Class / Patent application number | Description | Number of patent applications / Date published |
315502000 | Cyclotron | 37 |
20080218102 | Programmable radio frequency waveform generatior for a synchrocyclotron - A synchrocyclotron comprises a resonant circuit that includes electrodes having a gap therebetween across the magnetic field. An oscillating voltage input, having a variable amplitude and frequency determined by a programmable digital waveform generator generates an oscillating electric field across the gap. The synchrocyclotron can include a variable capacitor in circuit with the electrodes to vary the resonant frequency. The synchrocyclotron can further include an injection electrode and an extraction electrode having voltages controlled by the programmable digital waveform generator. The synchrocyclotron can further include a beam monitor. The synchrocyclotron can detect resonant conditions in the resonant circuit by measuring the voltage and or current in the resonant circuit, driven by the input voltage, and adjust the capacitance of the variable capacitor or the frequency of the input voltage to maintain the resonant conditions. The programmable waveform generator can adjust at least one of the oscillating voltage input, the voltage on the injection electrode and the voltage on the extraction electrode according to beam intensity and in response to changes in resonant conditions. | 09-11-2008 |
20080258653 | CYCLOTRON HAVING PERMANENT MAGNETS - An apparatus for an improved cyclotron for producing radioisotopes especially for use in association with medical imaging. The improved cyclotron is configured without a conventional electromagnetic coil. A plurality of dees and a plurality of permanent magnets are alternately disposed in a circular array, each defining a channel through which ions travel. The vacuum chamber wall defines an opening disposed at the center of the array, the opening being configured to receive an ion source. Positive ions flowing from the ion source are exposed to the magnetic field generated by permanent magnets. The positive ions are repelled as they exit a positively charged dee. Negatively charged dees pull the ions. Each time the particles pass through the gap approaching the dees and as they leave the dee and pass through the magnets, they gain energy, so the orbital radius continuously increases and the particles follow an outwardly spiraling path. The disclosure also includes a system composed of a particle accelerator combined with a microreactor or microfluidic chip to produce molecular imaging biomarkers. | 10-23-2008 |
20090140671 | MATCHING A RESONANT FREQUENCY OF A RESONANT CAVITY TO A FREQUENCY OF AN INPUT VOLTAGE - A synchrocyclotron includes magnetic structures that define a resonant cavity, a source to provide particles to the resonant cavity, a voltage source to provide radio frequency (RF) voltage to the resonant cavity, a phase detector to detect a difference in phase between the RF voltage and a resonant frequency of the resonant cavity that changes over time, and a control circuit, responsive to the difference in phase, to control the voltage source so that a frequency of the RF voltage substantially matches the resonant frequency of the resonant cavity. | 06-04-2009 |
20090140672 | Interrupted Particle Source - A synchrocyclotron includes magnetic structures to provide a magnetic field to a cavity, a particle source to provide a plasma column to the cavity, where the particle source has a housing to hold the plasma column, and where the housing is interrupted at an acceleration region to expose the plasma column, and a voltage source to provide a radio frequency (RF) voltage to the cavity to accelerate particles from the plasma column at the acceleration region. | 06-04-2009 |
20100045213 | Programmable Radio Frequency Waveform Generator for a Synchrocyclotron - A synchrocyclotron comprises a resonant circuit that includes electrodes having a gap therebetween across the magnetic field. An oscillating voltage input, having a variable amplitude and frequency determined by a programmable digital waveform generator generates an oscillating electric field across the gap. The synchrocyclotron can include a variable capacitor in circuit with the electrodes to vary the resonant frequency. The synchrocyclotron can further include an injection electrode and an extraction electrode having voltages controlled by the programmable digital waveform generator. The synchrocyclotron can further include a beam monitor. The synchrocyclotron can detect resonant conditions in the resonant circuit by measuring the voltage and or current in the resonant circuit, driven by the input voltage, and adjust the capacitance of the variable capacitor or the frequency of the input voltage to maintain the resonant conditions. The programmable waveform generator can adjust at least one of the oscillating voltage input, the voltage on the injection electrode and the voltage on the extraction electrode according to beam intensity and in response to changes in resonant conditions. | 02-25-2010 |
