| 序号 | 专利名 | 申请号 | 申请日 | 公开（公告）号 | 公开（公告）日 | 发明人 |
|---|---|---|---|---|---|---|
| 161 | Multiple pass cargo inspection system | US12404913 | 2009-03-16 | US07860213B2 | 2010-12-28 | Alan Akery |
| The present invention is a cargo inspection system, employing a radiation source, capable of scanning vehicles and/or cargo in a wide range of sizes, including conventional imaging areas as well as taller and bulkier enclosures at sufficiently optimal efficacy and overall throughput. In one embodiment, the present invention is a multiple pass inspection method for inspecting vehicles and their cargo, comprising a first pass scan, wherein said first pass scan includes moving a radiation source at a suitable scanning distance, rotating a radiation source at a suitable scanning angle, and moving said radiation source along an object under inspection. | ||||||
| 162 | Microwave system for driving a linear accelerator | US11641224 | 2006-12-19 | US20100231144A1 | 2010-09-16 | Paul H. Leek |
| A microwave system for driving a linear accelerator is provided. The inventive microwave system employs a plurality of magnetrons, at least one pulse generator to energize the magnetrons, means for synchronizing outputs from the magnetrons, and at least one waveguide for transmitting synchronized outputs or power from the magnetrons to a linear accelerator. The linear accelerator that is driven by the inventive microwave system demonstrates increased efficiency and dependability, higher energy and power outputs, as well as, different energy outputs that can take the form of successive pulses that alternate between at least two different energy levels. | ||||||
| 163 | Radiotherapy system for performing radiotherapy with presice irradiation | US11987808 | 2007-12-04 | US07619374B2 | 2009-11-17 | Tatsufumi Aoi; Kuniyuki Kajinishi; Ichiro Yamashita; Shinji Nomura; Yoshio Sugimoto; Susumu Urano |
| A radiotherapy system includes: a waveguide, an adjustable waveguide, and a non-reciprocal circuit element. The waveguide transmits a high-frequency wave from a high-frequency power source to an acceleration tube. The adjustable waveguide is included in said waveguide and transforms a part of said waveguide. The non-reciprocal circuit element is provided between said acceleration tube and said adjustable waveguide in said waveguide. Said acceleration tube accelerates charged particles for generating therapeutic radiation by using said high-frequency wave. | ||||||
| 164 | Pulse-to-Pulse-Switchable Multiple-Energy Linear Accelerators Based on Fast RF Power Switching | US12057991 | 2008-03-28 | US20080211431A1 | 2008-09-04 | Andrey V. Mishin; Aleksandr Y. Saverskiy |
| A method and apparatus for modulating at least one of energy and current of an electron beam in a linac for fast switching of particle beam energy on a time scale comparable with, and shorter than, the interval between linac pulses. Such modulation may be achieved by dividing, in a coupler, a radio-frequency (RF) field into field components and coherently adding these components in a phase shifting section to selectively direct the RF field to a chosen section of the linac. The phase shifting section may include at least one arm containing at least one fast switch and at least one phase changer. In specific embodiments, the phase shifting section may include an electronically controlled plasma switch and a plasma short. | ||||||
| 165 | LINEAR ION ACCELERATOR | US11967612 | 2007-12-31 | US20080164421A1 | 2008-07-10 | Hirofumi TANAKA; Kazuo Yamamoto; Hisashi Harada; Hiromitsu Inoue; Takahisa Nagayama; Nobuyuki Zumoto |
| The electrode lengths of a plurality of electrodes linearly arranged in an acceleration cavity are proportional to the velocity of a traveling ion beam. Further, the electrode length is so designated that, in each half of a predetermined cycle in the ion beam direction of travel, the absolute value of a difference, relative to a length that is proportional to the beam traveling velocity is equal to or greater than a value corresponding to the phase width of the traveling ion beam, is provided for electrodes that do not exceed three units and that are fewer than electrodes allotted to half the predetermined cycle. | ||||||
| 166 | System for alternately pulsing energy of accelerated electrons bombarding a conversion target | US11588182 | 2006-10-26 | US20070140422A1 | 2007-06-21 | Vladimir Elyan; Boris Bekhtev; Gary Bowser; Boris Sychev; Vitaly Uvarov |
| A RF linear electron accelerator system for generating a beam of accelerated electrons bunched in pulses having different energy spectra from pulse to pulse. The system is operable to generate a beam of high energy X-rays from such beam of accelerated electrons, using a conversion target, with pulses of the X-ray beam having energy spectra which are different from X-ray pulse to X-ray pulse. Preferably, the pulses of the electron beam have energy spectra which alternate from pulse to pulse and, correspondingly, the pulses of the X-ray beam have energy spectra which alternate from pulse to pulse. Also preferably, the current of electrons injected into the system's accelerating section and the frequency of the pulse RF power supplied to the accelerating section are changed in a synchronized manner to generate the electron beam. The system is employable in an inspection system for discriminating materials present in containers by atomic numbers. | ||||||
