Class / Patent application number | Description | Number of patent applications / Date published |
372002000 | FREE ELECTRON LASER | 12 |
20090290604 | Micro free electron laser (FEL) - 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. | 11-26-2009 |
20120106577 | METHOD FOR GENERATING FREE ELECTRONS AND FREE-ELECTRON LASER SYSTEM USING THE INTERACTION WITH A LASER UNDULATOR - 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. | 05-03-2012 |
20130083811 | HIGH-EFFICIENCY METHOD AND DEVICE, TO PRODUCE COHERENT SMITH-PURCELL RADIATION - 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. | 04-04-2013 |
20140153592 | DIRECTED-ENERGY IRRADIATING APPARATUS - A directed-energy irradiating apparatus includes an FEL apparatus | 06-05-2014 |
20140153593 | DIRECTED-ENERGY IRRADIATING APPARATUS - 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. | 06-05-2014 |
20140301414 | DEVICE AND METHOD FOR GENERATING COHERENT SMITH-PURCELL RADIATION - The invention relates to a device ( | 10-09-2014 |
20140301415 | SURFACE-MICROMACHINED MICRO-MAGNETIC UNDULATOR - 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. | 10-09-2014 |
20150063379 | GRAPHENE ILLUMINATOR, AND HEAT DISSIPATING APPARATUS AND OPTICAL TRANSMISSION NETWORK NODE USING THE GRAPHENE ILLUMINATOR - 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. | 03-05-2015 |
20150325975 | FEL System with Homogeneous Average Output - 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 M | 11-12-2015 |
20150340834 | METHOD FOR ENERGY DITHER OF A PARTICLE BEAM - 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. | 11-26-2015 |
20160020574 | Method and Arrangement to Generate Few Optical Cycle Coherent Electromagnetic Radiation in The EUV-VUV Domain - The present invention relates to a method and an arrangement to generate a coherent electromagnetic radiation containing at most a few optical cycles in the extreme ultraviolet/vacuum ultraviolet domain. The inventive method comprises the steps of providing an electron package ( | 01-21-2016 |
20170237225 | RADIATION SOURCE | 08-17-2017 |