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308 results about "Synchrotron" patented technology
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A synchrotron is a particular type of cyclic particle accelerator, descended from the cyclotron, in which the accelerating particle beam travels around a fixed closed-loop path. The magnetic field which bends the particle beam into its closed path increases with time during the accelerating process, being synchronized to the increasing kinetic energy of the particles (see image). The synchrotron is one of the first accelerator concepts to enable the construction of large-scale facilities, since bending, beam focusing and acceleration can be separated into different components. The most powerful modern particle accelerators use versions of the synchrotron design. The largest synchrotron-type accelerator, also the largest particle accelerator in the world, is the 27-kilometre-circumference (17 mi) Large Hadron Collider (LHC) near Geneva, Switzerland, built in 2008 by the European Organization for Nuclear Research (CERN). It can accelerate beams of protons to an energy of 6.5 teraelectronvolts (TeV).
Charged particle beam irradiation system
ActiveUS7875868B2Shorten the timeImprove accuracyThermometer detailsBeam/ray focussing/reflecting arrangementsIon beamSynchrotron
A charged particle beam irradiation system comprises a high-speed steerer (beam dump device) 100 disposed in a course of a beam transport line 4 through which an ion beam is extracted from a charged-particle beam generator 1. The beam dump device 100 is provided with dose monitoring devices 105, 106 for measuring a dose of an ion beam applied to a beam dump 104 so that the intensity of the ion beam can be measured without transporting the ion beam to irradiation nozzles 15A through 15D. Thus, the system is capable of adjusting the intensity of an ion beam extracted from a synchrotron without operating each component of a beam transport line, and an irradiation nozzle.
Owner:HITACHI LTD
Particle beam irradiation system
ActiveUS7807982B2Simplify device configurationEasy to controlLaser detailsParticle separator tubesIntensity controlSynchrotron
It is an object of the present invention to provide a charged particle beam extraction method and particle beam irradiation system that make it possible to exercise intensity control over an extracted ion beam while a simple device configuration is employed. To accomplish the above object, there is provided a particle beam irradiation system comprising: a synchrotron for accelerating and extracting an charged particle beam; an irradiation apparatus for extracting the charged particle beam that is extracted from the synchrotron; first beam intensity modulation means for controlling the beam intensity of the charged particle beam extracted from the synchrotron during an extraction control period of an operation cycle of the synchrotron; and second beam intensity modulation means for controlling the beam intensity during each of a plurality of irradiation periods contained in the extraction control period of the operation cycle.
Owner:HITACHI LTD
Particle beam irradiation system
ActiveUS7301162B2Minimize exposureUniform dose distributionMaterial analysis using wave/particle radiationRadiation/particle handlingParticle beamLight beam
A particle beam irradiation system capable of ensuring a more uniform dose distribution at an irradiation object even when a certain time is required from output of a beam extraction stop signal to the time when extraction of a charged particle beam from an accelerator is actually stopped. The particle beam irradiation system comprises a synchrotron, an irradiation device including scanning magnets and outputting an ion beam extracted from the synchrotron, and a control unit. The control unit stops the output of the ion beam from the irradiation device in accordance with the beam extraction stop signal, controls the scanning magnets to change an exposure position in a state in which the output of the ion beam is stopped, and after the change of the exposure position, starts the output of the ion beam from the irradiation device again. The control unit further outputs a next beam extraction stop signal when an increment of dose integrated from the time of a preceding beam extraction stop signal as a start point reaches a setting dose stored in advance.
Owner:HITACHI LTD
Synchronized x-ray / breathing method and apparatus used in conjunction with a charged particle cancer therapy system
ActiveUS20100128846A1Cathode ray concentrating/focusing/directingMagnetic resonance acceleratorsX-raySynchrotron
The invention comprises an X-ray system that is orientated to provide X-ray images of a patient in the same orientation as viewed by a proton therapy beam, is synchronized with patient respiration, is operable on a patient positioned for proton therapy, and does not interfere with a proton beam treatment path. Preferably, the synchronized system is used in conjunction with a negative ion beam source, synchrotron, and / or targeting method apparatus to provide an X-ray timed with patient respiration and performed immediately prior to and / or concurrently with particle beam therapy irradiation to ensure targeted and controlled delivery of energy relative to a patient position resulting in efficient, precise, and / or accurate noninvasive, in-vivo treatment of a solid cancerous tumor with minimization of damage to surrounding healthy tissue in a patient using the proton beam position verification system.
