Magnetic Field Acceleration Means Patents (Class 315/501)
  • Patent number: 10131453
    Abstract: A Hall effect thruster arranged inside a wall and including a magnetic circuit and an electric circuit including an anode, a first cathode, and a voltage source. The magnetic circuit and the electric circuit are arranged in such a manner as to generate magnetic and electric fields around the wall. In every meridian section, the magnetic circuit presents an upstream magnetic pole and a downstream magnetic pole arranged at the surface of the wall and spaced apart from each other; and the anode and the first cathode are situated on either side of the upstream magnetic pole.
    Type: Grant
    Filed: January 28, 2016
    Date of Patent: November 20, 2018
    Assignee: SAFRAN AIRCRAFT ENGINES
    Inventors: Frederic Raphael Jean Marchandise, Vanessa Vial, Stephan Zurbach
  • Patent number: 9734926
    Abstract: A hybrid nuclear reactor for producing a medical isotope includes an ion source for producing an ion beam from a gas, a target chamber including a target that interacts with the ion beam to produce neutrons, and an activation cell positioned proximate the target chamber and including a parent material that interacts with the neutrons to produce the medical isotope via a fission reaction.
    Type: Grant
    Filed: May 1, 2009
    Date of Patent: August 15, 2017
    Assignee: SHINE MEDICAL TECHNOLOGIES, INC.
    Inventor: Gregory Piefer
  • Patent number: 9355767
    Abstract: A method and apparatus for implementing dynamic compensation of magnetic forces for undulators are provided. An undulator includes a respective set of magnet arrays, each attached to a strongback, and placed on horizontal slides and positioned parallel relative to each other with a predetermined gap. Magnetic forces are compensated by a set of compensation springs placed along the strongback. The compensation springs are conical springs having exponential-force characteristics that substantially match undulator magnetic forces independently of the predetermined gap. The conical springs are positioned along the length of the magnets.
    Type: Grant
    Filed: September 3, 2014
    Date of Patent: May 31, 2016
    Assignee: UChicago Argonne, LLC
    Inventors: Efim Gluskin, Emil Trakhtenberg, Joseph Z. Xu
  • Patent number: 9355784
    Abstract: A variable rotating capacitor or RotCo 5 that can be connected via a transmission line 3 to the dee 2 of a synchrocyclotron 1 so as to adjust a resonant frequency of the synchrocyclotron as a function of time and which comprises a cylindrical rotor 10 and a cylindrical stator 20 that are coaxial with the Z axis. The rotor comprises a plurality of circumferentially-distributed rotor electrodes 11 extending parallel to its rotation axis Z. The stator comprises a plurality of circumferentially-distributed stator electrodes 21 extending parallel to the rotation axis Z. Each stator electrode 21 consists of a single metal plate and all said plates are distributed over one and the same stator circumference 25. This makes it possible for the RF currents in the electrodes to be better distributed and thus reduces the local overheating. The present invention also relates to a synchrocyclotron comprising such a RotCo.
    Type: Grant
    Filed: January 25, 2012
    Date of Patent: May 31, 2016
    Assignee: Ion Beam Applications, SA
    Inventor: Michel Abs
  • Patent number: 9040936
    Abstract: A method of bunch length compression method for a free electron laser (FEL) that avoids parasitic compressions by 1) applying acceleration on the falling portion of the RF waveform, 2) compressing using a positive momentum compaction (R56>0), and 3) compensating for aberration by using nonlinear magnets in the compressor beam line.
    Type: Grant
    Filed: October 1, 2014
    Date of Patent: May 26, 2015
    Assignees: JEFFERSON SCIENCE ASSOCIATES, LLC, LOS ALAMOS NATIONAL SECURITY, LLC
    Inventors: David R. Douglas, Stephen Benson, Dinh Cong Nguyen, Christopher Tennant, Guy Wilson
  • Patent number: 9041318
    Abstract: A cyclotron that accelerates an ion using a magnetic field includes a hollow yoke and an ion source that is provided in the yoke and generates an ion. The ion source includes a conductive cylindrical body and a filament disposed in the cylindrical body. A current is supplied from a power supply to the filament, and a direction of the current supplied to the filament is changed.
    Type: Grant
    Filed: September 4, 2013
    Date of Patent: May 26, 2015
    Assignee: SUMITOMO HEAVY INDUSTRIES, LTD.
    Inventors: Takuya Miyashita, Kazutomo Matsumura
  • Patent number: 8994297
    Abstract: A low-voltage, multi-beam radio frequency source that operates at a voltage less than or equal to approximately 20-40 kV and that generates at least 600 kW at a pulse width of approximately 5-30 ms. The RF source includes an electron gun having a cathode configured to generate a plurality of beamlets. An input cavity and output cavity are common to the plurality of beamlets. A plurality of gain cavities are provided between the input and output cavities, each having a plurality of openings corresponding to the plurality of beamlets. The cathode may include 10-20 beamlet cathodes formed in a ring, each being configured to generate a single beamlet and each having beamlet optics independent of each other. A beam collector having a plurality of openings corresponding to each of the beamlets may be provided within the output section, where the openings have no RF coupling to each other.
