| 序号 | 专利名 | 申请号 | 申请日 | 公开（公告）号 | 公开（公告）日 | 发明人 |
|---|---|---|---|---|---|---|
| 181 | High gradient, compact, standing wave linear accelerator structure | US09375752 | 1999-08-18 | US06316876B1 | 2001-11-13 | Eiji Tanabe |
| A standing wave accelerator structure that has both inline coupling cavities and side coupling cavities combined into one structure. Additionally, the invention uses a prebunching (re-entrant) cavity, excited electrically or magnetically, through apertures between a first accelerating cavity and the prebunching cavity. | ||||||
| 182 | Hollow-beam microwave linear accelerator | US717859 | 1996-09-23 | US5811943A | 1998-09-22 | Andrey Mishin; Russell G. Schonberg |
| A linear accelerator for charged particles includes a plurality of accelerating stages in a linear arrangement along a central axis. Each accelerating stage has at least one passageway radially spaced from the central axis for transmitting a beam of charged particles. Electromagnetic wave energy is coupled to the accelerating stages to produce an accelerating electric field in a region of the passageway of each of the accelerating stages. Coupling circuits couple the electromagnetic wave energy between adjacent accelerating stages. Each accelerating stage may be configured as an annular accelerating cavity or as two or more accelerating cavities disposed around the central axis. The passageway may be configured as two or more discrete apertures or a single annular aperture. Beam bending devices may be used to direct the charged particle beam through the accelerator two or more times. The linear accelerator produces a high current, high energy charged particle beam. | ||||||
| 183 | Standing-wave accelerating structure with different diameter bores in bunching and regular cavity sections | US196255 | 1988-05-20 | US5039910A | 1991-08-13 | Yusuke Moriguchi; Hiroshi Kikuchi |
| A standing-wave accelerating structure for accelerating charged particles wherein a converging force and a diverging force of an electric field to an electron beam are checked to improve the transmittivity of the electron beam through the accelerating structure and production of X-ray leakage is eliminated or minimized. The accelerating structure comprises a buncher section including at least one cavity for mainly bunching charged particles, and a regular section including at least one cavity. The diameter of a bore in the buncher section is smaller than the diameter of another bore in the regular section. A shorting bar for stopping propagation of microwaves is inserted in at least one of the cavities, and a means for accelerating the charged particles and for converging a beam is provided forwardly or rearwardly of the cavity in which the shorting bar is inserted. | ||||||
| 184 | Microwave electron gun | US385149 | 1989-07-26 | US5029259A | 1991-07-02 | Susumu Nishihara |
| A microwave electron gun for a linear accelerator uses microwave energy to impart an initial acceleration to electrons emitted from a lanthanum-hexaboride cathode. The microwaves are contained in an electron-gun cavity, the upstream wall of which has a protruding part surrounding the entrance opening that accommodates the cathode, and the downstream wall of which has a flat part surrounding an exit opening. The rest of the downstream wall has a radius of curvature equal to that of the other microwave cavities in the accelerating tube, and its center of curvature is aligned with theirs. The cathode is fused to a pair of carbon electrodes to form a cathode block, which is held by clamping between a pair of electrode bars, thus forming a cathode tube. The cathode tube is inserted into a sleeve upstream of the entrance opening in the electron-gun cavity, and is surrounded at a distance of one quarter-wavelength from the cathode by a disk-shaped choke cavity extending one quarter-wavelength from the cathode tube. This electron gun is easy to design and operate, and prevents loss of microwave energy. | ||||||
| 185 | Standing wave linear accelerator having non-resonant side cavity | US717351 | 1985-03-29 | US4629938A | 1986-12-16 | Kenneth Whitham |
| A linear accelerator includes cascaded standing wave main cavities with approximately the same resonant frequency and plural side cavities. A charged particle beam travels longitudinally through the main cavities. An electromagnetic wave excites the cavities with a frequency that is approximately the same as the resonant frequency of the main cavities. There is normally a fixed electromagnetic energy phase shift in adjacent main cavities. The resonant frequency of at least one side cavity is adjusted so it differs from the electromagnetic wave frequency. The detuned side cavity resonant frequency causes: (a) a change in the normal fixed phase shift of the main cavities adjacent the one side cavity and (b) a decrease in electric field strength in cavities electromagnetically downstream of the one side cavity relative to the electric field strength in cavities electromagnetically upstream of the one side cavity. In different embodiments, the electromagnetic wave is injected into a cavity where the particle beam is upstream and downstream of the one side cavity, respectively. | ||||||