Owner:BALAKIN ANDREY VLADIMIROVICH +1
RF accelerator method and apparatus used in conjunction with a charged particle cancer therapy system
ActiveUS20100060209A1Stability-of-path spectrometersBeam/ray focussing/reflecting arrangementsLow voltageCharged particle radiotherapy
The invention comprises a radio-frequency accelerator method and apparatus used in conjunction with multi-axis charged particle radiation therapy of cancerous tumors. An RF synthesizer provides a low voltage RF signal, that is synchronized to the period of circulation of protons in the proton beam path, to a set of integrated microcircuits, loops, and coils where the coils circumferentially enclose the proton beam path in a synchrotron. The integrated components combine to provide an accelerating voltage to the protons in the proton beam path in a size compressed and price reduced format. The integrated RF-amplifier microcircuit / accelerating coil system is operable from about 1 MHz, for a low energy proton beam, to about 15 MHz, for a high energy proton beam.
Owner:BALAKIN ANDREY VLADIMIROVICH +1
Charged particle irradiation system and method for controlling the same
ActiveUS20110073778A1Improve performanceEasy to operateChemical conversion by chemical reactionX-ray/gamma-ray/particle-irradiation therapyLight beamSynchrotron
A beam extraction process (interruption and restart) is appropriately performed when a failure occurs during irradiation of a spot group. A charged particle irradiation system includes a synchrotron 12 and a scanning irradiation unit 15 that scans an ion beam extracted from the synchrotron over a subject. The extraction of the ion beam from the synchrotron is stopped on the basis of a beam extraction stop command. Scanning magnets 5A and 5B are controlled to change a point (spot) to be irradiated with the ion beam, while the extraction of the ion beam is stopped. The extraction of the ion beam from the synchrotron is restarted after the change of the spot to be irradiated. When a relatively minor failure in which continuous irradiation would be possible occurs during irradiation of a certain spot with the beam, the extraction of the beam is not immediately stopped.
Owner:HITACHI LTD
Particle beam therapy system
ActiveUS7772577B2Quality improvementLow costElectrode and associated part arrangementsMaterial analysis by optical meansTransport systemSynchrotron
A particle beam therapy system using a spot scanning method includes a synchrotron, a beam transport system, an irradiation system, and a controller. A controller is configured to turn on a radio frequency electromagnetic field to be applied to an extraction system when a charged particle beam is to be supplied to the irradiation system, and turn off the radio frequency electromagnetic field to be applied to the extraction system when the supply of the charged particle beam to the irradiation system is to be blocked by means of an electromagnet provided in the beam transport system or in the synchrotron. The controller is also adapted to turn off a radio frequency acceleration voltage to be applied to an acceleration cavity in synchronization with the turning-off of the radio frequency electromagnetic field to be applied to the extraction device.
Owner:HITACHI LTD
Synchronized X-ray / breathing method and apparatus used in conjunction with a charged particle cancer therapy system
ActiveUS7953205B2Cathode ray concentrating/focusing/directingMagnetic resonance acceleratorsX-rayIn vivo
The invention comprises an X-ray system that is orientated to provide X-ray images of a patient in the same orientation as viewed by a proton therapy beam, is synchronized with patient respiration, is operable on a patient positioned for proton therapy, and does not interfere with a proton beam treatment path. Preferably, the synchronized system is used in conjunction with a negative ion beam source, synchrotron, and / or targeting method apparatus to provide an X-ray timed with patient respiration and performed immediately prior to and / or concurrently with particle beam therapy irradiation to ensure targeted and controlled delivery of energy relative to a patient position resulting in efficient, precise, and / or accurate noninvasive, in-vivo treatment of a solid cancerous tumor with minimization of damage to surrounding healthy tissue in a patient using the proton beam position verification system.
