| 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 | ACCELERATING STRUCTURE | US14024865 | 2013-09-12 | US20140125254A1 | 2014-05-08 | Daisuke SUZUKI; Sadao MIURA |
| 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. | ||||||
| 162 | Microwave device for accelerating electrons | US13391380 | 2010-08-19 | US08716958B2 | 2014-05-06 | Serge Sierra |
| 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. | ||||||
| 163 | Microwave Device for Accelerating Electrons | US13391380 | 2010-08-19 | US20120200238A1 | 2012-08-09 | Serge Sierra |
| 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. | ||||||
| 164 | Method for accelerating electrons in a linear accelerator and an accelerating structure for carrying out said method | US12451434 | 2005-12-12 | US08148923B2 | 2012-04-03 | Andrei Sergeevich Alimov; Boris Sarkisovich Ishkhanov; Nikolai Ivanovich Pakhomov; Viktor Petrovich Sakharov; Vasily Ivanovich Shvedunov |
| Low-injection energy electrons are accelerated in a continuous standing wave linear accelerator. Electron flow is supplied directly from a low-energy electron source to subsequent sequential accelerating units interconnected via connection cells. By grouping electrons in the first bunch resonator at a determined gap voltage, increasing the electron energy in a booster resonator and accelerating the electron energy in the accelerating unit, the optimal phase of particles with respect to the electromagnetic field is ensured. The length of each accelerating structure segment, which is located between centers of the adjacent cells, is based on the equality between the relation of the length of each following segment to the length of the previous segment and the relation of the average electron speed in the previous segment to the average electron speed in the following segment. | ||||||
| 165 | Charged particle accelerators, radiation sources, systems, and methods | US12287792 | 2008-10-14 | US08111025B2 | 2012-02-07 | David Whittum; James E. Clayton; George Merdinian |
| Man-portable radiation generation sources and systems that may be carried by hand to a site of interest by one or two people, are disclosed. Methods of use of such sources and systems are also disclosed. Battery operated radiation generation sources, air cooled radiation generation sources, and charged particle accelerators, are also disclosed. A radiation generation source with a target less than 0.20 mm is also disclosed. | ||||||
| 166 | Interleaving Multi-Energy X-Ray Energy Operation Of A Standing Wave Linear Accelerator | US12718901 | 2010-03-05 | US20110216886A1 | 2011-09-08 | 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. | ||||||
| 167 | ACCELERATOR PACK, SPECIFICALLY FOR LINEAR ACCELERATION MODULES | US12988370 | 2008-07-18 | US20110089871A1 | 2011-04-21 | 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. | ||||||
| 168 | Slot resonance coupled standing wave linear particle accelerator | US12152883 | 2008-06-04 | US07898193B2 | 2011-03-01 | Roger H. Miller; Nikolai Barov |
| A slot resonance coupled, linear standing wave particle accelerator. The accelerator includes a series of resonant accelerator cavities positioned along a beam line, which are connected by resonant azimuthal slots formed in interior walls separating adjacent cavities. At least some of the slots are resonant at a frequency comparable to the resonant frequency of the cavities. The resonant slots are offset from the axis of the accelerator and have a major dimension extending in a direction transverse to the radial direction with respect to the accelerator axis. The off-axis resonant slots function to magnetically couple adjacent cavities of the accelerator while also advancing the phase difference between the standing wave in adjacent cavities by 180 degrees in addition to the 180 degree phase difference resulting from coupling of the standing wave in each cavity with the adjacent slot, such that the signals in each cavity are in phase with one another and each cavity functions as a live accelerating cavity. The resonance frequency of the slot is the comparable to the resonance frequency of the cavities, resulting in coupling of the cavities while also eliminating the need for side-cavity or other off-axis coupling cavities. | ||||||
| 169 | INTERLEAVING MULTI-ENERGY X-RAY ENERGY OPERATION OF A STANDING WAVE LINEAR ACCELERATOR USING ELECTRONIC SWITCHES | US12499644 | 2009-07-08 | US20110006708A1 | 2011-01-13 | 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. | ||||||
| 170 | METHOD FOR ACCELERATING ELECTRONS IN A LINEAR ACCELERATOR AND AN ACCELERATING STRUCTURE FOR CARRYING OUT SAID METHOD | US12451434 | 2005-12-12 | US20100207553A1 | 2010-08-19 | Andrei Sergeevich Alimov; Boris Sarkisovich Ishkhanov; Nikolai Ivanovich Pakhomov; Viktor Petrovich Sakharov; Vasily Ivanovich Shvedunov |
| The invention relates to a method for accelerating low-injection energy electrons in a continuous standing wave linear accelerator (9) consisting in successively grouping electrons, in accelerating said electrons in a high-frequency electromagnetic field, which is formed in accelerating units (2, 3, 4i) and in which the electron flow is supplied directly from a low-energy electron source (10) to said subsequently accelerating cells (2, 3, 4i) interconnected via connection cells (5, 6i), in grouping electrons with the aid of the first accelerating unit embodied in the form of a bunch resonator (2) at a determined voltage Ug on the gap thereof, in increasing the electron energy in the second accelerating unit embodied in the form of a booster resonator (3) in such a way that the relative speed thereof $g(b) is $m(G) 0.4-0.5, wherein the optimal bunching thereof is carried out according to the electron flow speed at the bunch