| 序号 | 专利名 | 申请号 | 申请日 | 公开（公告）号 | 公开（公告）日 | 发明人 |
|---|---|---|---|---|---|---|
| 101 | Reducing dark current in a standing wave linear accelerator | US09865375 | 2001-05-25 | US06366641B1 | 2002-04-02 | Kenneth Whitham |
| Systems and methods for reducing dark current levels in a standing wave linear accelerator without sacrificing operating performance are described. In a radiation mode, the standing wave linear accelerator is operated to produce a pulsed therapeutic photon beam having a characteristic pulse width. In an electron mode, the standing wave linear accelerator is operated to produce a pulsed therapeutic electron beam having a characteristic pulse width that is shorter than the characteristic pulse width of the therapeutic photon beam. In some embodiments, assuming a uniform dark current level, the dark current level may be reduced in proportion with the beam pulse width reduction in the electron mode of operation. A system for implementing this therapeutic beam generation method also is described. | ||||||
| 102 | Method and apparatus for varying accelerator beam output energy | US640640 | 1996-05-01 | US5821694A | 1998-10-13 | Lloyd M. Young |
| A coupled cavity accelerator (CCA) accelerates a charged particle beam with rf energy from a rf source. An input accelerating cavity receives the charged particle beam and an output accelerating cavity outputs the charged particle beam at an increased energy. Intermediate accelerating cavities connect the input and the output accelerating cavities to accelerate the charged particle beam. A plurality of tunable coupling cavities are arranged so that each one of the tunable coupling cavities respectively connect an adjacent pair of the input, output, and intermediate accelerating cavities to transfer the rf energy along the accelerating cavities. An output tunable coupling cavity can be detuned to variably change the phase of the rf energy reflected from the output coupling cavity so that regions of the accelerator can be selectively turned off when one of the intermediate tunable coupling cavities is also detuned. | ||||||
| 103 | Linear accelerator with improved input cavity structure and including tapered drift tubes | US846498 | 1992-02-25 | US5381072A | 1995-01-10 | Eiji Tanabe |
| A standing wave type of microwave linear particle accelerator (40) has a sequence of microwave cavities (42), (43), (44), operated in the standing wave mode, with drift tube conduits (31), (32), (33), between them to permit the passage of a beam of charged particles which are accelerated by the electric fields in each cavity. The first cavity (42) into which the particles enter has a conduit (30) comprising a drift region connected to the particle entrance port (2), outlined by a re-entrant nose (3) extending into the first cavity (42). The drift tube conduit (31) between the first and second cavities (42, 43) has a tapered interior, and the diameter at the upstream end is less than the diameter of the conduit (30) in the re-entrant nose (3) of the first cavity (42). This structure significantly reduces the back bombardment of particles moving backward through the port (2), and increases the efficiency of particle focusing and bunching in the first cavity (42 ). | ||||||
| 104 | Plane wave transformer linac structure | US361942 | 1989-06-06 | US5014014A | 1991-05-07 | Donald A. Swenson |
| A plane wave transformer linear accelerator structure for accelerating charged particles to velocities greater than one-half the speed of light. The accelerator includes a tank section having a generally cylindrical tank wall. End plates each containing a central aperture for accommodating the passage of a charged particle beam are positioned adjacent to the ends of the tank wall. Support rods extend between the end plates, partially defining at least one axially-extending outer cavity and at least one axially-extending inner cavity. A plurality of axially-spaced washers situated substantially on the central axis of the tank section are supported by the rods. The washers each have central apertures which together define a charged particle beam acceleration path through the tank section. | ||||||
| 105 | Small-diameter standing-wave linear accelerator structure | US157086 | 1988-02-08 | US4988919A | 1991-01-29 | Eiji Tanabe; Matthew Bayer; Mark E. Trail |
