An example particle therapy system includes: a particle accelerator to output a beam of charged particles; and a scanning system to scan the beam across at least part of an irradiation target. An example scanning system includes: a scanning magnet to move the beam during scanning; and a control system (i) to control the scanning magnet to produce uninterrupted movement of the beam over at least part of a depth-wise layer of the irradiation target so as to deliver doses of charged particles to the irradiation target; and (ii) to determine, in synchronism with delivery of a dose, information identifying the dose actually delivered at different positions along the depth-wise layer.

Disclosed is a beam energy dispersion adjusting mechanism for superconducting proton cyclotron. The adjusting mechanism includes a vacuum cavity, bases are symmetrically mounted on outer walls of four faces of the vacuum cavity in horizontal and vertical directions, an electric cylinder and a transmission mechanism are mounted on each of the four bases, a jaws block and a position fixing plate are correspondingly provided on an inner wall of the vacuum cavity at each face. The transmission mechanism includes an oil-free sleeve, a moving connecting rod onto which the position fixing plate is fixed, a corrugated pipe, and an electric cylinder connecting block whose both ends are screwed with the moving connecting rod and the electric cylinder, the jaws block is fixedly connected with the position fixing plate. The disclosure utilizes the electric cylinder to drive the jaws block to complete specified linear displacement, and satisfies back-end beam quality requirements.

An example system includes: a magnet including one or more coils to conduct current to generate a magnetic field, with the magnetic field to affect output of radiation to a target; and one or more actuators, with an actuator among the one or more actuators being at least part of a physical coupling to the one or more coils, and with the actuator being controllable to move the one or more coils via the physical coupling based on movement of the magnet.

A technique for controlling and compensating the energy spread of a charged particle beam is provided. This technique is based on a passive dielectric-loaded structure that redistributes the energy within the bunch by means of the wakefield generated in the structure. Cylindrical and planar structure configurations are provided and also means for electrical and mechanical tuning to optimize performance. The instant abstract is neither intended to define the invention disclosed in this specification nor intended to limit the scope of the invention in any way.

A proton treatment system including a proton accelerator structured to generate a proton beam, a beamline pathway configured to direct the proton beam from the proton accelerator to at least one treatment room, a magnet assembly, including superconducting magnets, located in the beamline pathway and configured to transport the proton beam away from the accelerator into the at least one treatment room, an achromat, configured as an achromatic superconducting magnet assembly, that bends the proton beam away from the proton accelerator toward the at least one treatment room, and a collimator provided inside the achromat and configured to select the proton beam with desired energy levels.

An accelerator 4 includes a circular vacuum container including circular return yokes 5A, 5B. An injection electrode 18 is disposed closer to an inlet of a beam extraction path 20 in the return yoke 5B than a central axis C of the vacuum container. Magnetic poles 7A to 7F are radially disposed from the injection electrode 18 at the periphery of the injection electrode 18 in the return yoke 5B. Recessions 29A to 29F are disposed alternately with the magnetic poles 7A to 7F in the circumferential direction of the return yoke 5B. In the vacuum container, a concentric trajectory region, in which multiple beam turning trajectories centered around the injection electrode 18 are present, is formed, and an eccentric trajectory region, in which multiple beam turning trajectories eccentric from the injection electrode 18 are present, is formed around the region.

An example system includes: a magnet including one or more coils to conduct current to generate a magnetic field, with the magnetic field to affect output of radiation to a target; and one or more actuators, with an actuator among the one or more actuators being at least part of a physical coupling to the one or more coils, and with the actuator being controllable to move the one or more coils via the physical coupling based on movement of the magnet.

In one embodiment of the invention, a method for irradiating a target is disclosed. A proton beam is generated using a cyclotron. A first information is provided to an energy selection system. An energy level for the protons is selected using an energy selection system based on the first information. The first information comprises a depth of said target. The proton beam is routed from the cyclotron through a beam transfer line to a scanning system. A second information is provided to the scanning system. The second information comprises a pair of transversal coordinates. The proton beam is guided to a location on the target determined by the second information using a magnet structure. The target is irradiated with the protons.

A charged particle beam treatment system includes a cyclotron that accelerates charged particles so as to emit a charged particle beam, an irradiation nozzle that irradiates a patient with the charged particle beam, a beam transport line along which the charged particle beam B emitted from the cyclotron is transported to the irradiation nozzle, profile monitors and that are provided in the beam transport line and detect a position of the beam, and steering electromagnets that are provided on an upstream side of the profile monitors, and adjust a position of the beam.

In various embodiments, a radiation therapy system can include a cyclotron that outputs a charged particle beam. In addition, the radiation therapy system can include an apparatus to receive the charged particle beam from the cyclotron. The apparatus decelerates or further accelerates the charged particle beam to produce a reduced or increased energy charged particle beam. The apparatus can include a radio frequency structure.