Owner:BALAKIN ANDREY VLADIMIROVICH +1
Charged particle beam extraction system and method
ActiveUS7385203B2Reduce frequencyProcess stabilityThermometer detailsBeam/ray focussing/reflecting arrangementsBragg peakIon beam
A charged particle beam extraction system and method capable of ensuring higher safety when extraction of an ion beam is on / off-controlled during irradiation of the ion beam for treatment. The charged particle beam extraction system comprises a charged particle beam generator including a synchrotron, a range modulation wheel (RMW) for forming a Bragg peak width of a charged particle beam extracted from the charged particle beam generator, a gate signal generator for controlling start and stop of extraction of the charged particle beam from the charged particle beam generator in accordance with a rotational angle of the RMW, and an irradiation control / determination section for determining whether the start and stop of extraction of the charged particle beam is controlled at desired timing by the gate signal generator.
Owner:HITACHI LTD
Particle beam irradiation system
ActiveUS7141810B2Improve usabilityIncreased availability factorRadiation/particle handlingElectrode and associated part arrangementsParticle beamProton
A particle beam irradiation system which can increase an availability factor. An ion beam extracted from one proton beam linac is bent at 90 degrees by a switching magnet and is introduced to RI production equipment through a beam line. In the RI production equipment, a RI is produced using the introduced ion beam. An ion beam extracted from the other proton beam linac is bent at 90 degrees by the switching magnet and is introduced to a synchrotron through a beam line. The ion beam extracted from the synchrotron is irradiated to a patient from irradiation equipment. If one proton beam linac comes into an abnormal state, the one proton beam linac is stopped in operation and checked. During the check, the ion beam extracted from the other proton beam linac is selectively introduced to the RI production equipment and the synchrotron by the switching magnet.
Owner:HITACHI LTD
Negative ion source method and apparatus used in conjunction with a charged particle cancer therapy system
ActiveUS7943913B2Material analysis by optical meansMagnetic resonance acceleratorsTandem acceleratorSynchrotron
The invention comprises a negative ion source method and apparatus used as part of an ion beam injection system, which is used in conjunction with multi-axis charged particle or proton beam radiation therapy of cancerous tumors. The negative ion source preferably includes an inlet port for injection of hydrogen gas into a high temperature plasma chamber. In one embodiment, the plasma chamber includes a magnetic material, which provides a magnetic field barrier between the high temperature plasma chamber and a low temperature plasma region on the opposite side of the magnetic field barrier. An extraction pulse is applied to a negative ion extraction electrode to pull the negative ion beam into a negative ion beam path, which proceeds through a first partial vacuum system, through an ion beam focusing system, into the tandem accelerator, and into a synchrotron.
Owner:BALAKIN ANDREY VLADIMIROVICH +1
Charged particle beam acceleration and extraction method and apparatus used in conjunction with a charged particle cancer therapy system
ActiveUS8089054B2Stability-of-path spectrometersBeam/ray focussing/reflecting arrangementsProtonCombined use
The invention comprises a charged particle beam acceleration and / or extraction 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, 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.
Owner:BALAKIN ANDREY VLADIMIROVICH +1
Particle beam irradiation system
ActiveUS20070228304A1Simplify device configurationEasy to controlLaser detailsHeart defibrillatorsIntensity controlSynchrotron
It is an object of the present invention to provide a charged particle beam extraction method and particle beam irradiation system that make it possible to exercise intensity control over an extracted ion beam while a simple device configuration is employed. To accomplish the above object, there is provided a particle beam irradiation system comprising: a synchrotron for accelerating and extracting an charged particle beam; an irradiation apparatus for extracting the charged particle beam that is extracted from the synchrotron; first beam intensity modulation means for controlling the beam intensity of the charged particle beam extracted from the synchrotron during an extraction control period of an operation cycle of the synchrotron; and second beam intensity modulation means for controlling the beam intensity during each of a plurality of irradiation periods contained in the extraction control period of the operation cycle.