| A compact, small diameter, standing-wave linear accelerator structure suitable for industrial and medical applications is disclosed. The novel structure utilizes a new type of coupling cavity for Pi/2 mode, standing-wave operation. The coupling cavity fits into the webs between the accelerating cavities substantially within the diameter of the acclerating cavities. This is made possible by keeping the center section of the cavity thin to concentrate the electric field vector at the center of a section of the cavity and by enlarging the ends of a section of the coupling cavity to accommodate the magnetic field vector. This structure offers a significant reduction in overall diameter over the side-coupled, annular ring, and existing coaxial coupled structures, while maintaining a high shunt impedance and large nearest neighbor coupling (high group velocity). A prototype 4 MeV, 36 cm long, S-band accelerator incorporating the new structure has been built and tested. | ||||||
| 106 | Array electron accelerator | US196424 | 1988-05-20 | US4893058A | 1990-01-09 | Jean-Pierre Gueguen; Annick N'Guyen; Jacques Pottier |
| A coaxial cavity (CC) resonating in accordance with the fundamental mode and the electrons are injected into the median plane perpendicular to the axis. Application to the irradiation of various strip-like substances. | ||||||
| 107 | Linear charged particle accelerator | US495812 | 1983-05-18 | US4596946A | 1986-06-24 | Jacques Pottier |
| A linear charged particle accelerator incorporating drift tubes is disclosed. The linear charged particle accelerator is of the type comprising, within a conductive envelope, drift tubes defining between them acceleration gaps of lengths such that in two successive gaps the longitudinal component of the electrical field has an identical modulus having in each gap, a supplementary drift tube arranged substantially in the center of the gap between two adjacent tubes and electrically connected to the envelope by an impedence, the addition of the supplementary drift tubes making it possible to reduce the diameter of the drift tubes and increase the effective linear shunt impedence of the accelerator structure. | ||||||
| 108 | Intercoupled linear accelerator sections operating in the 2.pi./3 mode | US555045 | 1975-03-03 | US3959687A | 1976-05-25 | Stanley O. Schriber |
| In the 2.pi./3 standing wave mode of energizing resonant cavities, a regular field pattern is set up between adjacent cavities which follows the sequence + (or -), - (or +) and zero. In the novel system of this invention, two series of cavities are used to form accelerating sections wherein the standing wave is propagated successively from one section to the other such that adjacent cavities in each of the sections have positive and negative fields and the resonant coupling cells between the sections have zero fields. This system is used in the acceleration of two beams by a single driving source or in a double track race-track microtron. | ||||||
| 109 | Multiperiodic accelerator structures for linear particle accelerators | US37658473 | 1973-07-05 | US3906300A | 1975-09-16 | TRAN DUC TIEN |
| High efficiency linear accelerator structures comprising a succession of cylindrical resonant cavities which are accelerating cavities, and coupling annular cavities which are located at the periphery thereof, each of these annular cavities being coupled to two adjacent cylindrical cavities.
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| 110 | Method for the acceleration of ions in linear accelerators and a linear accelerator for the realization of this method | US3710163D | 1971-02-02 | US3710163A | 1973-01-09 | RUDIAK B; PIPA A; BOMKO V; REVUTSKY E |
| The present invention relates to methods for acceleration of ions in linear accelerator and to a linear accelerator realizing this method. The method for the acceleration of ions in linear accelerators consisting of a cavity resonator 1 and drift tubes 2 employing a standing r.f. electromagnetic wave, according to the invention, is characterized in that the resonator is excited in the E011 mode enabling the energy of the accelerated-ion beam to be controlled continuously by establishing a region with a uniform distrubution of the accelerating field and by varying the extent of that tregion. This method can be realized by a linear accelerator comprising a cavity resonator 1 with drift tubes 2; tuners 3 arranged on the side wall of the resonator 1; an additional tuning means made in the form of a conducting post 4 installed in an end wall of the resonator 1 near its side wall parallel with the axis of the resonator and capable of being moved along that axis.