| 167 | Cast dielectric composite linear accelerator | US11599797 | 2006-11-14 | US20070138980A1 | 2007-06-21 | David Sanders; Stephen Sampayan; Kirk Slenes; H.M. Stoller |
| A linear accelerator having cast dielectric composite layers integrally formed with conductor electrodes in a solventless fabrication process, with the cast dielectric composite preferably having a nanoparticle filler in an organic polymer such as a thermosetting resin. By incorporating this cast dielectric composite the dielectric constant of critical insulating layers of the transmission lines of the accelerator are increased while simultaneously maintaining high dielectric strengths for the accelerator. | ||||||
| 168 | Multi-section particle accelerator with controlled beam current | US10529277 | 2003-09-29 | US07208890B2 | 2007-04-24 | Alexandre A. Zavadtsev; Gary F. Bowser |
| A particle accelerator system, including apparatuses and methods, that is configurable through repositioning of shorting devices therein to operate at different charged particle beam currents while maintaining optimum transfer of electromagnetic power from electromagnetic waves to one or more accelerating sections thereof, and reducing or eliminating reflections of electromagnetic waves. The particle accelerator system includes at least two accelerating sections and an electromagnetic drive subsystem with portions of the electromagnetic drive subsystem being interposed physically between the accelerating sections, thereby making the particle accelerator system compact. The electromagnetic drive subsystem includes, among other components, a 3 dB waveguide hybrid junction having a coupling window in a narrow wall thereof which is shared by the junction's rectangular-shaped waveguides. By virtue of the coupling window being positioned in a narrow wall rather than a wide wall, the maximal power of the 3 dB waveguide hybrid junction is increased significantly. | ||||||
| 169 | Drift tube accelerator for the acceleration of ion packets | US10889291 | 2004-07-12 | US07081723B2 | 2006-07-25 | Ulrich Ratzinger; Bernhard Schlitt |
| The invention relates to a drift tube accelerator (1) for the acceleration of ion packets in ion beam acceleration systems, wherein a housing (2) consists of a longitudinally divided three-part vacuum tank (3) having a central unit (4) and a lower half-shell (3) comprising a structured lower steel block (15) and an upper half-shell (6) comprising a structured upper steel block (19). (The cavity arranged between the central unit (4) and the structured steel blocks (15, 19) has at least two acceleration regions (24, 25), between which there is arranged a magnetic focussing device (17), which focuses the ion beam from one region (24) to the next region (25).)The drift tube accelerator (1) according to the invention has such a stable and massive structure that it requires no external supporting aids of any kind in order to obtain alignment, which is reliable and accurate to a few micrometers, of the acceleration components within the drift tube accelerator (1) with respect to the longitudinal axis (7) of ion beam guidance of the central unit (4). The massive structure of the drift tube accelerator (1) according to the invention can be used in general for any linear accelerator. | ||||||
| 170 | Sextuplet quadrupole lens system for charged particle accelerators | US10982022 | 2004-11-05 | US07002160B1 | 2006-02-21 | Gary A. Glass; Alexander D. Dymnikov |
| A sextuplet quadruple lens system for focusing charged particles, which lens system is comprised of two symmetrical triplet sets of lens. | ||||||
| 171 | Mobile/transportable PET radioisotope system with omnidirectional self-shielding | US11125029 | 2005-05-08 | US20060017411A1 | 2006-01-26 | Robert Hamm |
| A linear accelerator system for producing PET radioisotopes, and taking the form of a beam-generation-to-target structure which includes form-fitting, self-contained, omnidirectional radiation shielding structure. | ||||||
| 172 | Multi-stage cavity cyclotron resonance accelerator | US09921529 | 2001-07-31 | US06914396B1 | 2005-07-05 | Robert Spencer Symons; Jay L. Hirshfield; Changbiao Wang |
| A high-current, high-gradient, high-efficiency, multi-stage cavity cyclotron resonance accelerator (MCCRA) provides energy gains of over 50 MeV/stage, at an acceleration gradient that exceeds 20 MeV/m, in room temperature cavities. The multi-stage cavity cyclotron resonance accelerator includes a charged particle source, a plurality of end-to-end rotating mode room-temperature cavities, and a solenoid coil. The solenoid coil encompasses the cavities and provides a substantially uniform magnetic field that threads through the cavities. Specifically, the MCCRA is provided with a constant magnetic field sufficient to produce a cyclotron frequency a little higher than the RF of the accelerating electric field. A plurality of input feeds, each of which respectively coupled to a cavity, are also provided. According to an embodiment of the invention, the beam from the first cavity passes through a cutoff drift tube and is accelerated further with a cavity supporting a still lower radio-frequency electric field. This embodiment yields a several-milliampere one-gigavolt proton beam efficiently. The single cavity transfers about 70% of the radio-frequency energy to the beam. A multiple-cavity accelerator using a constant or slightly decreasing static magnetic field along its length and using cutoff drift tubes between the cavities operating at progressively lower frequencies, each somewhat lower than the local relativistic cyclotron frequency of the beam in that cavity, provides an extremely-efficient, compact, continuously-operating, medium-energy accelerator. In another embodiment of the invention, the progressively lower frequencies are selected to decrease in substantially equal increments corresponding to a difference frequency. The charged particles are emitted in pulses in correspondence with the difference frequency. | ||||||