    Type: Grant
    Filed: August 31, 2012
    Date of Patent: March 31, 2015
    Assignee: Omega P Inc.
    Inventor: Vladimir Teryaev
  • Publication number: 20150084548
    Abstract: A circular accelerator of the present invention includes an electrode that applies a high frequency electric field for accelerating a charged particle beam, an electromagnetic device that bends the charged particle beam, and a direct current (or DC) power supply device that applies a direct current (or DC) electric field to the previous described electrode.
    Type: Application
    Filed: August 12, 2014
    Publication date: March 26, 2015
    Inventors: Shigemitsu HARA, Fumiaki NODA, Takamichi AOKI
  • Patent number: 8970137
    Abstract: A synchrocyclotron includes magnetic structures to provide a magnetic field to a cavity, a particle source to provide a plasma column to the cavity, where the particle source has a housing to hold the plasma column, and where the housing is interrupted at an acceleration region to expose the plasma column, and a voltage source to provide a radio frequency (RF) voltage to the cavity to accelerate particles from the plasma column at the acceleration region.
    Type: Grant
    Filed: November 8, 2013
    Date of Patent: March 3, 2015
    Assignee: Mevion Medical Systems, Inc.
    Inventors: Kenneth P. Gall, Gerrit Townsend Zwart
  • Publication number: 20150038764
    Abstract: A charged particle beam transport system is characterized in that in a fixed transport unit, a phase of a phase space distribution of a charged particle beam at an inlet of a rotating deflection unit that rotates around an gantry rotation axle of a rotating gantry coincides with a phase determined by a calculation based on an average value of a first phase advance and a second phase advance. The first phase advance is defined as a change in a phase, of the phase space distribution, that changes when the charged particle beam travels from the inlet of the rotating deflection unit to an isocenter in the case where a gantry angle is a gantry reference angle; the second phase advance is defined as a change in a phase at a time when the gantry angle is pivoted by 90° from the gantry reference angle.
    Type: Application
    Filed: May 24, 2012
    Publication date: February 5, 2015
    Applicant: Mitsubishi Electric Corporation
    Inventors: Kengo Sugahara, Shuhei Odawara, Katsuhisa Yoshida
  • Patent number: 8947184
    Abstract: The present disclosure relates to a cyclotron. Embodiments of the present disclosure may include an upper and lower magnet pole, an upper and lower superconducting coil arranged around each of the magnetic poles, a ring-shaped magnetic return yoke, a beam chamber between the upper and lower magnetic poles having one or more electrodes configured to accelerate ions moving substantially in the median plane, and a cryostat. The ring-shaped magnetic return yoke and the coils may form a cold mass contained within the cryostat. Further, the cryostat may not contain the upper and lower poles.
    Type: Grant
    Filed: March 27, 2014
    Date of Patent: February 3, 2015
    Assignee: Ion Beam Applications, S.A.
    Inventors: Yves Jongen, Eric Forton
  • Patent number: 8947021
    Abstract: An accelerator includes an inflector through which a beam entering from an ion source passes and which introduces the beam to an acceleration orbit. The inflector includes a beam convergence unit that converges the beam passing through the inflector. A cyclotron, which accelerates a beam in a convoluted acceleration orbit, includes magnetic poles, D-electrodes, and an inflector. The magnetic poles generate a magnetic field in a direction perpendicular to the acceleration orbit. The D-electrodes generate a potential difference, which accelerates the beam, in the acceleration orbit. A beam, which enters in an incident direction perpendicular to the acceleration orbit, passes through the inflector, and the inflector bends the beam so as to introduce the beam to the acceleration orbit. The inflector includes a beam convergence unit that converges the beam passing through the inflector.
    Type: Grant
    Filed: May 23, 2011
    Date of Patent: February 3, 2015
    Assignee: Sumitomo Heavy Industries, Ltd.
    Inventor: Hiroshi Tsutsui
  • Patent number: 8933651
    Abstract: The invention comprises a flattened magnet coil system that reduces space between a first magnet turning section and a second magnet turning section in a synchrotron accelerator, which reduces or eliminates need for one or more quadrupole focusing elements in the accelerator. Optionally, a coil, in the flattened magnetic coil system, is wrapped about a central metal member between yoke members of a magnet. The coil has a first width and a first thickness along the length of the magnet and a second width and a second thickness along the end of the magnet where the first width is larger than the second width and the second thickness is larger than the first thickness allowing a smaller distance between the first magnet turning section and the second magnet turning section while maintaining current flow in the coil.
