17, 2015
    Assignee: Commissariat a l'Energie Atomique et aux Energies Alternatives
    Inventor: Jacques Gardelle
  • Patent number: 8908720
    Abstract: A directed-energy irradiating apparatus includes an FEL apparatus and an HPM apparatus. The FEL apparatus accelerates free electrons by using a microwave supplied from a microwave source to irradiate an FEL beam and outputs a remaining microwave. The HPM apparatus irradiates an HPM beam generated based on the remaining microwave outputted from the FEL apparatus. It is possible to destroy a target even in a situation that a destruction effect by the FEL beam cannot expected, while maintaining the destruction ability of the FEL beam.
    Type: Grant
    Filed: June 3, 2013
    Date of Patent: December 9, 2014
    Assignee: Mitsubishi Heavy Industries, Ltd.
    Inventors: Shingo Nishikata, Yuki Uchiyama, Hiroyuki Daigo, Ryuichi Matsuda, Shinya Ishii, Hiroki Uchida
  • Publication number: 20140301415
    Abstract: Various embodiments of undulators, methods of fabricating undulators, and systems incorporating undulators are described. Certain embodiments provide a compact, electromagnetic undulator. The undulator may comprise a substrate and one or more electromagnets, which may be formed on the substrate. Certain embodiments have a period not greater than about 5 mm. The undulator may be operatively coupled with a particle accelerator to provide a free electron laser system.
    Type: Application
    Filed: November 9, 2012
    Publication date: October 9, 2014
    Inventors: Jere Harrison, Abhijeet Joshi
  • Publication number: 20140301414
    Abstract: The invention relates to a device (100) for generating a coherent Smith-Purcell radiation comprising: an electrically conducting diffraction grating (102), laterally delimited by two electrically conducting external sidewalls (104); and a source (101) for generating an electron beam (103) and for emitting it so that it passes above the diffraction grating (102). According to the invention, the device (100) also comprises one electrically conducting intermediate wall (105), parallel to the external sidewalls (104), located inside the diffraction grating (102) to form several similar elementary diffraction gratings (1061,1062). The source (101) emits an electron beam (103) with a speed and a current density adapted such that each elementary diffraction grating (1061,1062) emits a Smith-Purcell radiation on the fundamental mode. The elementary diffraction gratings (1061,1062) interact with each other to reduce the saturation time necessary for the Smith-Purcell radiation to be produced.
    Type: Application
    Filed: April 4, 2014
    Publication date: October 9, 2014
    Applicant: Commissariat a l'energie atomique et aux energies alternatives
    Inventor: Jacques Gardelle
  • Publication number: 20140153593
    Abstract: A directed-energy irradiating apparatus invention includes a switch which selects one of an FEL apparatus and an HPM apparatus to be supplied with microwave based on external environmental data. A target is destroyed even in a situation that a destruction effect by a FEL beam cannot be expected, while maintaining the destruction ability for the target by the FEL beam.
    Type: Application
    Filed: June 4, 2013
    Publication date: June 5, 2014
    Inventors: Shingo NISHIKATA, Yuki UCHIYAMA, Hiroyuki DAIGO, Ryuichi MATSUDA, Shinya ISHII, Hiroki UCHIDA
  • Publication number: 20140153592
    Abstract: A directed-energy irradiating apparatus includes an FEL apparatus 20 and an HPM apparatus 30. The FEL apparatus 20 accelerates free electrons by using microwave supplied from a microwave source to irradiate an FEL beam and outputs remaining microwave. The HPM apparatus irradiates an HPM beam generated based on the remaining microwave outputted from the FEL apparatus. It is possible to destroy a target even in a situation that a destruction effect by the FEL beam cannot expected, while maintaining the destruction ability of the FEL beam.
    Type: Application
    Filed: June 3, 2013
    Publication date: June 5, 2014
    Inventors: Shingo NISHIKATA, Yuki UCHIYAMA, Hiroyuki DAIGO, Ryuichi MATSUDA, Shinya ISHII, Hiroki UCHIDA
  • Patent number: 8638824
    Abstract: High-efficiency method and device, to produce coherent Smith-Purcell radiation. A conductive diffraction grating, delimited by two conductive walls, is used, and an electron beam is passed above the grating to generate the radiation. According to the invention, the speed of the electrons is sufficiently low in order that, in a diagram (wave number k, frequency f), the beam line (I) intersects a portion (V) of a branch of the dispersion relationship, located in the first Brillouin zone, and corresponding to the grating's fundamental mode, at a point (P) located outside the zone delimited by the light lines (III, IV), and the current density of the beam is sufficiently high to excite the grating's fundamental mode which is radiated towards the outside thereof.