| 173 | Linac for ion beam acceleration | US10602060 | 2003-06-24 | US06888326B2 | 2005-05-03 | Ugo Amaldi; Massimo Crescenti; Riccardo Zennaro |
| A drift tube linear accelerator (linac) that can be used for the acceleration of low energy ion beams. The particles enter the linac at low energy and are accelerated and focused along a straight line in a plurality of resonant accelerating structures interposed by coupling structures up to the desired energy. In the accelerating structures, excited by an H-type resonant electromagnetic field, a plurality of accelerating gaps is provided between drift tubes supported by stems, for instance alternatively horizontally and vertically disposed. A basic module composed of two accelerating structures and an interposed coupling structure, or a modified coupling structure connected to a RF power generator, is if necessary linked to a vacuum system and equipped with one or more quadrupoles. | ||||||
| 174 | Radio frequency focused interdigital linear accelerator | US10834506 | 2004-04-28 | US20040212331A1 | 2004-10-28 | Donald A. Swenson; W. Joel Starling |
| An interdigital (Widernulle) linear accelerator employing drift tubes, and associated support stems that couple to both the longitudinal and support stem electromagnetic fields of the linac, creating rf quadrupole fields along the axis of the linac to provide transverse focusing for the particle beam. Each drift tube comprises two separate electrodes operating at different electrical potentials as determined by cavity rf fields. Each electrode supports two fingers, pointing towards the opposite end of the drift tube, forming a four-finger geometry that produces an rf quadrupole field distribution along its axis. The fundamental periodicity of the structure is equal to one half of the particle wavelength nullnull, where null is the particle velocity in units of the velocity of light and null is the free space wavelength of the rf. Particles are accelerated in the gaps between drift tubes. The particle beam is focused in regions inside the drift tubes. | ||||||
| 175 | Photoelectron linear accelerator for producing a low emittance polarized electron beam | US10261831 | 2002-09-30 | US06744226B2 | 2004-06-01 | David U. L. Yu; James E. Clendenin; Robert E. Kirby |
| A photoelectron linear accelerator for producing a low emittance polarized electric beam. The accelerator includes a tube having an inner wall, the inner tube wall being coated by a getter material. A portable, or demountable, cathode plug is mounted within said tube, the surface of said cathode having a semiconductor material formed thereon. | ||||||
| 176 | Ion accelerator | US10135426 | 2002-05-01 | US06744225B2 | 2004-06-01 | Masahiro Okamura; Takeshi Takeuchi; Toshiyuki Hattori |
| The present invention mainly relates to an ion accelerator with significantly simplified construction, for accelerating an much larger amount of ions, wherein that a plasma-generating target 12, a vacuum chamber 16 for extracting ions from plasma generated from the plasma-generating target 12, and an ion linac 30 are connected in series, the vacuum chamber 16 is installed near an ion entrance of the ion linac 30, the ion accelerator also has a high voltage power supply boosting the vacuum chamber 16 to a desired voltage, and ions are directly injected from the vacuum chamber 16 to the ion linac 30. In addition, so as to improve the above-described ion accelerator 20, to greatly simplifying construction, to efficiently extracting all the ions included in accelerable plasma that is generated, and to be able to accelerate an ion beam with large pulse width, an ion accelerator has the construction that a plasma-generating target 112 for generating plasma by radiating a plasma generating laser L, a vacuum chamber 116 that extracts ions from plasma generated in the plasma-generating target 112 and is directly installed in an ion entrance 138 of an ionic linac 130, and an ion linac 130 are serially connected so that ions may be directly injected into the ion linac 130 by using the diffusion velocity of the plasma. | ||||||
| 177 | Continuous wave electron-beam accelerator and continuous wave electron-beam accelerating method thereof | US09801046 | 2001-03-08 | US06559610B2 | 2003-05-06 | Hirofumi Tanaka |