    Type: Grant
    Filed: November 16, 2012
    Date of Patent: January 13, 2015
    Inventors: Vladimir Balakin, Yury Valyaev
  • Patent number: 8907309
    Abstract: The invention relates to a method and apparatus for control of a charged particle cancer therapy system. A treatment delivery control system is used to directly control multiple subsystems of the cancer therapy system without direct communication between selected subsystems, which enhances safety, simplifies quality assurance and quality control, and facilitates programming. For example, the treatment delivery control system directly controls one or more of: an imaging system, a positioning system, an injection system, a radio-frequency quadrupole system, a ring accelerator or synchrotron, an extraction system, a beam line, an irradiation nozzle, a gantry, a display system, a targeting system, and a verification system. Generally, the control system integrates subsystems and/or integrates output of one or more of the above described cancer therapy system elements with inputs of one or more of the above described cancer therapy system elements.
    Type: Grant
    Filed: March 7, 2013
    Date of Patent: December 9, 2014
    Inventor: Stephen L. Spotts
  • Patent number: 8901845
    Abstract: A lighting apparatus may include a plurality of light emitting devices, a temperature sensor, and a compensation circuit. The plurality of light emitting devices may include a first light emitting device configured to emit light having a first chromaticity, a second light emitting device configured to emit light having a second chromaticity different than the first chromaticity, and a third light emitting device configured to emit light having the second chromaticity. Moreover, the first, second, and third light emitting devices may be electrically coupled in series. The temperature sensor may be configured to generate a temperature sense signal responsive to heat generated by at least one of the plurality of light emitting devices.
    Type: Grant
    Filed: May 4, 2011
    Date of Patent: December 2, 2014
    Assignee: Cree, Inc.
    Inventors: Paul K. Pickard, Joseph P. Chobot, Mark D. Edmond
  • Patent number: 8884256
    Abstract: A septum magnet includes a yoke that can be separated at the approximately center portion thereof in the axis direction; a septum coil; a return coil; and a vacuum duct that is inserted between the septum coil and the return coil. The septum coil is formed in such a way as to be able to be separated into a first portion and a second portion in response to separation of the yoke; and in a space between the septum coil and the vacuum duct, there is provided an auxiliary coil, in two portions of which, corresponding to the first portion and the second portion of the septum coil, electric currents flow in opposite direction to each other in a circumferential direction.
    Type: Grant
    Filed: February 13, 2012
    Date of Patent: November 11, 2014
    Assignee: Mitsubishi Electric Corporation
    Inventors: Kengo Sugahara, Katsuhisa Yoshida, Toshihiro Otani, Shinichi Masuno, Fumihiko Kashima
  • Patent number: 8878464
    Abstract: A laser accelerator driven electronic brachytherapy system, device, and method for particle based treatment of a tumor or other human diseases and conditions.
    Type: Grant
    Filed: September 30, 2011
    Date of Patent: November 4, 2014
    Assignees: Varian Medical Systems Inc., The Regents of the University of California
    Inventors: James E. Clayton, Paul A. Lovoi, Wim Leemans
  • Patent number: 8872446
    Abstract: A welding method of welding a cylindrical stiffening member to an outer circumference of a superconducting accelerator tube body uses a laser beam in a process of manufacturing a superconducting accelerator tube. The laser beam is configured such that a distribution profile of energy density on an irradiated face to which the laser beam is irradiated is a Gaussian distribution profile having a peak section, and the energy density of the peak section is 5.8×105 W/cm2 or more.
    Type: Grant
    Filed: February 10, 2011
    Date of Patent: October 28, 2014
    Assignee: Mitsubishi Heavy Industries, Ltd.
    Inventors: Shuho Tsubota, Katsuya Sennyu, Fumiaki Inoue
  • Patent number: 8841867
    Abstract: A crossed field device, such as a magnetron or crossed field amplifier, that includes a cathode, an anode, one or more magnetic elements, and one or more extraction elements. In one embodiment, the crossed field device includes an annular cathode and anode that are axially spaced from one another such that the device produces an axial electric (E) field and a radial magnetic (B) field. In another embodiment, the crossed field device includes an oval-shaped cathode and anode that are radially spaced from one another such that the device produces a radial electric (E) field and an axial magnetic (B) field. The crossed field device may produce electromagnetic (EM) emissions having a frequency ranging from megahertz (MHz) to terahertz (THz), and may be used in one of a number of different applications.
    Type: Grant
    Filed: August 20, 2010
    Date of Patent: September 23, 2014
    Assignee: The Regents of The University of Michigan
    Inventors: Ronald M. Gilgenbach, Yue-Ying Lau, David M. French, Brad W. Hoff, John Luginsland, Matthew Franzi
  • Patent number: 8836250
    Abstract: Provided herein are systems and methods for operating a traveling wave linear accelerator to generate stable electron beams at two or more different intensities by varying the number of electrons injected into the accelerator structure during each pulse by varying the electron beam current applied to an electron gun. The electron beams may be used to generate x-rays having selected doses and energies, which may be used for cargo scanning or radiotherapy applications.