| 186 | Accelerating structure for a linear charged particle accelerator | US891057 | 1978-03-28 | US4150322A | 1979-04-17 | Duc Tien Tran; Dominique Tronc |
| An accelerating structure for a linear particle accelerator operating in the progressive wave mode or in the stationary wave mode and comprising at least one accelerating section and a complementary bunching or pre-accelerating section formed by a resonant cavity C of the "reentrant" type magnetically coupled with the first cavity of the accelerating section by means of a coupling iris, the cavity C having a length L=(2m+1).lambda..sub.o/4 and the distance D separating the interaction spaces of the cavity C and the first cavity of the accelerating section being equal to D=(2k+n/2+.alpha.).pi..beta..lambda..sub.o, with O.ltoreq..alpha..ltoreq.1/4, n and k being integers, .beta. being the reduced velocity v/c of the particles and .lambda..sub.o being the operating wave length of the accelerator. | ||||||
| 187 | Standing wave linear accelerator and slotted waveguide hybrid junction input coupler | US777220 | 1977-03-14 | US4146817A | 1979-03-27 | Albert H. McEuen; Victor A. Vaguine |
| A standing-wave linear charged particle accelerator is disclosed which comprises a plurality of interlaced substructures, with each substructure having a plurality of accelerating cavities disposed along the particle beam path and having side cavities disposed away from the beam path for electromagnetically coupling the accelerating cavities. A radio-frequency electromagnetic standing wave is supported in each substructure, with the wave in each substructure being phased with respect to the wave in every other substructure so that the particle beam will experience a maximum energy gain throughout its path through the accelerator. A slotted input coupler is connected to the accelerator to individually drive each of the substructures. | ||||||
| 188 | Standing wave linear accelerator and input coupling | US754650 | 1976-12-27 | US4122373A | 1978-10-24 | Victor A. Vaguine |
| A standing-wave linear charged particle accelerator is disclosed which comprises a plurality of interlaced substructures, with each substructure having a plurality of accelerating cavities disposed along the particle beam path and having side cavities disposed away from the beam path for electromagnetically coupling the accelerating cavities. A standing radio-frequency electromagnetic wave is supported in each substructure, with the wave in each substructure being phased with respect to the wave in every other substructure so that the particle beam will experience a maximum energy gain throughout its path through the accelerator. A single input waveguide is divided into plural branches to individually drive each of the substructures. | ||||||
| 189 | Linear accelerator having a side cavity coupled to two different diameter cavities | US777364 | 1977-03-14 | US4118652A | 1978-10-03 | Victor A. Vaguine |
| In the field of side-cavity coupled accelerators the accelerating cavity to which the accelerating power input is connected has preferably a smaller diameter than the other accelerating cavities. A side cavity is connected by a separate passage to the accelerating cavities of different diameter it couples together, whereby the areas of the coupling irises formed where said passages enter said accelerating cavities can be independently controlled by selecting the length of the respective passage. This separate passage arrangement is particularly described in an accelerator which comprises a plurality of interlaced substructures, with each substructure having a plurality of accelerating cavities disposed along the particle beam path and having side cavities disposed away from the beam path for electromagnetically coupling the accelerating cavities. A standing radio-frequency electromagnetic wave is fed to an accelerating cavity in each substructure so there are plural driven cavities in a single accelerator. Thus, the separate coupling passage arrangement between the side cavity and the accelerating cavities it couples is particularly valuable in said multiple substructure arrangement. | ||||||
| 190 | Standing-wave linear accelerator | US546379 | 1975-02-03 | US4024426A | 1977-05-17 | Victor A. Vaguine |
| A standing-wave linear charged particle accelerator is disclosed which comprises a plurality of interlaced substructures, with each substructure having a plurality of accelerating cavities disposed along the particle beam path and having side cavities disposed away from the beam path for electromagnetically coupling the accelerating cavities. A standing radio-frequency electromagnetic wave is supported in each substructure, with the wave in each substructure being phase with respect to the wave in every other substructure so that the particle beam will experience a maximum energy gain throughout its path through the accelerator. This interlaced substructure configuration minimizes the transit time of the particles across the gap of each accelerating cavity and makes it possible to operate the accelerator without radio-frequency breakdown at a power level that provides a substantially higher average value of the accelerating electric field along the beam path than has heretofore been obtainable. | ||||||