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| 111 | Multi-periodic accelerating structure | US3530332D | 1969-05-20 | US3530332A | 1970-09-22 | GIORDANO SALVATORE |
| 112 | Accelerator apparatus and method of shaping cavity fields | US3466554D | 1967-03-10 | US3466554A | 1969-09-09 | GIORDANO SALVATORE T |
| 113 | Structure for linear ion accelerators | US80951459 | 1959-04-28 | US3067359A | 1962-12-04 | JACQUES POTTIER |
| 114 | High-frequency apparatus | US7483749 | 1949-02-05 | US2653271A | 1953-09-22 | WOODYARD JOHN R |
| 115 | Hybrid standing wave linear accelerators providing accelerated charged particles or radiation beams | US15456057 | 2017-03-10 | US10015874B2 | 2018-07-03 | Andrey Mishin |
| A hybrid linear accelerator is disclosed comprising a standing wave linear accelerator section (“SW section”) followed by a travelling wave linear accelerator section (“TW section”). In one example, RF power is provided to the TW section and power not used by the TW section is provided to the SW section via a waveguide. An RF switch, an RF phase adjuster, and/or an RF power adjuster is provided along the waveguide to change the energy and/or phase of the RF power provided to the SW section. In another example, RF power is provided to both the SW section and the TW section, and RF power not used by the TW section is provided to the SW section, via an RF switch, an RF phase adjuster, and/or an RF power. In another example, an RF load is matched to the output of the TW section by an RF switch. | ||||||
| 116 | METHOD FOR OPERATING A LINEAR ACCELERATOR, LINEAR ACCELERATOR, AND MATERIAL-DISCRIMINATING RADIOSCOPY DEVICE | US15813860 | 2017-11-15 | US20180139836A1 | 2018-05-17 | MARTIN KOSCHMIEDER; MARVIN MOELLER; SVEN MUELLER; STEFAN WILLING |
| A linear accelerator is operated by emitting charged particles from a particle source and accelerating the particles in an accelerator by wayof a high-frequency alternating field in such a way that pulses of charged particles are generated. A high-frequency power is periodically supplied by way of high-frequency pulses to the accelerator in order to generate the high-frequency alternating field. A particle stream emitted by the particle source is varied during a HF pulse length of the high-frequency pulse in such a way that the pulse formed during the HF pulse length has at least two sub-pulses with different mean energies per particle. There is also described a linear accelerator that carries out the method and a material-discriminating radioscopy device with a linear accelerator of this kind. | ||||||
| 117 | SYNCHROTRON INJECTOR SYSTEM, AND SYNCHROTRON SYSTEM OPERATION METHOD | US15024737 | 2013-11-26 | US20160249444A1 | 2016-08-25 | Kazuo YAMAMOTO; Sadahiro KAWASAKI; Hiromitsu INOUE |
| A synchrotron injector system comprising a first ion source which generates a first ion, a second ion source which generates a second ion having a smaller charge-to-mass ratio than a charge-to-mass ratio of the first ion, a pre-accelerator having the capability to enable to accelerate both the first ion and the second ion, a low-energy beam transport line which is constituted in such a way to inject either the first ion or the second ion into the pre-accelerator, and a self-focusing type post-accelerator which accelerates only the first ion after acceleration which is emitted from the pre-accelerator. | ||||||
| 118 | Interleaving multi-energy x-ray energy operation of a standing wave linear accelerator | US13610594 | 2012-09-11 | US09031200B2 | 2015-05-12 | Ching-Hung Ho; Stephen Wah-Kwan Cheung; Roger Heering Miller; Juwen Wang |
| The disclosure relates to systems and methods for interleaving operation of a standing wave linear accelerator (LINAC) for use in providing electrons of at least two different energy ranges, which can be contacted with x-ray targets to generate x-rays of at least two different energy ranges. The LINAC can be operated to output electrons at different energies by varying the power of the electromagnetic wave input to the LINAC, or by using a detunable side cavity which includes an activatable window. | ||||||
| 119 | Interleaving multi-energy X-ray energy operation of a standing wave linear accelerator using electronic switches | US13525940 | 2012-06-18 | US08786217B2 | 2014-07-22 | Ching-Hung Ho; Stephen Wah-Kwan Cheung; Roger Heering Miller; Juwen Wang |
| The disclosure relates to systems and methods for fast-switching operating of a standing wave linear accelerator (LINAC) for use in generating x-rays of at least two different energy ranges with advantageously low heating of electronic switches. In certain embodiments, the heating of electronic switches during a fast-switching operation of the LINAC can be kept advantageously low through the controlled, timed activation of multiple electronic switches located in respective side cavities of the standing wave LINAC, or through the use of a modified a side cavity that includes an electronic switch. | ||||||
| 120 | Accelerator pack, specifically for linear acceleration modules | US12988370 | 2008-07-18 | US08610380B2 | 2013-12-17 | Vittorio Giorgio Vaccaro |
| 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. | ||||||
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