    Type: Grant
    Filed: May 16, 2012
    Date of Patent: September 16, 2014
    Assignee: Accuray Incorporated
    Inventors: Stephen Wah-Kwan Cheung, Roger Heering Miller, Juwen Wang
  • Patent number: 8836248
    Abstract: An apparatus to monitor a condition of a solid state charge device (SSCD) useful in electrostatic printing includes a power supply and a frequency detector. The power supply provides current to the SSCD, and includes a resonant controller. The frequency detector senses a frequency associated with the current, and since the frequency is representative of the condition of the SSCD, the frequency detector thereby monitors the condition of the SSCD. A method of monitoring the condition of the SSCD includes providing current to the SSCD using a power supply, and sensing a frequency associated with the current. The power supply includes a resonant controller, and the frequency is representative of the condition of the SSCD, and thus the method thereby monitors the condition of the SSCD. A corresponding computer-readable medium is also disclosed.
    Type: Grant
    Filed: November 28, 2012
    Date of Patent: September 16, 2014
    Assignee: Xerox Corporation
    Inventor: Hendrikus Adrianus Anthonius Verheijen
  • Patent number: 8836249
    Abstract: A method is described wherein a beam of charged particles is confined to an orbit within a compact region of space as it is accelerated across a wide range of energies. This confinement is achieved using a non-scaling magnetic field based on the Fixed Alternating Gradient principle where the field strength includes non-linear components. Examples of magnet configurations designed using this method are disclosed.
    Type: Grant
    Filed: February 25, 2011
    Date of Patent: September 16, 2014
    Assignee: Passport Systems, Inc.
    Inventors: William Bertozzi, Wilbur Franklin, Carol Johnstone, Robert J. Ledoux
  • Patent number: 8836247
    Abstract: A drift-tube linear accelerator that passes an injected particle beam through inside a plurality of cylindrical drift-tube electrodes arranged in a cylindrical cavity in a particle beam traveling direction and accelerates the particle beam by a radio-frequency electric field generated between the plurality of cylindrical drift-tube electrodes, wherein at least part of a focusing device for focusing the particle beam is disposed inside an end drift-tube electrode that is arranged nearest the injection side of the cylindrical cavity among the plurality of cylindrical drift-tube electrodes, with the focusing device being positionally adjustable independently of the end drift-tube electrode.
    Type: Grant
    Filed: June 14, 2011
    Date of Patent: September 16, 2014
    Assignee: Mitsubishi Electric Corporation
    Inventors: Kazuo Yamamoto, Hirofumi Tanaka, Hiromitsu Inoue, Sadahiro Kawasaki
  • Patent number: 8823291
    Abstract: The present invention relates to a dual-frequency resonant cavity (6) for cyclotron which includes a dee (10), a pillar (20), and a conducting enclosure (40) surrounding the pillar and the dee, an end of the pillar being connected to the base of the conducting enclosure and an opposite end of the pillar (20) supporting the dee (10). The conducting enclosure and the pillar form a transmission line comprising at least three portions (20a, 20b, 20c), each portion having a characteristic impedance (Zc1, Zc2, Zc3). The characteristic impedance Zc2 of the intermediate portion (20b) is substantially lower than the characteristic impedances Zc1 et Zc3 of the two other portions (20a, 20b), which makes it possible to have the cavity resonate according to two modes in order to produce two distinct frequencies, without having to make use of moving components such as for example sliding short-circuits or mobile plates.
    Type: Grant
    Filed: June 28, 2011
    Date of Patent: September 2, 2014
    Assignee: Ion Beam Applications, S.A.
    Inventor: Michel Abs
  • Patent number: 8803453
    Abstract: A method for generating stabilized particle acceleration by a radio-frequency (RF) accelerator is described, comprising operating the accelerator in a warm-up mode during a warm-up time period, without injecting charged particles or without accelerating injected charged particles, and operating the accelerator in a beam-on mode during a beam-on time period after the warm-up time period, to accelerate charged particles injected by the charged particle source. Automatic frequency control to match an expected frequency of the accelerator during the beam-on time period, prior to the start of the beam-on time period, for stability, is also described.
    Type: Grant
    Filed: June 22, 2011
    Date of Patent: August 12, 2014
    Assignee: Varian Medical Systems, Inc.
    Inventors: Douglas W. Eaton, Gongyin Chen, Timothy R. Fox
  • Patent number: 8796614
    Abstract: Provided is an apparatus for generating a proton beam, which includes a laser system providing a laser pulse, a target generating a proton beam by using the laser pulse, and a phase conversion plate disposed between the laser system as a light source and the target to convert the laser pulse into a circularly polarized laser pulse having a spiral shape.