| 191 | Double pass linear accelerator operating in a standing wave mode | US554562 | 1975-03-03 | US4006422A | 1977-02-01 | Stanley O. Schriber |
| A double pass linear accelerator which is used in a radiation therapy unit to provide electron radiation or photon bremsstrahlung radiation when combined with an appropriate target. The accelerator operates in a standing wave mode and includes an accelerating section, a charged particle source and injection section, a microwave source operating in the S band and adapted to excite the accelerating section and a reflector system which is mounted at one end of the accelerating section to reflect a particle beam which has been accelerated due to one pass, back into the accelerating section such that it may be further accelerated. The distance between the reflector is made adjustable to provide for output particle energy variation. | ||||||
| 192 | High energy linear accelerator apparatus | US49912065 | 1965-10-20 | US3403346A | 1968-09-24 | GIORDANO SALVATORE T |
| 193 | Linear accelerator for charged particles | US5320648 | 1948-10-07 | US2556978A | 1951-06-12 | PIERCE JOHN R |
| 194 | Means and method for electron acceleration | US42317341 | 1941-12-16 | US2398162A | 1946-04-09 | SLOAN DAVID H |
| 195 | SYNCHROTRON INJECTOR SYSTEM, AND SYNCHROTRON INJECTOR SYSTEM OPERATION METHOD | EP13898114 | 2013-11-26 | EP3076767A4 | 2017-07-05 | YAMAMOTO KAZUO; KAWASAKI SADAHIRO; INOUE HIROMITSU |
| A synchrotron injector system comprising a first ion source (1) which generates first ions, a second ion source (2) which generates second ions having a smaller charge-to-mass ratio than a charge-to-mass ratio of the first ions, a pre-accelerator (5) having the capability to enable to accelerate both the first ions and the second ions, a low-energy beam transport line (4) which is constituted in such a way to inject either the first ions or the second ions into the pre-accelerator, and a self-focusing type post-accelerator (6) which accelerates only the first ions after acceleration which are emitted from the pre-accelerator (5). | ||||||
| 196 | Standing wave electron linear accelerator with continuously adjustable energy | EP13198316.5 | 2013-12-19 | EP2750486A1 | 2014-07-02 | Tang, Chuanxiang; Zhang, Zhe; Jin, Qingxiu; Shi, Jiaru; Chen, Huaibi; Huang, Wenhui; Zheng, Shuxin; Liu, Yaohong |
A standing wave electron linear accelerating apparatus and a method thereof are disclosed. The apparatus comprises an electron gun configured to generate electron beams; a pulse power source configured to provide a primary pulse power signal; a power divider coupled downstream from the pulse power source and configured to divide the primary pulse power signal outputted from the pulse power source into a first pulse power signal and a second pulse power signal; a first accelerating tube configured to accelerating the electron beams with the first pulse power signal; a second accelerating tube configured to accelerate the electron beams with the second pulse power signal; a phase shifter configured to continuously adjust a phase difference between the first pulse power signal and the second pulse power signal so as to generate accelerated electron beams with continuously adjustable energy at output of the second accelerating tube. |
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| 197 | ACCELERATING STRUCTURE | EP13186319.3 | 2013-09-27 | EP2731409A1 | 2014-05-14 | Suzuki, Daisuke; Miura, Sadao |
The present invention provides an accelerating structure capable of increasing a degree of vacuum at a middle part inside the accelerating structure while confining an alternating electric field to the inside. An accelerating structure 1 is formed of a plurality of annular discs 2 and 3 serially connected into a cylindrical shape. At least one of the discs 3 disposed at a middle part of the accelerating structure 1 includes: a choke structure formed by a choke filter 7; and a vacuum port 8 opened in an outer circumferential surface of the disc further on an outer circumferential side than the choke structure, and the vacuum port 8 is connected to an external exhaust device.
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| 198 | ION ACCELERATION SYSTEM FOR HADRONTHERAPY | EP05809917.7 | 2005-10-28 | EP1847160B1 | 2014-02-19 | AMALDI, Ugo; CRESCENTI, Massimo; ZENNARO, Riccardo |
| 199 | ACCELERATOR PACK, SPECIFICALLY FOR LINEAR ACCELERATION MODULES | EP08789363.2 | 2008-07-18 | EP2283706B1 | 2014-01-01 | Vaccaro, Vittorio Giorgio |
| 200 | INTERLEAVING MULTI-ENERGY X-RAY ENERGY OPERATION OF A STANDING WAVE LINEAR ACCELERATOR USING ELECTRONIC SWITCHES | EP10730681.3 | 2010-07-02 | EP2452545A1 | 2012-05-16 | HO, Ching-Hung; CHEUNG, Stephen, Wah-Kwan; MILLER, Roger, Heering; WANG, Juwen |
| 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. | ||||||
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