    Type: Grant
    Filed: October 2, 2012
    Date of Patent: January 28, 2014
    Assignee: Commissariat à l'énergie atomique et aux énergies alternatives
    Inventors: Jacques Gardelle, John-Thomas Donohue
  • Patent number: 8625643
    Abstract: A free electron laser system includes an undulator having a first and second series of magnets. The first and second series of magnets are substantially parallel to and spaced apart from each other to define a laser cavity between the magnets. An electron source emits an electron beam through the laser cavity. The magnets in the first and second series can have varying polarities. The magnets can be electromagnets with random phase distribution.
    Type: Grant
    Filed: October 22, 2012
    Date of Patent: January 7, 2014
    Assignee: Scidea Research, Inc.
    Inventor: Pat Sankar
  • Patent number: 8416026
    Abstract: A nanoscale serpentine ribbon is used to produce electromagnetic radiation by accelerating charge carriers as constrained along a serpentine path defined by the ribbon so that curve portions of the ribbon promote acceleration-induced emission of electromagnetic radiation by the charge carriers.
    Type: Grant
    Filed: February 16, 2011
    Date of Patent: April 9, 2013
    Assignee: Wisconsin Alumni Research Foundation
    Inventors: Robert H. Blick, Max G. Lagally
  • Publication number: 20130083811
    Abstract: High-efficiency method and device, to produce coherent Smith-Purcell radiation. A conductive diffraction grating, delimited by two conductive walls, is used, and an electron beam is passed above the grating to generate the radiation. According to the invention, the speed of the electrons is sufficiently low in order that, in a diagram (wave number k, frequency f), the beam line (I) intersects a portion (V) of a branch of the dispersion relationship, located in the first Brillouin zone, and corresponding to the grating's fundamental mode, at a point (P) located outside the zone delimited by the light lines (III, IV), and the current density of the beam is sufficiently high to excite the grating's fundamental mode which is radiated towards the outside thereof.
    Type: Application
    Filed: October 2, 2012
    Publication date: April 4, 2013
    Applicant: COMMISSARIAT A L'ENERGIE ATOMIQUE ET AUX ENERGIES ALTERNATIVES
    Inventor: COMMISSARIAT A L'ENERGIE ATOMIQUE ET A
  • Publication number: 20120209113
    Abstract: A non-linear FM pulse compression system includes a non-linear FM transmitter adapted to receive an input signal and transmit an output signal. The non-linear FM transmitter is adapted to modulate the frequency of the output signal by at least one of the following: increasing the frequency of the output signal as a logarithmic function of the frequency of samples in the input signal; modulating the frequency of the output signal in inversely proportional relationship to the frequency of samples in the input signal; and modulating the frequency of the output signal according to a random permutation of the frequency of the input signal. At least one antenna interfaces with the non-linear FM transmitter. A non-linear FM receiver interfacing with the at least one antenna. The non-linear FM receiver is adapted to auto-correlate the output signal with a return signal.
    Type: Application
    Filed: July 19, 2010
    Publication date: August 16, 2012
    Inventor: Pat Sankar
  • Patent number: 8218593
    Abstract: Optical devices include a doped glass material in which the dopant facilitates the transmission of energy out from the glass material. The doped glass may not significantly absorb a selected wavelength of laser radiation to be manipulated by the optical devices. The dopant may comprise one or more of a transition metal element, an actinide element, and a lanthanide element. Laser systems include at least one such optical device and a laser device configured to emit a beam to be manipulated by the optical device. Methods for forming optical devices and laser systems including such optical devices include dispersing a dopant within a glass material to form, and forming the glass material into a body having a size and shape configured to manipulate a beam of radiation emitted by a laser device. The dopant is selected to comprise a material that facilitates the transmission of energy out from the glass material.
    Type: Grant
    Filed: July 24, 2008
    Date of Patent: July 10, 2012
    Assignee: Alliant Techsystems Inc.
    Inventor: John S. Canham
  • Publication number: 20120106577
    Abstract: The disclosure relates to a free-electron laser system and a method for generating a packet of relativistic electrons capable of propagating in a first propagation direction (Oz), and a device for generating an undulator beam capable of interacting with the packet of relativistic electrons. In the system, the undulator beam results from combining, at an interaction area through which the propagation direction (Oz) of the packet passes, at least two laser beams propagating in different directions and each of which has at least one non-zero component in a plane orthogonal to the propagation direction (Oz) of the packet. The disclosure also relates to a method for generating a free-electron laser beam involving trapping and guiding a packet of relativistic electrons injected into an interaction area and implementing such a free-electron laser system.