    Type: Grant
    Filed: May 6, 2013
    Date of Patent: August 5, 2014
    Assignee: Electronics and Telecommunications Research Institute
    Inventors: Dong Hoon Song, Dong-Ho Shin, Hwang Woon Lee, Hyung Ju Park, Moon Youn Jung
  • Patent number: 8791656
    Abstract: An example particle accelerator includes a magnet to generate a magnetic field, where the magnet includes first superconducting coils to pass current in a first direction to thereby generate the first magnetic field, and where the first magnetic field is at least 4 Tesla (T). The example particle accelerator also includes an active return system including second superconducting coils. Each of the second superconducting coils surrounds, and is concentric with, a corresponding first superconducting coil. The second superconducting coils are for passing current in a second direction that is opposite to the first direction to thereby generate a second magnetic field having a magnetic field of at least 2.5 T. The second magnetic field has a polarity that is opposite to a polarity of the first magnetic field.
    Type: Grant
    Filed: May 31, 2013
    Date of Patent: July 29, 2014
    Assignee: Mevion Medical Systems, Inc.
    Inventors: Gerrit Townsend Zwart, James Cooley
  • Patent number: 8771480
    Abstract: Biomass (e.g., plant biomass, animal biomass, and municipal waste biomass) is processed to produce useful products, such as fuels. For example, systems can use feedstock materials, such as cellulosic and/or lignocellulosic materials and/or starchy materials, to produce ethanol and/or butanol, e.g., by fermentation.
    Type: Grant
    Filed: June 20, 2013
    Date of Patent: July 8, 2014
    Assignee: Xyleco, Inc.
    Inventor: Marshall Medoff
  • Patent number: 8760086
    Abstract: An accelerator for accelerating two beams of charged particles and for producing a collision of the beams includes: an apparatus for producing an electrostatic potential field such that the two beams are acceleratable or deceleratable by the electrostatic field, a reaction zone for collision of the charged particles; first and second acceleration distances for the first and second beams, each acceleration distance directed towards the reaction zone, wherein the reaction zone is arranged geometrically with respect to the potential field and to the acceleration distances such that the particles of the beams are acceleratable towards the reaction zone along the first and second acceleration distances and, after interaction in the reaction zone and passage through the reaction zone, are deceleratable in the potential field, such that energy used by the potential field apparatus for accelerating the beams towards the reaction zone can be at least partially recovered by the deceleration.
    Type: Grant
    Filed: April 5, 2011
    Date of Patent: June 24, 2014
    Assignee: Siemens Aktiengesellschaft
    Inventor: Oliver Heid
  • Patent number: 8754596
    Abstract: A DC high voltage source may include a capacitor stack having a first electrode that can be brought to a first potential, a second electrode arranged concentrically with the first electrode and which can be brought to a second potential different from the first potential, at least one intermediate electrode arranged concentrically between the first and second electrodes and which can be brought to an intermediate potential between the first and second potentials, a switching device for charging the capacitor stack, to which switching device the electrodes of the capacitor stack are connected and which is configured such that upon operation of the switching device the electrodes of the capacitor stack arranged concentrically with respect to each other can be brought to increasing potential levels, wherein the switching device comprises electron tubes, e.g., controllable electron tubes. A particle accelerator comprising such a DC high voltage source is also provided.
    Type: Grant
    Filed: February 2, 2011
    Date of Patent: June 17, 2014
    Assignee: Siemens Aktiengesellschaft
    Inventor: Oliver Heid
  • Patent number: 8747624
    Abstract: Biomass (e.g., plant biomass, animal biomass, and municipal waste biomass) is processed to produce useful products, such as fuels. For example, systems can use feedstock materials, such as cellulosic and/or lignocellulosic materials and/or starchy materials, to produce ethanol and/or butanol, e.g., by fermentation.
    Type: Grant
    Filed: June 20, 2013
    Date of Patent: June 10, 2014
    Assignee: Xyleco, Inc.
    Inventor: Marshall Medoff
  • Publication number: 20140152197
    Abstract: A method of operating an acceleration system comprises injecting charged particles into an RF accelerator, providing RF power to the accelerator, and accelerating the injected charged particles. The accelerated charged particles may impact a target to generate radiation. The RF power is based, at least in part, on past performance of the system, to compensate, at least partially, for dose and/or energy instability. A controller may provide a compensated control voltage (“CCV”) to an electric power source based on the past performance, to provide compensated electric power to the RF source. A decreasing CCV, such as an exponentially decreasing CCV, may be provided to the electric power source during beam on time periods. The CCV to be provided may be increased, such as exponentially increased toward a maximum value, during beam off time periods. The controller may be configured by a compensation circuit and/or software. Systems are also described.