resonator (2) input and to the high-frequency electromagnetic field wavelength, and in accelerating the electron energy in the accelerating unit (4i) following-up the second unit to a required quantity, wherein the optimal phase of particles with respect to the electromagnetic field is ensured, at least in the accelerating units in which non-relativistic electrons whose kinetic energy is less than a rest energy equal to 0.511 MeV are supplied, by selecting the length (L1, Li) of the accelerating structure segment, which is located between the centres (E2, E3, E41, E4I) of the adjacent connection cells and comprises said accelerating unit, wherein said selection is based on the equality between the relation of the length (Li) of each following segment to the length (LI−1) of the previous segment and the relation of the average electron speed in the previous segment to the average electron speed in the following segment. | ||||||
| 171 | STANDING WAVE ELECTRON LINEAR ACCELERATOR AND INSTALLATION ADJUSTING DEVICE THEREOF | US11997442 | 2006-12-25 | US20100002843A1 | 2010-01-07 | Yaohong Liu; Chuanxiang Tang; Yuanjing Li; Jinsheng Liu; Wei Jia; Jianjun Gao; Huaping Tang; Chong Gu; Wei Yin; Dan Zhang; Qinghui Zhang |
| The present invention discloses a standing wave linear accelerator, comprising: a microwave device configured to generate microwave; an electron beam emitting device configured to emit electron beam; an accelerating device configured to receive the microwave generated by the microwave device and form a microwave electric field, to accelerate electron beams generated from the electron beam emitting device and undertake the accelerated electron beam targeting to emit X ray beam; a synchronous device generating synchronous pulse signal; and a quick beam emitting device receiving the synchronous pulse signal generated by the synchronous device, wherein the microwave device runs and generates microwave in advance before the operation of the electron beam emitting device based on the synchronous pulse signal, and the quick beam emitting device drives the electron beam emitting device to emit electron beam after power of the microwave generated by the microwave device reaches stable state, so that the accelerating device emits X ray beam. In the accelerator, the microwave system and the electron beam emitting device do not work at the same time, and the accelerator electron beam emitting system is started only when the AFC is put into operation and runs stably. | ||||||
| 172 | Standing wave particle beam accelerator having a plurality of power inputs | US11212471 | 2005-08-25 | US07400094B2 | 2008-07-15 | Gard E. Meddaugh |
| A device for generating a particle beam includes a particle source, and a structure having a first section and a second section, the first section coupled to the particle source, the first section having a first power input, and the second section having a second power input, wherein the first section is configured to produce a particle beam having a first energy E1, and the second section is configured to increase or decrease the first energy E1 by an amount E2, the absolute value of E2 being less than E1. | ||||||
| 173 | Standing wave particle beam accelerator | US10957212 | 2004-10-01 | US07400093B2 | 2008-07-15 | Arthur Salop; David H. Whittum; Michael A. Kauffman; Mark E. Trail; Gard E. Meddaugh |
| A method for generating an electron beam includes prescribing a location, and generating an envelope of electrons, the envelope having a waist, wherein the generating is performed such that the waist of the envelope is at or adjacent to the prescribed location. A device for generating an electron beam includes a gun source for generating electrons, and a plurality of electromagnetic cavities coupled in series to form a body, the electromagnetic cavities configured to accelerate at least some of the electrons to create a beam of electrons at an energy level having a value between 5 MeV and 20 MeV, the beam of electrons having a cross sectional dimension that is 0.02 λ (or 2 mm) or less. | ||||||
| 174 | Linear accelerator | US11194886 | 2005-08-01 | US07157868B2 | 2007-01-02 | Kevin John Brown; Terry Arthur Large; Wei Yu |
| A linear accelerator comprises a series of accelerating cavities, adjacent pairs of which are coupled via coupling cavities, in which at least one coupling cavity comprises a rotationally asymmetric element that is rotateable thereby to vary the coupling offered by that cavity. A control means for the accelerator is also provided, adapted to control operation of the accelerator and rotation of the asymmetric element, arranged to operate the accelerator in a pulsed manner and to rotate the asymmetric element between pulses to control the energy of successive pulses. A beneficial way of doing so is to rotate the asymmetric element continuously during operation of the linear accelerator. Then, the control means need only adjust the phase of successive pulses so that during the brief period of the pulse, the asymmetric element is “seen” to be at the required position. The asymmetric element can disposed within an evacuated part of the accelerator and rotated by way of an electromagnetic interaction with parts outside the evacuated part. No parts associated with the drive need therefore pass through the vacuum seal. This could be achieved by providing at least one magnetically polarized member on the asymmetric element and at least one electrical coil outside the evacuated part. | ||||||
| 175 | Linear accelerator | US11194886 | 2005-08-01 | US20060202644A1 | 2006-09-14 | Kevin Brown; Terry Large; Wei Yu |