Owner:HITACHI LTD
Particle beam irradiation system
ActiveUS20090283704A1Simplify device configurationEasy to controlLaser detailsRadiation/particle handlingParticle beamIon beam
It is an object of the present invention to provide a charged particle beam extraction method and particle beam irradiation system that make it possible to exercise intensity control over an extracted ion beam while a simple device configuration is employed. To accomplish the above object, there is provided a particle beam irradiation system comprising: a synchrotron for accelerating and extracting an charged particle beam; an irradiation apparatus for extracting the charged particle beam that is extracted from the synchrotron; first beam intensity modulation means for controlling the beam intensity of the charged particle beam extracted from the synchrotron during an extraction control period of an operation cycle of the synchrotron; and second beam intensity modulation means for controlling the beam intensity during each of a plurality of irradiation periods contained in the extraction control period of the operation cycle.
Owner:HITACHI LTD
Method and apparatus for intensity control of a charged particle beam extracted from a synchrotron
ActiveUS20090314961A1Material analysis using wave/particle radiationRadiation/particle handlingAbnormal tissue growthProton
The invention comprises intensity control of a charged particle beam acceleration, extraction, and / or targeting method and apparatus used in conjunction with charged particle beam radiation therapy of cancerous tumors. Particularly, intensity of a charged particle stream of a synchrotron is described. Intensity control is described in combination with turning magnets, edge focusing magnets, concentrating magnetic field magnets, winding and control coils, and extraction elements of the synchrotron. The system reduces the overall size of the synchrotron, provides a tightly controlled proton beam, directly reduces the size of required magnetic fields, directly reduces required operating power, and allows continual acceleration of protons in a synchrotron even during a process of extracting protons from the synchrotron.
Owner:BALAKIN ANDREY VLADIMIROVICH +1
Charged Particle Beam Irradiation System
ActiveUS20090184263A1Shorten the timeImprove accuracyThermometer detailsBeam/ray focussing/reflecting arrangementsBeam dumpLight beam
A charged particle beam irradiation system comprises a high-speed steerer (beam dump device) 100 disposed in a course of a beam transport line 4 through which an ion beam is extracted from a charged-particle beam generator 1. The beam dump device 100 is provided with dose monitoring devices 105, 106 for measuring a dose of an ion beam applied to a beam dump 104 so that the intensity of the ion beam can be measured without transporting the ion beam to irradiation nozzles 15A through 15D. Thus, the system is capable of adjusting the intensity of an ion beam extracted from a synchrotron without operating each component of a beam transport line, and an irradiation nozzle.
Owner:HITACHI LTD
Synchrotron power cycling apparatus and method of use thereof
InactiveUS20110284760A1Stability-of-path spectrometersBeam/ray focussing/reflecting arrangementsInductorSynchrotron
The invention comprises a charged particle cancer therapy system or synchrotron system using one or more switches to introduce a corresponding one or more resistors into a circuit linking a power supply to a magnet or an inductor during an applied power recovery phase between acceleration cycles of the synchrotron, which reduces time of reduction in power from an active applied power to a power suitable for use with a subsequent injection of charged particles into the synchrotron.
Owner:BALAKIN ANDREY VLADIMIROVICH +1
Method and apparatus for intensity control of a charged particle beam extracted from a synchrotron
ActiveUS20120205551A1Stability-of-path spectrometersMaterial analysis by optical meansParticle beamProton
The invention comprises intensity control of a charged particle beam acceleration, extraction, and / or targeting method and apparatus used in conjunction with charged particle beam radiation therapy of cancerous tumors. Particularly, intensity of a charged particle stream of a synchrotron is described. Intensity control is described in combination with turning magnets, edge focusing magnets, concentrating magnetic field magnets, winding and control coils, and extraction elements of the synchrotron. The system reduces the overall size of the synchrotron, provides a tightly controlled proton beam, directly reduces the size of required magnetic fields, directly reduces required operating power, and allows continual acceleration of protons in a synchrotron even during a process of extracting protons from the synchrotron.