20110068717 | Twin Internal Ion Source For Particle Beam Production With A Cyclotron - The present invention relates to a cyclotron including two internal ion sources for the production of the same particles. The second ion source can be used as a spare ion source which strongly increases the uptime and the reliability of the cyclotron and reduces the maintenance interventions. Advantageously, the cyclotron is further characterized by an optimized close geometry of the different elements within the central region of the cyclotron. The cyclotron of the invention may be further characterized by an adaptation and optimization of the shape of first and second internal ion source to avoid particle losses during the first turn of acceleration. The cyclotron may be further characterized by an adaptation and optimization of the shape of the counter-Dee electrode assembly and possibly the Dee-electrode assembly in order to improve the acceleration field in-between the gaps. | 03-24-2011 |
20110140641 | Electron Cyclotron Ion Source and Manufacturing Method Thereof - An apparatus of an electron cyclotron resonance ion source may include: a magnet unit containing a magnet for generating magnetic fields; an ionizing chamber housing unit for generating ions through electron cyclotron resonance from a plasma; a microwave generating unit for injecting microwaves to the ionizing chamber housing unit to generate ions; and a beam integrating and guiding unit for treating the generated ions. The magnet unit may include: a bobbin for winding the magnet; a variable spacer for dividing the bobbin into a plurality of sections; and the magnet which is wound into the form of a wire or a tape in the plurality of sections formed by the variable spacer. | 06-16-2011 |
20110285327 | COOLING SYSTEMS AND METHODS - An ion therapy system comprises a particle accelerator ( | 11-24-2011 |
20120126726 | Compact Cold, Weak-Focusing, Superconducting Cyclotron - A compact, cold, weak-focusing superconducting cyclotron can include at least two superconducting coils on opposite sides of a median acceleration plane. A magnetic yoke surrounds the coils and contains an acceleration chamber. The magnetic yoke is in thermal contact with the superconducting coils, and the median acceleration plane extends through the acceleration chamber. A cryogenic refrigerator is thermally coupled both with the superconducting coils and with the magnetic yoke. | 05-24-2012 |
20120161672 | High-Current DC Proton Accelerator - A dc accelerator system able to accelerate high currents of proton beams at high energies is provided. The accelerator system includes a dc high-voltage, high-current power supply, an evacuated ion accelerating tube, a proton ion source, a dipole analyzing magnet and a vacuum pump located in the high-voltage terminal. The high-current, high-energy dc proton beam can be directed to a number of targets depending on the applications such as boron neutron capture therapy BNCT applications, NRA applications, and silicon cleaving. | 06-28-2012 |
20120217903 | CIRCULAR ACCELERATOR AND OPERATING METHOD THEREFOR - The circular accelerator comprises: a bending electromagnet that generates a bending magnetic field; a radio-frequency power source that generates a radio-frequency electric field in accordance with an orbital frequency of charged particles; a radio-frequency electromagnetic field coupling part connected to the radio-frequency power source; an acceleration electrode connected to the radio-frequency electromagnetic field coupling part; and an acceleration-electrode-opposing ground plate provided to form an acceleration gap between the plate itself and the acceleration electrode, for generating the radio-frequency electromagnetic field in an orbiting direction of the charged particles; wherein the bending electromagnet generates the bending magnetic field varying in such a way that the orbital frequency of the charged particles varies in a variation range of 0.7% to 24.7% with respect to an orbital frequency at the charged-particles' extraction portion, during a time of injection to extraction of the particles. | 08-30-2012 |