    Type: Application
    Filed: December 3, 2012
    Publication date: June 5, 2014
    Applicant: Varian Medical Systems, Inc.
    Inventors: Gongyin CHEN, Kenneth Todd Romriell, David Alan Howell
  • Patent number: 8723451
    Abstract: An accelerator for charged particle may include: a capacitor stack which includes a first electrode that can be brought to a first potential, a second electrode that is concentric to the first electrode and can be brought to a second potential differing from the first potential, and at least one intermediate electrode that is concentrically arranged between the first electrode and the second electrode and can be brought to an intermediate potential lying between the first potential and the second potential; a switching device to which the electrodes of the capacitor stack are connected and which is designed such that the concentric electrodes of the capacitor stack can be brought to increasing potential stages during operation of the switching device; a first and a second acceleration channel formed by first and second openings in the electrodes of the capacitor stack such that charged particles can be accelerated along the first and second acceleration channel by means of the electrodes; and a device which c
    Type: Grant
    Filed: February 2, 2011
    Date of Patent: May 13, 2014
    Assignee: Siemens Aktiengesellschaft
    Inventor: Oliver Heid
  • Patent number: 8716958
    Abstract: A microwave device for accelerating electrons includes an electron gun providing an electron beam along an axis in a microwave structure for accelerating the electrons of the beam, an input for the electron beam, an output for accelerated electrons, and a series of coupled cavities along said axis, of central resonant frequency, an input for a microwave signal for excitation of the microwave structure by one of the cavities, a radiofrequency generator providing the excitation microwave signal to the acceleration microwave structure, and a central unit controlling the variation of energy of the electrons at the output of the microwave structure. The radiofrequency generator comprises a frequency control input for changing the frequency of the excitation microwave signal around the central resonant frequency, the change producing a variation of the energy of the accelerated electrons of the beam at the output of the microwave structure.
    Type: Grant
    Filed: August 19, 2010
    Date of Patent: May 6, 2014
    Assignee: Thales
    Inventor: Serge Sierra
  • Patent number: 8680792
    Abstract: An accelerator assembly includes a first chip and a second chip. An acceleration channel is formed into a surface of a first side of the first chip. The first side of the first chip is covalently bonded to a first side of the second chip such that the channel is a tubular void between the first and second chips. The channel has a tubular inside sidewall surface, substantially no portion of which is a metal surface. The channel has length-to-width ratio greater than five, and a channel width less than one micron. There are many substantially identical channels that extend in parallel between the first and second chips. In one specific example, the assembly is part of a Direct Write On Wafer (DWOW) printing system. The DWOW printing system is useful in semiconductor processing in that it can direct write an image onto a 300 mm diameter wafer in one minute.
    Type: Grant
    Filed: August 7, 2013
    Date of Patent: March 25, 2014
    Assignee: Transmute, Inc.
    Inventors: Kim L. Hailey, Robert O. Conn
  • Publication number: 20140077729
    Abstract: An RF generator has a hollow conductor having a conductive wall. The wall has a first slot, over which a first solid-state switch is arranged in order to apply a radiofrequency electrical voltage through the first slot.
    Type: Application
    Filed: October 13, 2011
    Publication date: March 20, 2014
    Applicant: SIEMENS AKTIENGESELLSCHAFT
    Inventors: Oliver Heid, Timothy Hughes
  • Patent number: 8674630
    Abstract: An on-axis rf power coupler for a superconducting particle accelerator includes a coaxial coupler tube that passes through a rf waveguide stub connected to a rf power source. The coupler tube is movable in translation along the axis of the beam path by a piezoelectric drive to permit variation of the coupling between the rf power source and the resonant signal in the accelerator. A tubular rf window extending through the waveguide stub, together with a vacuum bellows assembly connected to the coupler tube, isolate the vacuum inside the accelerator cavity from the vacuum in the rf waveguide and stub. A choke joint in the wall of the waveguide selectively passes unwanted HOM signals out of the waveguide stub and away from the accelerator cavity, where they are dissipated by ferrite tiles on the coupler tube. The upstream end of the coupler tube and a tubular extension of the accelerator cavity form a coaxial line for introducing rf power into the accelerator.
    Type: Grant
    Filed: October 27, 2012
    Date of Patent: March 18, 2014
    Inventor: Wayne Douglas Cornelius
  • Patent number: 8653762
    Abstract: A particle accelerator including an electrical field system and a magnetic field system that are configured to direct charged particles along a desired path within an acceleration chamber. The particle accelerator also includes a mechanical device that is located within the acceleration chamber. The mechanical device is configured to be selectively moved to different positions within the acceleration chamber. The particle accelerator also includes an electromechanical (EM) motor having a connector component and piezoelectric elements that are operatively coupled to the connector component. The connector component is operatively attached to the mechanical device. The EM motor drives the connector component when the piezoelectric elements are activated thereby moving the mechanical device.