Owner:BALAKIN ANDREY VLADIMIROVICH +1
Synchronized x-ray / breathing method and apparatus used in conjunction with a charged particle cancer therapy system
The invention comprises an X-ray system that is orientated to provide X-ray images of a patient in the same orientation as viewed by a proton therapy beam, is synchronized with patient respiration, is operable on a patient positioned for proton therapy, and does not interfere with a proton beam treatment path. Preferably, the synchronized system is used in conjunction with a negative ion beam source, synchrotron, and / or targeting method apparatus to provide an X-ray timed with patient respiration and performed immediately prior to and / or concurrently with particle beam therapy irradiation to ensure targeted and controlled delivery of energy relative to a patient position resulting in efficient, precise, and / or accurate noninvasive, in-vivo treatment of a solid cancerous tumor with minimization of damage to surrounding healthy tissue in a patient using the proton beam position verification system.
Owner:BALAKIN ANDREY VLADIMIROVICH +1
High resolution direct-projection type x-ray microtomography system using synchrotron or laboratory-based x-ray source
ActiveUS7130375B1Large numerical apertureLow efficiencyRadiation beam directing meansX-ray apparatusX-rayMagnification
A projection-based x-ray imaging system combines projection magnification and optical magnification in order to ease constraints on source spot size, while improving imaging system footprint and efficiency. The system enables tomographic imaging of the sample especially in a proximity mode where the same is held in close proximity to the scintillator. In this case, a sample holder is provided that can rotate the sample. Further, a z-axis motion stage is also provided that is used to control distance between the sample and the scintillator.
Owner:CARL ZEISS X RAY MICROSCOPY
Synchronized X-ray / breathing method and apparatus used in conjunction with a charged particle cancer therapy system
Owner:BALAKIN ANDREY VLADIMIROVICH +1
Charged particle beam acceleration and extraction method and apparatus used in conjunction with a charged particle cancer therapy system
ActiveUS20100006770A1Stability-of-path spectrometersDischarge tube luminescnet screensCombined useProton
The invention comprises a charged particle beam acceleration and optional extraction 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, 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.
Owner:BALAKIN ANDREY VLADIMIROVICH +1
Magnetic field control method and apparatus used in conjunction with a charged particle cancer therapy system
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.
Owner:BALAKIN ANDREY VLADIMIROVICH +1
High resolution direct-projection type x-ray microtomography system using synchrotron or laboratory-based x-ray source
ActiveUS7400704B1Large numerical apertureLow efficiencyPatient positioning for diagnosticsRadiation beam directing meansX-rayMagnification
A projection-based x-ray imaging system combines projection magnification and optical magnification in order to ease constraints on source spot size, while improving imaging system footprint and efficiency. The system enables tomographic imaging of the sample especially in a proximity mode where the same is held in close proximity to the scintillator. In this case, a sample holder is provided that can rotate the sample. Further, a z-axis motion stage is also provided that is used to control distance between the sample and the scintillator.
Owner:CARL ZEISS X RAY MICROSCOPY
Method and apparatus coordinating synchrotron acceleration periods with patient respiration periods
ActiveUS8624528B2Increase usageStability-of-path spectrometersBeam/ray focussing/reflecting arrangementsBragg peakMulti field
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.
Owner:BALAKIN ANDREY VLADIMIROVICH +1
Charged particle cancer therapy system magnet control method and apparatus
ActiveUS8373145B2Stability-of-path spectrometersBeam/ray focussing/reflecting arrangementsProtonParticle physics
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, 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.