20130009571 | COMPACT, COLD, SUPERCONDUCTING ISOCHRONOUS CYCLOTRON - A compact, cold, superconducting isochronous cyclotron can include at least two superconducting coils on opposite sides of a median acceleration plane. A magnetic yoke surrounds the coils and a portion of a beam chamber in which ions are accelerated. A cryogenic refrigerator is thermally coupled both with the superconducting coils and with the magnetic yoke. The superconducting isochronous cyclotron also includes sector pole tips that provide strong focusing; the sector pole tips can have a spiral configuration and can be formed of a rare earth magnet. The sector pole tips can also be separated from the rest of the yoke by a non-magnetic material. In other embodiments, the sector pole tips can include a superconducting material. The spiral pole tips can also include cut-outs on a back side of the sector pole tips remote from the median acceleration plane. | 01-10-2013 |
20130106315 | Cyclotron Able to Accelerate At Least Two Types of Particles | 05-02-2013 |
20130127375 | Programmable Radio Frequency Waveform Generator for a Synchocyclotron - A synchrocyclotron includes a resonant circuit that includes electrodes having a gap there between across the magnetic field. An oscillating voltage input, having a variable amplitude and frequency determined by a programmable digital waveform generator generates an oscillating electric field across the gap. The synchrocyclotron can include a variable capacitor in circuit with the electrodes to vary the resonant frequency. The synchrocyclotron can further include an injection electrode and an extraction electrode having voltages controlled by the programmable digital waveform generator. | 05-23-2013 |
20130141019 | Cyclotron Comprising a Means for Modifying the Magnetic Field Profile and Associated Method - The present invention relates to a cyclotron capable or producing a first beam of accelerated charged particles defined by a first <> ratio (q/m) or a second beam of accelerated charged particles defined by a second <> ratio (q/m)′ less than said first <> ratio (q/m), said cyclotron comprising:
| 06-06-2013 |
20130162176 | Device And Method For Fast Beam Current Modulation In A Particle Accelerator - The present invention relates to a circular particle accelerator capable of modulating the particle beam current exiting the circular particle accelerator. The circular particle accelerator includes: an ion source for generating the particle beam; Dee electrode and counter-Dee electrode separated from each other by gaps for accelerating the particle beam, the counter-Dee electrode being grounded; a generator capable of applying an alternating high voltage to the Dee electrode, so as it is possible to have an electric field between the gaps; means for measuring the current intensity of the particle beam exiting the circular particle accelerator. It also comprises a regulator capable of modulating the Dee electrodes voltage amplitude (V | 06-27-2013 |
20130169194 | CYCLOTRON ACTUATOR USING A SHAPE MEMORY ALLOY - An actuator assembly for use within the vacuum field of a cyclotron, one embodiment of which comprises an interactor which is moveable between a first position and a second position, at least one support structure for supporting the interactor in the first and second positions, a shape memory alloy (SMA) element connected to the interactor and/or support structure and being adapted to exert a force on the interactor and/or support structure so as to urge the interactor from the first position to the second position, an electromagnetic activator operatively associated with the SMA element for causing the element to exert the force when the electromagnetic activator is selectably activated, and a return mechanism operatively connected to the interactor, the support structure and/or the SMA element so as to urge the interactor from the second position to the first position when the electromagnetic activator is deactivated. | 07-04-2013 |
20130249443 | Compensated Precessional Beam Extraction for Cyclotrons - A plurality of magnetic extraction bumps are incorporated into a cyclotron that further includes (a) a pair of magnetic coils encircling a central axis and positioned on opposite sides of a median acceleration plane and (b) a magnetic yoke encircling the central axis and including a return yoke that crosses the median acceleration plane and a first and second pole on opposite sides of the median acceleration plane. The magnetic extraction bumps extend in series radially from the central axis on opposite sides of the median acceleration plane and can be used to extract an orbiting accelerated ion from the cyclotron. | 09-26-2013 |
20130307438 | Centroidal Cycltron Charged Paticle Accelerator - The Centroidal Cyclotron reveals an apparatus and method for accelerating and trapping charged particles in a solenoid magnetic field. An oscillating electric field is applied generally transverse to the magnetic field axis accelerating and trapping charged particles by their inherent cyclotron frequency at a given magnetic field of the solenoid magnetic field producing charged particle orbits with minimum canonical angular momentum orbits and gyro-phase synchrony. | 11-21-2013 |