| A linear accelerator comprises a series of accelerating cavities, adjacent pairs of which are coupled via coupling cavities, in which at least one coupling cavity comprises a rotationally asymmetric element that is rotateable thereby to vary the coupling offered by that cavity. A control means for the accelerator is also provided, adapted to control operation of the accelerator and rotation of the asymmetric element, arranged to operate the accelerator in a pulsed manner and to rotate the asymmetric element between pulses to control the energy of successive pulses. A beneficial way of doing so is to rotate the asymmetric element continuously during operation of the linear accelerator. Then, the control means need only adjust the phase of successive pulses so that during the brief period of the pulse, the asymmetric element is “seen” to be at the required position. The asymmetric element can disposed within an evacuated part of the accelerator and rotated by way of an electromagnetic interaction with parts outside the evacuated part. No parts associated with the drive need therefore pass through the vacuum seal. This could be achieved by providing at least one magnetically polarised member on the asymmetric element and at least one electrical coil outside the evacuated part. | ||||||
| 176 | Ion acceleration system for hadrontherapy | US11232929 | 2005-09-23 | US20060170381A1 | 2006-08-03 | Ugo Amaldi; Massimo Crescenti; Riccardo Zennaro |
| A system for ion acceleration for medical purposes includes a conventional or superconducting cyclotron, a radiofrequency linear accelerator (Linac), a Medium Energy Beam Transport line (MEBT) connected, at the low energy side, to the exit of the cyclotron, and at the other side, to the entrance of the linear radiofrequency accelerator, as well as a High Energy Beam Transport line (HEBT) connected at high energy side to the radiofrequency linear accelerator exit and at the other end, to a system for the dose distribution to the patient. The high operation frequency of the Linac allows for reduced consumption and a remarkable compactness facilitating its installation in hospital structures. The use of a modular LINAC allows varying in active way the energy and the current of the therapeutic beam, having a small emittance and a time structure adapted to the dose distribution based on the technique known as the “spot scanning”. | ||||||
| 177 | X-ray source employing a compact electron beam accelerator | US10407101 | 2003-04-03 | US06864633B2 | 2005-03-08 | Mark E. Trail; David H. Whittum; Gard E. Meddaugh |
| A standing wave electron beam accelerator and x-ray source is described. The accelerator has a plurality of on-axis resonant cells having axial apertures electrically coupled to one another by on-axis coupling cells having axial apertures. The accelerator includes a buncher cavity defined in part by an apertured anode and a half cell. The buncher cavity is configured to receive electrons injected through said anode aperture and r.f. focus them into a beam which is projected along the axis through said apertures. An x-ray target is supported in spaced relationship to said accelerator by a support having a smaller diameter than the accelerator. | ||||||
| 178 | Linear accelerator | US10049352 | 2002-02-05 | US06710557B1 | 2004-03-23 | John Allen; Leonard Knowles Brundle; Terry Arthur Large; Terence Bates |
| An accelerator comprises a plurality of accelerating cells arranged to convey a beam, adjacent cells being linked by a coupling cell, the coupling cells being arranged to dictate the ratio of electric field in the respective adjacent accelerating cells, at least one coupling cell being switchable between a positive ratio and a negative ratio. Such an accelerator in effect inserts a phase change into the E field by imposing a negative ratio, meaning that the beam will meet a reversed electric field in subsequent cells and will in fact be decelerated. As a result, the beam can be developed and bunched in early cells while accelerating to and/or at relativistic energies, and then bled of energy in later cells to bring the beam energy down to (say) between 100 and 300 KeV. Energies of this magnitude are comparable to diagnostic X-rays, where much higher contrast of bony structures exists. Hence the accelerator can be used to take kilovoltage portal images. | ||||||
| 179 | Standing wave linear accelerator with integral prebunching section | US09866275 | 2001-05-25 | US06465957B1 | 2002-10-15 | Kenneth Whitham; Chong-Guo Yao |
| A standing wave linear accelerator with a prebunching section and an accelerating section that are formed into a unitary accelerating structure is described. The prebunching section is configured to group charged particles into bunches by velocity modulation of the charged particle beam. The accelerating section has a plurality of inter-coupled resonant cavities, including an input cavity that is coupled to the prebunching section and an output cavity. | ||||||
| 180 | Multi-mode operation of a standing wave linear accelerator | US09800214 | 2001-03-05 | US20020122531A1 | 2002-09-05 | Kenneth Whitham |
| The invention provides a scheme in accordance with which a linear accelerator may be operated in two or more resonance (or standing wave) modes to produce charged particle beams over a wide range of output energies so that diagnostic imaging and therapeutic treatment may be performed on a patient using the same device. In this way, the patient may be diagnosed and treated, and the results of the treatment may be verified and documented, without moving the patient. This feature reduces alignment problems that otherwise might arise from movement of the patient between diagnostic and therapeutic exposure machines. In addition, this feature reduces the overall treatment time, thereby reducing patient discomfort. | ||||||
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