    Type: Grant
    Filed: December 23, 2010
    Date of Patent: February 18, 2014
    Assignee: General Electric Company
    Inventors: Tomas Eriksson, Bert Holmgren
  • Patent number: 8643313
    Abstract: An actuator assembly for use within the vacuum field of a cyclotron, one embodiment of which comprises an interactor which is moveable between a first position and a second position, at least one support structure for supporting the interactor in the first and second positions, a shape memory alloy (SMA) element connected to the interactor and/or support structure and being adapted to exert a force on the interactor and/or support structure so as to urge the interactor from the first position to the second position, an electromagnetic activator operatively associated with the SMA element for causing the element to exert the force when the electromagnetic activator is selectably activated, and a return mechanism operatively connected to the interactor, the support structure and/or the SMA element so as to urge the interactor from the second position to the first position when the electromagnetic activator is deactivated.
    Type: Grant
    Filed: December 29, 2011
    Date of Patent: February 4, 2014
    Assignee: General Electric Company
    Inventor: Johan Larsson
  • Patent number: 8643314
    Abstract: A particle accelerator that is a synchrocyclotron accelerating charged particles and which includes an acceleration electrode that accelerates the charged particles; a high frequency power source that supplies the electric power to the acceleration electrode; a control unit that adjusts the frequency of the electric power supplied from the high frequency power source based on energy of the charged particle which is accelerated; and a matching circuit that has a coil and a capacitor, and performing impedance matching between the acceleration electrode and the high frequency power source, wherein the matching circuit has an inductance adjustment unit electrically adjusting the inductance of the coil.
    Type: Grant
    Filed: May 9, 2012
    Date of Patent: February 4, 2014
    Assignee: Sumitomo Heavy Industries, Ltd.
    Inventor: Yutaka Touchi
  • Patent number: 8637818
    Abstract: The invention comprises a charged particle beam acceleration, extraction, and/or targeting method and apparatus used in conjunction with charged particle beam radiation therapy of cancerous tumors. Novel design features of a synchrotron are described. Particularly, turning magnets, edge focusing magnets, concentrating magnetic field magnets, winding and control coils, flat surface incident magnetic field surfaces, and extraction elements are described that minimize the overall size of the synchrotron, provide a tightly controlled proton beam, directly reduce the size of required magnetic fields, directly reduces required operating power, and allow continual acceleration of protons in a synchrotron even during a process of extracting protons from the synchrotron.
    Type: Grant
    Filed: April 26, 2012
    Date of Patent: January 28, 2014
    Inventor: Vladimir Balakin
  • Patent number: 8629633
    Abstract: A DC high voltage source may include: (a) a capacitor stack having a first electrode which can be brought to a first potential, a second electrode concentric with the first electrode and which can be brought to a second potential different from the first potential, and a plurality of intermediate electrodes concentric with respect to each other and concentrically between the first and second electrodes and which can be brought to a sequence of increasing potential levels between the first and second potentials, and (b) a switching device to which the electrodes of the capacitor stack are connected and which is configured such that, during operation of the switching device, the electrodes of the capacitor stack can be brought to the increasing potential levels, wherein the distance of the electrodes of the capacitor stack decreases toward the central electrode. An accelerator comprising such a DC high voltage source is also provided.
    Type: Grant
    Filed: February 2, 2011
    Date of Patent: January 14, 2014
    Assignee: Siemens Aktiengesellschaft
    Inventors: Oliver Heid, Timothy Hughes
  • Patent number: 8624528
    Abstract: The invention relates generally to treatment of solid cancers. More particularly, the invention relates to enhancing synchrotron acceleration cycle usage efficiency by adjusting the synchrotron's acceleration cycle to correlate with a patient's respiration rate where efficiency refers to the duty cycle or the percentage of acceleration cycles used to deliver charged particles to the tumor. The system senses patient respiration and controls timing of negative ion beam formation, injection of charged particles into a synchrotron, acceleration of the charged particles, and extraction to yield delivery of the particles to the tumor at a predetermine period of the patient's respiration cycle. Independent control of charged particle energy and intensity is maintained during the timed irradiation therapy. Multi-field irradiation ensures efficient delivery of Bragg peak energy to the tumor while spreading ingress energy about the tumor.
    Type: Grant
    Filed: February 17, 2010
    Date of Patent: January 7, 2014
    Inventor: Vladimir Balakin
  • Patent number: 8614554
    Abstract: The invention comprises a charged particle beam acceleration, extraction, and/or targeting method and apparatus used in conjunction with charged particle beam radiation therapy of cancerous tumors. Novel design features of a synchrotron are described. Particularly, turning magnets, edge focusing magnets, concentrating magnetic field magnets, winding and control coils, flat surface incident magnetic field surfaces, and extraction elements are described that minimize the overall size of the synchrotron, provide a tightly controlled proton beam, directly reduce the size of required magnetic fields, directly reduces required operating power, and allow continual acceleration of protons in a synchrotron even during a process of extracting protons from the synchrotron.