20140001983 | ELECTRON CYCLOTRON RESONANCE IONISATION DEVICE | 01-02-2014 |
20140028220 | Phase-Lock Loop Synchronization Between Beam Orbit And RF Drive In Synchrocyclotrons - The invention specifies the use of feedback in the radio frequency (RF) drive for a synchrocyclotron, controlling the phase and/or amplitude of the accelerating field as a means to assure optimal acceleration of the beam, to increase the average beam current and to alter the beam orbit in order to allow appropriate extraction as the beam energy is varied. The effect of space charge is reduced by rapid acceleration and extraction of the beam, and the repetition rate of the pulses can be increased. Several means are presented to monitor the phase of the beam in synchrocyclotrons and to adjust the phase and amplitude of the RF to optimize the acceleration of the beam and to adjust the extraction and injection of the beam. Also, the use of a pulsed ion source that matches the acceptance window of the synchrocyclotron is described. | 01-30-2014 |
20140042934 | CYCLOTRON - A cyclotron includes: a regenerator configured to move a beam of a charged particle on an orbit radially outward; and a magnetic channel configured to put the beam on an extraction orbit. The regenerator includes a pair of magnetic members for a regenerator. The magnetic member for a regenerator includes a first portion including a portion becoming closer to the median plane radially outward and an apex closest to the median plane. When viewed from the circumferential direction, assuming that a distance between the centerline of the apex in the radial direction and a first reference position set on a radially inner end side of the first portion is a first distance and a distance between the centerline and a second reference position set on a radially outer end side of the first portion is a second distance, the first distance is greater than the second distance. | 02-13-2014 |
20140062343 | CYCLOTRON - A cyclotron that accelerates an ion using a magnetic field includes a hollow yoke and an ion source that is provided in the yoke and generates an ion. The ion source includes a conductive cylindrical body and a filament disposed in the cylindrical body. A current is supplied from a power supply to the filament, and a direction of the current supplied to the filament is changed. | 03-06-2014 |
20140062344 | INTERRUPTED PARTICLE SOURCE - A synchrocyclotron includes magnetic structures to provide a magnetic field to a cavity, a particle source to provide a plasma column to the cavity, where the particle source has a housing to hold the plasma column, and where the housing is interrupted at an acceleration region to expose the plasma column, and a voltage source to provide a radio frequency (RF) voltage to the cavity to accelerate particles from the plasma column at the acceleration region. | 03-06-2014 |
20140091734 | Control System for a Particle Accelerator - An example particle therapy system includes a particle accelerator to output a particle beam, where the particle accelerator includes: a particle source to provide pulses of ionized plasma to a cavity, where each pulse of the particle source has a pulse width corresponding to a duration of operation of the particle source to produce the corresponding pulse, and where the particle beam is based on the pulses of ionized plasma; and a modulator wheel having different thicknesses, where each thickness extends across a different circumferential length of the modulator wheel, and where the modulator wheel is arranged to receive a precursor to the particle beam and is configured to create a spread-out Bragg peak for the particle beam | 04-03-2014 |
20140097769 | PARTICLE ACCELERATOR AND METHOD OF REDUCING BEAM DIVERGENCE IN THE PARTICLE ACCELERATOR - An oscillating field particle accelerator and a method of reducing beam divergence in the particle accelerator are provided. The particle accelerator includes an intermediate electrode disposed within the particle accelerator between a source of charged particles and a second electrode of the particle accelerator. The charged particles are exposed to a first electric field extending between the source and the intermediate electrode prior to being exposed to a second electric field extending between the intermediate electrode and the second electrode. The magnitude of the first electric field is less than the peak magnitude of the second electric field, and may be less than or equal to a minimum magnitude of the second electric field occurring during a phase acceptance time period associated with a phase acceptance of the particle accelerator. The accelerated charged particles emerge from the second electrode as a non-diverging or reduced divergence particle beam. | 04-10-2014 |