| A continuous wave electron-beam accelerator that accelerates a continuous wave electron beam having a large average current includes an electron beam generator, an electron-beam accelerating unit using a radio-frequency electric field having a frequency of approximately 500 MHz to accelerate an continuous wave electron beam, and electron-beam bending units located across the electron-beam accelerating unit and that bend the continuous wave electron beam a number of times. Each electron-beam bending unit includes divided magnets having identical-polarity magnetic fields, and controls the continuous wave electron beam so that the beam passes through the electron-beam acceleration unit a number of times on almost the same path. | ||||||
| 178 | Ion accelerator | US10135426 | 2002-05-01 | US20020180365A1 | 2002-12-05 | Masahiro Okamura; Takeshi Takeuchi; Toshiyuki Hattori |
| The present invention mainly relates to an ion accelerator with significantly simplified construction, for accelerating an much larger amount of ions, wherein that a plasma-generating target 12, a vacuum chamber 16 for extracting ions from plasma generated from the plasma-generating target 12, and an ion linac 30 are connected in series, the vacuum chamber 16 is installed near an ion entrance of the ion linac 30, the ion accelerator also has a high voltage power supply boosting the vacuum chamber 16 to a desired voltage, and ions are directly injected from the vacuum chamber 16 to the ion linac 30. In addition, so as to improve the above-described ion accelerator 20, to greatly simplifying construction, to efficiently extracting all the ions included in accelerable plasma that is generated, and to be able to accelerate an ion beam with large pulse width, an ion accelerator has the construction that a plasma-generating target 112 for generating plasma by radiating a plasma generating laser L, a vacuum chamber 116 that extracts ions from plasma generated in the plasma-generating target 112 and is directly installed in an ion entrance 138 of an ionic linac 130, and an ion linac 130 are serially connected so that ions may be directly injected into the ion linac 130 by using the diffusion velocity of the plasma. | ||||||
| 179 | Process for manufacturing hollow fused-silica insulator cylinder | US08889587 | 1997-07-08 | US06331194B1 | 2001-12-18 | Stephen E. Sampayan; Michael L. Krogh; Steven C. Davis; Derek E. Decker; Ben Z. Rosenblum; David M. Sanders; Juan M. Elizondo-Decanini |
| A method for building hollow insulator cylinders that can have each end closed off with a high voltage electrode to contain a vacuum. A series of fused-silica round flat plates are fabricated with a large central hole and equal inside and outside diameters. The thickness of each is related to the electron orbit diameter of electrons that escape the material surface, loop, and return back. Electrons in such electron orbits can support avalanche mechanisms that result in surface flashover. For example, the thickness of each of the fused-silica round flat plates is about 0.5 millimeter. In general, the thinner the better. Metal, such as gold, is deposited onto each top and bottom surface of the fused-silica round flat plates using chemical vapor deposition (CVD). Eutectic metals can also be used with one alloy constituent on the top and the other on the bottom. The CVD, or a separate diffusion step, can be used to defuse the deposited metal deep into each fused-silica round flat plate. The conductive layer may also be applied by ion implantation or gas diffusion into the surface. The resulting structure may then be fused together into an insulator stack. The coated plates are aligned and then stacked, head-to-toe. Such stack is heated and pressed together enough to cause the metal interfaces to fuse, e.g., by welding, brazing or eutectic bonding. Such fusing is preferably complete enough to maintain a vacuum within the inner core of the assembled structure. A hollow cylinder structure results that can be used as a core liner in a dielectric wall accelerator and as a vacuum envelope for a vacuum tube device where the voltage gradients exceed 150 kV/cm. | ||||||
| 180 | High efficiency resonator for linear accelerator | US09602765 | 2000-06-23 | US06326746B1 | 2001-12-04 | Jiong Chen |
| A new radio frequency (rf) linear accelerator (linac) is disclosed in this invention. The rf linac includes a plurality of resonators each includes an inductor circuit L(k), k=1,2,3, . . . , n′ where n′ is a second integer, wherein the inductor circuit connected to at least two electrodes E(j′), j′=1,2,3, . . . (n−1), for applying an accelerating rf voltage thereto. The rf linac further includes a plurality sets of transverse focusing lenses, represented by Lenses(j), where j=1,2,3, . . . n, and n is an integer, for guiding and focusing an ion beam. Each of the electrodes E(j′) disposed between and aligned with two sets of the transverse focusing lenses Lenses(J′) and Lenses(J′+1), j′=1,2,3, . . . (n−1), as a linear array. In a preferred embodiment, at least two of the adjacent electrodes E(j′) and E(j′+1) are connected to a same inductor circuit L(k). In another preferred embodiment, at least two of the adjacent electrodes E(j′) and E(j′+1) are connected to two different inductor circuits L(k1) and L(k2) where k1 and k2 are two different integers and k1 and k2 are smaller than n′. The energy gain from a resonator of this invention is twice or multiple of the energy gain from a single-electrode resonator with the same rf power efficiency. | ||||||
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