An irradiation control device which controls irradiation of charged particles to a target that includes a substance that generates neutrons by being irradiated with a charged particle beam, includes: a deflector that deflects the charged particles; and a controller that controls the deflector such that a plurality of peaks of heat density formed by the beam are formed between a center of an irradiation surface of the target and an end portion of the irradiation surface by moving the beam of the charged particles on the irradiation surface.

The present disclosure provides a radiation therapy device and a magnetic resonance guided radiation therapy system. The radiation therapy device may include an electron gun and a curved beam deflection unit. The beam deflection unit may be configured to accelerate an electron beam emitted from the electron gun within a magnetic field. The magnetic resonance guided radiation therapy system may include a radiation therapy device and a magnetic resonance imaging (MRI) device.

Provided is an electromagnetic field control member including a first insulating member that is made of a ceramic having a tubular shape and includes a plurality of through holes extending in an axial direction; a conductive member made of a metal, the conductive member sealing off each of the through holes and leaving an opening portion in the through hole, the opening portion opening to an outer periphery of the first insulating member; a power feed terminal connected to the conductive member; and flanges respectively located at two ends of the first insulating member. A second insulating member made of a ceramic having a tubular shape is disposed on an outer peripheral side of the first insulating member, and includes two ends that are hermetically fixed to the flanges, respectively.

Disclosed a particle accelerator that accelerates a charged particle beam while circulating the charged particle beam as a circulating beam and outputs some of the circulating beam as an output beam, the particle accelerator including: a first deflection section and a second deflection sections each having a deflection electromagnet; a first straight section, a second straight section, and third straight section each not having the deflection electromagnet; and a control unit, wherein a preceding output deflector of the first straight section deflects some of the circulating beam toward an inner side of a circulating trajectory of the circulating beam to separate the some of the circulating beam as an output beam, wherein a succeeding output deflector of the third straight section deflects the output beam separated from the circulating beam by the preceding output deflector toward an outer side of the circulating trajectory of the circulating beam, and wherein the control unit controls at least the quadrupole electromagnet such that a phase advance of a betatron oscillation of the output beam is 270±45 degrees in a section from the preceding output deflector to the succeeding output deflector.

A method and a device for changing direction of movement of a beam of accelerated charged particles are based on the use of a curved channel which is made from a material that is able to be electrically charged, and formation of the same kind of charge on an inside surface of the channel wall as that of the particles. Maintenance of a condition that relates an energy and a charge of the particles to geometrical parameters of the channel is required, in particular, a radius R of curvature of a longitudinal axis thereof, and to electrical strength of the wall material. The beam can possibly be rotated through large angles without loss of intensity, significantly simplifying a design, and also reducing the mass and dimensions of all devices, particularly by obviating a need for magnets and supply voltage and control voltage sources for such devices.

A beam transport assembly conveys a particle beam from a particle source to an irradiation nozzle, which rotates about a swivel axis at the horizontal input of the nozzle. A support can move horizontally in a plane perpendicular to the swivel axis. The beam transport assembly can change a path length of the particle beam so as to follow a vertical location of the swivel axis of the irradiation nozzle with respect to the support. A controller can coordinate the path length change of the particle beam, rotation of the irradiation nozzle about the swivel axis, and/or horizontal motion of the support to provide irradiation of a supported object from various angles in the plane perpendicular to the swivel axis while maintaining the irradiation nozzle at a constant distance from the supported object.

A device and method for generating pulses to activate and deactivate a kicker magnet is provided. When the kicker magnet is deactivated the circuit generates and stores a magnetic field in an inductor. When the kicker magnet is activated, the circuit changes configuration so that the magnetic field and current stored in the inductor can provide the necessary current to activate the kicker magnet is a minimal amount of time. The configuration of the circuit changes via the use of switches. The switches can employ Zener diodes arranged so as to provide protection against high voltage events and rogue neutrinos that may bombard the switches when the kicker magnet is used in the context of deflecting a particle beam.

Disclosed embodiments include an electron accelerator, having a resonant cavity having an outer conductor and an inner conductor; an electron source configured to generate and to inject a beam of electrons transversally into the resonant cavity; a radio frequency (RF) source coupled to the resonant cavity and configured to: energize the resonant cavity with an RF power at a nominal RF frequency, and generate an electric field into said resonant cavity that accelerates the electrons of the electron beam a plurality of times into the cavity and according to successive and different transversal trajectories; and at least one deflecting magnet configured to bend back the electron beam that emerges out of the cavity and to redirect the electron beam towards the cavity.

There is provided a multipole magnet for deflecting a beam of charged particles. The multipole magnet comprises a plurality of ferromagnetic poles and a plurality of permanent magnet assemblies to supply a magnetomotive force to the ferromagnetic poles. At least one of the permanent magnet assemblies has a plurality of discrete permanent magnet positions and a plurality of permanent magnets each fixed in one of the permanent magnet positions.

There is provided a cyclotron which accelerates a charged particle in an orbital trajectory to emit a charged particle beam. The cyclotron includes a magnetic pole that generates a magnetic field required for accelerating the charged particle, and a magnetic channel portion having a magnetic channel disposed on an outer peripheral portion of the orbital trajectory to guide the charged particle beam to an extraction trajectory and to focus the charged particle beam. The magnetic channel portion is attached to the magnetic pole.