20140103839 | Variable Rotating Capacitor for Synchrocyclotron - A variable rotating capacitor or RotCo | 04-17-2014 |
20140152198 | CYCLOTRON - There is provided a cyclotron including: a hollow yoke including first and second yoke portions facing each other and a side yoke portion connecting the first and second yoke portions to each other; first and second poles provided in the yoke so as to face each other; a coil disposed so as to surround the first and second poles; a D electrode provided between the first and second poles; a power source configured to supply electric power to the coil; a pole temperature detector configured to detect a temperature of at least one of the first and second poles; a yoke temperature detector configured to detect a temperature of the side yoke portion; and a control unit configured to control supply of electric power to the coil by the power source on the basis of detection results of the pole temperature detector and the yoke temperature detector. | 06-05-2014 |
20140197761 | FACILITY FOR MICROWAVE TREATMENT OF A LOAD - The invention relates to a facility ( | 07-17-2014 |
20140320044 | RF SYSTEM FOR SYNCHROCYCLOTRON - The present invention relates to an RF system ( | 10-30-2014 |
20140354190 | METHODS FOR ADJUSTING THE POSITION OF A MAIN COIL IN A CYCLOTRON - The invention concerns methods for adjusting the position of a main coil assembly in a cyclotron with respect to a median plane (M) and/or to a central axis (Z) of the cyclotron. | 12-04-2014 |
20150077022 | PARTICLE ACCELERATORS HAVING EXTRACTION FOILS - A particle accelerator including an electrical field system and a magnetic field system that are configured to direct a particle beam of charged particles along a designated path within an acceleration chamber. The particle accelerator also includes a foil holder having a beam window and a positioning slot that at least partially surrounds the beam window. The positioning slot is dimensioned to hold an extraction foil such that the extraction foil extends across the beam window and into the path of the charged particles. The positioning slot is defined by interior reference surfaces that face the extraction foil and retain the extraction foil within the positioning slot. The reference surfaces permit the extraction foil to move relative to the reference surfaces when the particle beam is incident on the extraction foil. | 03-19-2015 |
20150359081 | BEAM CURRENT VARIATION SYSTEM FOR A CYCLOTRON - Beam current variation system for a cyclotron, arranged in the inner centre of the cyclotron, downstream from the ion source generating the charged particle beam, the system comprising a deflector system powered by a voltage and a collimator. The beam is dumped in the collimator, if the deflector system ( | 12-10-2015 |
20160050742 | EXTRACTION SYSTEM AND PARTICLE ACCELERATOR HAVING A FOIL HOLDER - A particle accelerator including an electrical field system and a magnetic field system that are configured to direct a particle beam of charged particles along a designated path within an acceleration chamber. The particle accelerator also includes a foil holder having a beam window and a positioning slot that at least partially surrounds the beam window. The positioning slot is dimensioned to hold an extraction foil such that the extraction foil extends across the beam window and into the path of the charged particles. The positioning slot is defined by interior reference surfaces that face the extraction foil and retain the extraction foil within the positioning slot. The reference surfaces permit the extraction foil to move relative to the reference surfaces when the particle beam is incident on the extraction foil. | 02-18-2016 |
20160143124 | HIGH CURRENT CYCLOTRON - Cyclotron for accelerating charged particles around an axis, comprising an electromagnet with an upper pole and a lower pole, producing a magnetic field in the direction of said axis; a Dee electrode assembly and a counter Dee electrode assembly separated from each other by a gap for accelerating said charged particles and a pair of ion sources located in a central region of the cyclotron. Said ion sources are located at a distance of said axis such that the particles emitted from the first ion source pass between said first and second ion sources after a path of half a turn, and radially outwards of the second ion source after a path of three half-turns, and reciprocally. | 05-19-2016 |
20160183416 | RADIO-FREQUENCY POWER GENERATOR CONFIGURED TO REDUCE ELECTROMAGNETIC EMISSIONS | 06-23-2016 |
20160205760 | ADJUSTING ENERGY OF A PARTICLE BEAM | 07-14-2016 |