Owner:BALAKIN ANDREY VLADIMIROVICH +1
Charged particle cancer therapy beam path control method and apparatus
ActiveUS8710462B2Stability-of-path spectrometersBeam/ray focussing/reflecting arrangementsBeam energyNuclear engineering
The invention comprises a charged particle beam path coupling an injector, synchrotron accelerator, beam transport system, targeting system, and / or patient interface method and apparatus. Preferably, the injector comprises: a negative ion beam source, a two phase ion source vacuum system, an ion beam focusing lens, and / or a tandem accelerator. Preferably, the synchrotron comprises turning magnets, edge focusing magnets, magnetic field concentration magnets, winding and correction coils, flat magnetic field incident surfaces, and / or extraction elements. Preferably, the synchrotron, beam transport system, targeting system, and patient interface combine to allow multi-axis / multi-field irradiation, where multi-axis control comprises control of horizontal and vertical beam position, beam energy, and / or beam intensity and multi-field control comprises control of patient rotation and distribution of delivered energy in and about the tumor in a time controlled, targeted, accurate, precise, dosage controlled, and / or efficient manner.
Owner:BALAKIN ANDREY VLADIMIROVICH +1
Charged particle extraction apparatus and method of use thereof
ActiveUS8399866B2Stability-of-path spectrometersBeam/ray focussing/reflecting arrangementsPhysical separationSynchrotron
The invention comprises a charged particle beam extraction method and apparatus optionally used in conjunction with charged particle beam radiation therapy of cancerous tumors. The system uses a radio-frequency (RF) cavity system to induce oscillation of a charged particle stream. Sufficient amplitude modulation of the charged particle stream causes the charged particle stream to hit a material, such as a foil element of a set of foils. The foil decreases the energy of the charged particle stream, which decreases a radius of curvature of the charged particle stream in the synchrotron sufficiently to allow a physical separation of the reduced energy charged particle stream from the original charged particle stream where thickness of a selected foil is a function of energy of circulating charged particles. The physically separated charged particle stream is then removed from the system by use of an applied field and deflector.
Owner:BALAKIN ANDREY VLADIMIROVICH +1
Proton accelerator complex for radio-isotopes and therapy
InactiveUS7554275B2Reduce maintenanceLarge energyMagnetic resonance acceleratorsTransit-time tubesRadio isotopesEngineering
A complex of proton accelerators, includes the following functionally interconnected components: a proton source, a cyclotron, at least one target, located either internally or externally to the cyclotron, a medium energy beam transport magnetic channel, a radiofrequency linear accelerator, a high energy beam transport channel towards an area dedicated to the irradiation of tumors with proton beams, as well as a modular system for supplying radio frequency power capable of feeding, independently two or more accelerating modules of the linac. An integrated computerized system controls the complex of accelerators so to carry out, either in alternation or simultaneously, both the production of radioisotopes—for medical, industrial and therapeutical purposes—and the therapeutical irradiation of, even deep seated tumors. The complex of accelerators produces proton beams which, applying the recently developed ‘spot scanning’ technique, are more suited for the tumor irradiation than the ones produced by cyclotrons and synchrotrons.
Owner:FOND PER ADROTERAPIA ONCOLOGICA TERA
Tandem accelerator method and apparatus used in conjunction with a charged particle cancer therapy system
ActiveUS8198607B2Stability-of-path spectrometersBeam/ray focussing/reflecting arrangementsAbnormal tissue growthHydrogen
The invention comprises a tandem accelerator method and apparatus, which is part of an ion beam injection system used in conjunction with multi-axis charged particle radiation therapy of cancerous tumors. The negative ion beam source includes an injection system vacuum system and a synchrotron vacuum system separated by a foil, where negative ions are converted to positive ions. The foil is sealed to the edges of the vacuum tube providing for a higher partial pressure in the injection system vacuum chamber and a lower pressure in the synchrotron vacuum system. Having the foil physically separating the vacuum chamber into two pressure regions allows for fewer and / or smaller pumps to maintain the lower pressure system in the synchrotron as the inlet hydrogen gas is extracted in a separate contained and isolated space by the injection partial vacuum system.
Owner:BALAKIN ANDREY VLADIMIROVICH +1
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