    Type: Application
    Filed: May 7, 2010
    Publication date: May 3, 2012
    Applicant: CENTRE NATIONAL DE LA RECHERCHE SCIENTIFIQUE - CNRS
    Inventor: Philippe Balcou
  • Patent number: 8106717
    Abstract: A method includes causing a common-resonator mode resonating with a transition between |2>i and |3>i that are coupled to each other by a transition having a homogenous broadening ?Ehomo greater than an energy difference between |0>i and |1>i, an energy difference between |2>i and |3>i being greater than ?Ehomo, transferring states of m quantum bits represented by |0>k and |1>k to |4>k and |5>k, respectively, when a quantum-bit-gate operation using the common-resonator mode is executed between the quantum bits represented by m physical systems k, |E(|u>k)?E(|v>k)|>?Ehomo, u, v?{2, 3, 4, 5}, u?v, executing adiabatic passage between the physical systems k, using light that resonates with a transition between |3>k and |4>k and a transition between |3>k and |5>k, executing the quantum-bit-gate operation between the quantum bits, and transferring, to |0>k and |1>k, the states represented by |4>k and |5>k, respectively.
    Type: Grant
    Filed: September 17, 2009
    Date of Patent: January 31, 2012
    Assignee: Kabushiki Kaisha Toshiba
    Inventors: Kouichi Ichimura, Hayato Goto
  • Patent number: 7876793
    Abstract: A charged particle beam including charged particles (e.g., electrons) is generated from a charged particle source (e.g., a cathode or scanning electron beam). As the beam is projected, it passes between plural alternating electric fields. The attraction of the charged particles to their oppositely charged fields accelerates the charged particles, thereby increasing their velocities in the corresponding (positive or negative) direction. The charged particles therefore follow an oscillating trajectory. When the electric fields are selected to produce oscillating trajectories having the same (or nearly the same) frequency as the emitted radiation, the resulting photons can be made to constructively interfere with each other to produce a coherent radiation source.
    Type: Grant
    Filed: April 26, 2006
    Date of Patent: January 25, 2011
    Assignee: Virgin Islands Microsystems, Inc.
    Inventors: Jonathan Gorrell, Mark Davidson, Michael E. Maines
  • Patent number: 7869482
    Abstract: A semiconductor laser device is made of a group III nitride semiconductor having a major growth surface defined by a nonpolar plane or a semipolar plane. The semiconductor laser device includes a cavity having an active layer containing In and distributed Bragg reflectors coating both cavity end faces of the cavity respectively. In each of the distributed Bragg reflectors, a central wavelength ?c of a reflectance spectrum satisfies the relation ?SP?10 nm??c??SP+10 nm with respect to an emission peak wavelength ?SP of spontaneous emission in the active layer.
    Type: Grant
    Filed: April 2, 2009
    Date of Patent: January 11, 2011
    Assignee: Rohm Co., Ltd.
    Inventors: Masashi Kubota, Kuniyoshi Okamoto, Taketoshi Tanaka
  • Patent number: 7859199
    Abstract: The introduction of a magnetic electron beam orbit chicane between the wiggler and the downstream initial bending dipole in an energy recovering Linac alleviates the effects of radiation propagated from the downstream bending dipole that tend to distort the proximate downstream mirror of the optical cavity resonator.
    Type: Grant
    Filed: July 20, 2007
    Date of Patent: December 28, 2010
    Assignee: A Jefferson Science Associates, LLC
    Inventors: Stephen Benson, George Herman Biallas, David Douglas, Kevin Carl Jordan, George R. Neil, Michele D. Shinn, Gwyn P. Willams
  • Patent number: 7791052
    Abstract: A method of generating a single photon, includes preparing an optical resonator including a resonator mode of a resonance angular frequency ?c, preparing a material contained in the optical resonator, including a low energy state |g> and a high energy state |e>, and including a transition angular frequency ?a between |g>?|e> that is varied by an external field, applying, to the material, light of an angular frequency ?l different from the resonance angular frequency ?c, and applying a first external field to the material to vary the transition angular frequency ?a to resonate with the angular frequency ?l, such that a state of the material is changed to |e>, and then applying a second external field to the material to vary the transition angular frequency ?a to resonate with the resonance angular frequency ?c, such that the state of the material is restored to |g>.
    Type: Grant
    Filed: September 17, 2008
    Date of Patent: September 7, 2010
    Assignee: Kabushiki Kaisha Toshiba
    Inventors: Kouichi Ichimura, Hayato Goto
  • Patent number: 7728397
    Abstract: A nano-resonating structure constructed and adapted to couple energy from a beam of charged particles into said nano-resonating structure and to transmit coupled energy outside the nano-resonating structure. A plurality of the nano-resonant substructures may be formed adjacent one another in a stacked array, and each may have various shapes, including segmented portions of shaped structures, circular, semi-circular, oval, square, rectangular, semi-rectangular, C-shaped, U-shaped and other shapes as well as designs having a segmented outer surface or area, and arranged in a vertically stacked array comprised of one or more ultra-small resonant structures. The vertically stacked arrays may be symmetric or asymmetric, tilted, and/or staggered.