    Type: Grant
    Filed: April 14, 2012
    Date of Patent: December 24, 2013
    Inventor: Vladimir Balakin
  • Patent number: 8610380
    Abstract: An accelerator pack, specifically for linear accelerator modules cascade-connected to a proton-emitting cyclotron, specially adapted for use in cancer therapies. Such a technique is named PT. The pack displays an accelerating cavity of improved efficiency in virtue of its shape, which provides for making a portion of accelerating cavity on both faces of the pack. Furthermore, the pack also contains a coupling cavity portion. In such a manner, the volume of the accelerating cavity is increased as compared to that of the packs of the known accelerator modules.
    Type: Grant
    Filed: July 18, 2008
    Date of Patent: December 17, 2013
    Inventor: Vittorio Giorgio Vaccaro
  • Publication number: 20130307437
    Abstract: The Energy Density Intensifier for Accelerating, Compressing and Trapping Charged Particles in a Solenoid Magnetic Field is a method and apparatus operable upon a population of charged particles possessing an initial angular momentum (magnetic moment) within a vacuum mirror solenoid magnetic field. An electric field is applied generally along the longitudinal magnetic field axis accelerating, compressing and trapping the charged particles by their magnetic moment against the radial component of the field gradient of the mirror magnetic field of the solenoid magnetic field, by means of the electric force established by the electric field.
    Type: Application
    Filed: May 17, 2012
    Publication date: November 21, 2013
    Inventor: Mark Edward Morehouse
  • Patent number: 8581525
    Abstract: A plurality of magnetic extraction bumps are incorporated into a cyclotron that further includes (a) a pair of magnetic coils encircling a central axis and positioned on opposite sides of a median acceleration plane and (b) a magnetic yoke encircling the central axis and including a return yoke that crosses the median acceleration plane and a first and second pole on opposite sides of the median acceleration plane. The magnetic extraction bumps extend in series radially from the central axis on opposite sides of the median acceleration plane and can be used to extract an orbiting accelerated ion from the cyclotron.
    Type: Grant
    Filed: March 23, 2012
    Date of Patent: November 12, 2013
    Assignee: Massachusetts Institute of Technology
    Inventors: Timothy A. Antaya, Jun Feng, Alexey Radovinsky, Stanislaw P. Sobczynski
  • Patent number: 8581523
    Abstract: A synchrocyclotron includes magnetic structures to provide a magnetic field to a cavity, a particle source to provide a plasma column to the cavity, where the particle source has a housing to hold the plasma column, and where the housing is interrupted at an acceleration region to expose the plasma column, and a voltage source to provide a radio frequency (RF) voltage to the cavity to accelerate particles from the plasma column at the acceleration region.
    Type: Grant
    Filed: November 30, 2007
    Date of Patent: November 12, 2013
    Assignee: Mevion Medical Systems, Inc.
    Inventors: Kenneth Gall, Gerrit Townsend Zwart
  • Patent number: 8575563
    Abstract: A gantry for administering proton beam therapy with improvements which reduce the size, weight, costs and radiation beam loss associated with proton beam therapy systems currently commercially available. The gantry utilizes achromatic superconducting multi-function electromagnet systems wherein the magnets can include dipoles and quadrupoles. The achromatic properties of the rampable magnet systems allow for ease of transmission of the beam whose energy is rapidly changed through a large range of different energies without changing of the strength of the magnetic fields or dipole settings. The magnets may be made with either low or high temperature superconductors. The gantry design further integrates beam scanning but keeps the gantry isocentric. A much greater fraction of the beam can be transmitted through the gantry than with current art, thereby reducing radiation shielding requirements and the demand put on the accelerator to produce large quantities of proton beam.
    Type: Grant
    Filed: November 2, 2010
    Date of Patent: November 5, 2013
    Assignee: ProCure Treatment Centers, Inc.
    Inventors: John M. Cameron, Vladimir Anferov, Timothy A. Antaya
  • Patent number: 8575867
    Abstract: A charged particle accelerator having a curvilinear beam trajectory maintained solely by a laterally directed, constant electric field; requiring no magnetic field. A method for controlling the trajectory of a charged particle in an accelerator by applying only a constant electric field for beam trajectory control. Curvilinear steering electrodes held at a constant potential create the beam path. A method for making a chip-scale charged particle accelerator involves integrated circuit-based processes and materials. A particle accelerator that can generate 110 KeV may a footprint less than about 1 cm2.
    Type: Grant
    Filed: December 3, 2009
    Date of Patent: November 5, 2013
    Assignee: Cornell University
    Inventors: Amit Lal, Shi Yue