    Type: Grant
    Filed: May 5, 2006
    Date of Patent: June 1, 2010
    Assignee: Virgin Islands Microsystems, Inc.
    Inventors: Jonathan Gorrell, Mark Davidson, Jean Tokarz
  • Publication number: 20090290604
    Abstract: A charged particle beam including charged particles (e.g., electrons) is generated from a charged particle source (e.g., a cathode or scanning electron beam). As the beam is projected, it passes between plural alternating electric fields. The attraction of the charged particles to their oppositely charged fields accelerates the charged particles, thereby increasing their velocities in the corresponding (positive or negative) direction. The charged particles therefore follow an oscillating trajectory. When the electric fields are selected to produce oscillating trajectories having the same (or nearly the same) frequency as the emitted radiation, the resulting photons can be made to constructively interfere with each other to produce a coherent radiation source.
    Type: Application
    Filed: April 26, 2006
    Publication date: November 26, 2009
    Applicant: Virgin Islands Microsystems, Inc.
    Inventors: Jonathan Gorrell, Mark Davidson, Michael E. Maines
  • Patent number: 7560716
    Abstract: A beam of charged particles (e.g., an electron beam) from a charged particle source can be selectively applied to a pair of electrodes. For example, the charged particles can be electrons that are directed toward a first electrode when the charge difference between the electrodes is in one state and directed toward the second electrode when the charge difference between the electrodes is in another state. The electrodes are configured so that the beam of charged particles oscillates between the first and second electrodes.
    Type: Grant
    Filed: September 22, 2006
    Date of Patent: July 14, 2009
    Assignee: Virgin Islands Microsystems, Inc.
    Inventors: Jonathan Gorrell, Mark Davidson
  • Patent number: 7499476
    Abstract: An ultra-compact free electron laser comprising a pair of opposed superconducting cavities that produce identical electron beams moving in opposite directions such that each set of superconducting cavities accelerates one electron beam and decelerates the other electron beam. Such an arrangement, allows the energy used to accelerate one beam to be recovered and used again to accelerate the second beam, thus, each electron beam is decelerated by a different structure than that which accelerated it so that energy exchange rather than recovery is achieved resulting in a more compact and highly efficient apparatus.
    Type: Grant
    Filed: September 11, 2007
    Date of Patent: March 3, 2009
    Assignee: Jefferson Science Associates, LLC
    Inventor: Andrew Hutton
  • Patent number: 7466725
    Abstract: Quantum computer includes optical resonator including system group containing systems each having energy states highest-energy state |3>, and other two energy states |1> and |2>, fourth or more states |p>, transition angular frequency (?ij) between |i> and |j>, homogeneous broadening (??homo,ij) in transition angular frequency between |i> and |j>, optical resonator having resonator modes, ?ck of kth resonator mode, and emitting unit configured to emit light beam to system group, and wherein |?cl??cm|>??homo,23, system group includes system subgroups Aq having respective ?23 which resonate with respective ?cq of resonator modes, and emitting unit is arranged to apply light beam of two wavelengths and other light beam to s(1)th quantum bit Aqs(1) (s(1)1˜r) formed of r systems selected from each Aq, light beam of two wavelengths simultaneously causing two-photon resonance on Aq at ?12 or ?1p, other light beam simultaneously causing one-photon resonance on Aq at ?13 or ?p3.
    Type: Grant
    Filed: August 29, 2005
    Date of Patent: December 16, 2008
    Assignee: Kabushiki Kaisha Toshiba
    Inventors: Kouichi Ichimura, Hayato Goto, Noritsugu Shiokawa
  • Patent number: 7348569
    Abstract: 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 field to accelerate one or more charged particles.
    Type: Grant
    Filed: June 16, 2005
    Date of Patent: March 25, 2008
    Assignee: Massachusetts Institute of Technology
    Inventors: Thomas Feurer, Darius H. Torchinsky, Keith A. Nelson
  • Patent number: RE46383
    Abstract: A method for using a synchrotron, the method including the steps of: providing a synchrotron designed to accelerate a hadron beam to higher momenta; altering said synchrotron to enable deceleration of hadron beams to lower momenta; and using the synchrotron in said altering step in decelerating a hadron beam to lower momentum.
    Type: Grant
    Filed: November 20, 2006
    Date of Patent: May 2, 2017
    Assignee: HBAR TECHNOLOGIES, LLC
    Inventor: Gerald Peter Jackson